PROPOSED DESIGN OF MODERN RICE MILL AT WAMAKKO SOKOTO STATE WITH EMPHASIS ON EFFECTIVE VENTILATION

The Proposed Design of A Rice Mill brought about a turning point in the design of factories. Responses in this vein were mostly concentrated on the simplistic one of sealing the factory against outdoor conditions. This approach towards natural ventilation. The aim of this research work is to design a well-ventilated Rice Mill. The project discusses methods by which the cooling load of buildings canbereducedtremendouslyandtomaximizetheuseofnaturalwaysto achievethermalcomfort in buildings, italso showsthe waysthese passive design and cooling strategies can be adopted. The project concludes that the application of these techniques will reduce energy demand and provide a more comfortable living environment and low carbon emitting buildings that are environmentally conscious and energy efficient. In this research work, the Rice Mill Factory is located in Wamakko, which uses cladding as its walling system, introduction of windows, door, fixed windows, proper orientation, to enhance user perception towards environmental conditions, and health problems.Natural ventilation potential of the factory in terms of energy consumption was put into consideration. TABLEOFCONTENTS Content Page CoverPage i Title Page ii Declaration iii Certification iv Dedication v Acknowledgement vi Abstract vii Table of Content viii List of Tables xi List of Figures xii List of Plates xiii Abbreviations, Glossaries and Symbols xvi Definition of Operational Terms xvii CHAPTERONE:INTRODUCTION BackgroundtotheStudy 1 StatementoftheResearchProblem 2 AimandObjectives 2 ResearchQuestions 2 ScopeoftheStudy 3 LimitationsofStudy 3 1.6 SignificanceoftheStudy/JustificationfortheStudy 4 CHAPTERTWO:REVIEWOFRELATEDLITERATURE Introduction 5 BackgroundtotheStudy 5 RiceMilling,Worker’sHealthandVentilationinSokotoState 6 RiceIndustryExpansionandProcessingEfficiency 7 PassiveandMechanicalVentilationStrategiesinHotClimates 7 AdaptationStrategiesandTechnologyGaps 8 IndustrialVentilationSystems:PrinciplesandApplications 8 RelevanceofVentilationandModernDesignsinRiceMillingFacilities 9 CHAPTERTHREE:MATERIALSANDMETHODS/RESEARCHMETHODOLOGY Introduction 10 ResearchDesign 10 PopulatingtheStudy 10 SamplingTechniques 10 MethodsofDataCollection 11 PrimaryDataCollection 11 StudyArea 12 LocationMap 13 ClimateofWamakko,SokotoState 16 CaseStudyOne 19 CaseStudyTwo 22 CaseStudyThree 26 TheSite 28 SiteSelectionCriteria 28 Site Location 31 Site Analysis 31 SitePlaningConsideration 32 SiteDesignConsideration 33 DataAnalysis 37 ConclusionforDesignImplementation 37 CHAPTERFOUR:DESIGNREPORT/RESULTS Introduction 38 DesignBrief 39 SpaceRequirements 40 Site Location (includes Google earth images, road maps and other relevant maps) 42 PlanningPrinciples/Considerations 44 ConceptandDesign 44 DesignCharacteristics 49 MaterialsandMethodsofConstruction 49 LandscapeandExternalWorks 51 CHAPTERFIVE:SUMMARY,CONCLUSIONANDRECOMMENDATIONS Summary 52 Conclusion 52 Recommendations 53 REFERENCES 55 LISTOFTABLES Table Page Table2.1 ComparisonofVentilationSystems 30 Table4.1 ScheduleofAccommodation 40 LISTOFFIGURES Figure Page Figure3.1MapofNigerian 13 Figure3.2MapofSokotoState 14 Figure3.3MapofWamakko 15 Figure3.4AverageHighandLowTemperatureofWamakko 16 Figure3.6HumiditycomfortLevelsofWamakko 17 Figure3.5AverageMonthlyRainfallofWamakko 18 LISTOFPLATES Plate Page Plate3.1AdministrativeBlock 20 Plate3.2Boilers 20 Plate3.3 Dryers/loadingarea 21 Plate3.4 Production Hall 21 Plate3.5 Dryers/Store 24 Plate3.6 Boilers/Dryers 24 Plate3.7 Production unit 24 Plate3.8 Production Hall 24 Plate3.9 Entrance 26 Plate3.10Finishedgoodsstore 26 Plate3.11Controlunit 26 Plate3.12Packaging 26 Plate3.13:Packagingmachine 27 Plate4.4 GoogleEarthViewShowingtheProposedSite 28 Plate4.5 SitePlanoftheProposedRicemill 45 Plate4.6FloorPlanof theProductionUnit 46 Plate4.7RoofPlan oftheProductionUnit 46 Plate4.8SectionoftheProductionUnit 47 Plate4.9FrontElevationoftheProductionUnit 47 Plate4.10BackElevationoftheProductionUnit 47 Plate4.11RightElevationoftheProductionUnit 48 Plate4.11LeftElevationoftheProductionUnit 48 ABBREVIATIONS,GLOSSARIESANDSYMBOLS Abbreviations IAQ-IndoorAirQuality SBS-SickBuildingSyndrome HVAC-heating,ventilatingandair-conditioning Symbols0C=DegreeCelsius %=Percentage m2=MetreSquare mm=Millimetre Km=Killomtre Min=Minutes CHAPTERONE INTRODUCTION BackgroundtotheStudy Rice is one of the most important food crops in the world, second only to wheat in terms of how much is produced each year. It is a major source of food for about half of the world’s population.As the global population continues to grow and farmland becomes less available, there is need for new rice varieties that produce high yields, of good quality and can resist pests, diseases, and extreme weather (Lee, 2020). After rice is harvested, it still has its outer husk or bran layers. Therefore, it must go through processing before it is ready to eat. This is done in rice mills—special facilities where raw rice (calledpaddy)iscleaned,processed,andturnedintoediblerice.Thesericemillsnowuse modern machines to make processing easier and faster. However, these machines often produce heat and dust while working. Because of this, proper ventilation is very important in rice mills to keep the air clean and cool. Ventilationmeansbringingfreshoutdoorairintoaspace.It helpsremoveheat, humidity, dust, andharmfulgases.Ventilationalsomakestheindoorenvironmentmorecomfortablefor workers.Therearethreemaintypesofventilation:naturalventilation,mechanicalventilation, and hybrid (mixed-mode) ventilation, which combines both natural and mechanical systems. StatementoftheResearchProblem Ifaricemillisnotwell-ventilated,carbondioxidecanbuildupwhileoxygenlevelsdrop.This canmakeworkersfeeltired,dizzy,orshortofbreath.Machinesmayalsooverheat,slowing down production. InSokotoState,temperaturesoftenrangebetween38°Cand42°C,whichmakesproper ventilation in indoor areas even more important. AimandObjectives Aim: TodesignaModernRiceMillbuildingwitheffectiveandefficientventilation. Objectives: 1. Toprovideenoughopenablewindowsandplacethebuildingintherightdirectiontoallow natural airflow. 2. Toapplymechanicalventilationmethodsforbalancedindoorairmovement. 3. Touseacombinationofnaturalandmechanicalsystems(mixed-modeventilation)forbetter air quality and comfort. ResearchQuestions 1. WhatarethebestdesignstrategiestoachievenaturalventilationinaRiceMill? 2. WhatothermethodscanbeusedtoimproveventilationinRiceMillingBuildings? 3. HowcanmaximumventilationbeachievedinthedesignofaRiceMillFactory? ScopeandLimitations I. AdministrativeBlock 1. Reception 2. GeneralManager’sOffice 3. Accountant’sOffice 4. MarketingOffice 5. RecordRoom 6. BoardRoom II. ProductionHall 1. Laboratory 2. Male/FemaleChangingRoom 3. MaintenanceUnit 4. FirstAidRoom III. WareHouse IV. RawMaterialsStorage III.AuxiliaryUnit 1. SecurityHouse 2. GeneratorHouse 3. Restaurant 4. Mosque SignificanceoftheStudy Ventilation is necessaryin indoor spaces to remove stale air and replaceit with fresh air.This helps to moderate internal temperatures, reduces the accumulation of moisture, odors and other gases that can build up during occupied periods. Ventilationisa necessityinaRiceMillbecausewithoutgoodventilationthe workerswon’thave a favourable environment to work with, engines overheat, presence of moisture which could damage the product (rice). CHAPTERTWO:REVIEWOFRELATEDLITERATURE Introduction Thischapterreviewsrecent literature(2020–2025) onmodernarchitecturalventilation strategies in rice milling facilities, especially under hotclimatessuch as Sokoto State, Nigeria.It also surveys the evolution of Rice Processing in Nigeria, worker’s health in Mills, and design implications for facility efficiency and safety. BackgroundtotheStudy Rice remains a critical staple food in Nigeria, forming a central part of the nation's food security strategy. Over thepast twodecades, domestic rice productionhasexpanded significantly, driven by rising demand from Nigeria's rapidly urbanizing population. According to Adegbite et al.(2021), Nigeria is both the largest producer and consumer of rice inWest Africa, yet its millingand processing infrastructure remains underdeveloped and often inefficient. A substantial portionofpost-harvestlossesandqualitydegradationinlocallymilledricehasbeenattributedto outdated equipment and poor facility design—particularly in regard to heat, humidity, and dust control. Industrial-scale rice milling facilities use machineries such as parboilers, de-stoners, dryers, and polishers, all of which generate significant internal heat and airborne particulate matter. This is especially problematic in hot northern regions like Sokoto, where ambient temperatures regularly exceed 40°C during dry seasons (Jaafar et al., 2023). In such environments, the need for well-designedventilationsystemsbecomesparamount—notonlytoensureworker’ssafetyand comfort but also to enhance equipment performance and prolong lifespan. Studies by Azees et al. (2022) documented severe respiratory symptoms and reduced pulmonary function in workers exposed to poorly ventilated rice mills in Sokoto. Furthermore, the economic viabilityofmillingoperationsiscompromisedwhenproductivityisreducedbyexcessiveindoor heat and worker fatigue. Despite the Nigerian government's support for agro-industrial transformation under programmes like the Agricultural Transformation Agenda (ATA), many facilities still lack the technical inputs—especially environmental controls—necessary for competitiveness (Gaya et al., 2024). Recent architectural research advocates the integration of climate-responsive design strategies in industrial buildings. Passive ventilation methods, such as cross-ventilation, stack effect, and roof venting,whencombinedwithmechanicalsystemslikefansorHVACunits,candrastically reduce indoor heat accumulation and air pollution (Ebohon & Buba, 2023). These approaches are particularlyrelevantforricemillslocatedinsavannaandsemi-aridregionswhereenergycosts are high and cooling demands are intense. Thisstudythereforeinvestigatestheapplicationofmodernarchitecturalprinciples,withafocus on industrial ventilation, in the design of rice milling facilities suitable for Sokoto’s climatic conditions. It highlights the intersection of architecture, engineering, and agricultural processing withinthebroadergoalofenhancingNigeria’sfoodprocessingcapacityandrural industrialization. RiceMilling,Worker’sHealth,andVentilationinSokotoState Azees etal. (2022) investigated respiratory health among rice mill workers in Sokoto State. They found a high prevalence of respiratory symptoms—cough, chest tightness—linked to exposure to dust and poor ventilation in Milling environments. Another study by Azees etal. confirmed lung function impairments in a majority of these workers, highlighting the urgent need for improved ventilation and air quality controls. These workplace health issues reinforce the necessity of integrating effective ventilation architecture in rice milling plants, especially under extreme heat and dust conditions typical of Sokoto. RiceIndustryExpansionandProcessingEfficiency Jaafar etal. (2023) evaluated modern rice mills in Bauchi State. They reported average capacitiesof about 1.4 tonnes/hour and 12-hour workdays, all reliant on electricity. Environmental controlwasnotexplicitlyaddressed,butoperationalparameterssuggestheavyheatloadsindoors without climate-adaptive design considerations. Gaya etal. (2024) studied profitability in rice milling and marketing in Bauchi. High operational costs—diesel, transport—and inefficiencies in processing infrastructure were identified as constraintstocompetitiveness.Environmentallydriveninefficiencieslikeheatstresswere implied by association with extended work hours and high dust exposure. PassiveandMechanicalVentilationStrategiesinHotClimates A study in Kaduna (savanna climate analogous to Sokoto) evaluated passive design (roofinsulation, reflective materials), mechanical ventilation, and their combination to optimize indoor thermal comfort. The hybrid approach significantly reduced indoor temperatures and reliance on active cooling systems. This model suggests applicability to industrial buildings like rice mills where heat and dust are major factors. Ventilated cooling techniques (mixing natural and mechanical ventilation to remove heat without full HVAC systems) are recognized globally to reduce energy demands and improve indoor conditions in hot climates. Displacement ventilation, effective in industrial spaces, offers targeted removal of hot air from upperzones,enhancing thermalcomfortwithoutexcessiveairflowrequirements.Itpairs especially well with source-level capture and stratified airflow patterns. AdaptationStrategiesandTechnologyGaps Ricemillershave beenobservedadaptingmilling operations in responsetoclimatevariability such as shifting times of operation and modifying equipment to reduce heat and moisture effects. Strengthening such climate-resilient infrastructures is essential for long-term resilience ofNigeria’s rice value chain. InAnambraState,researchersnotedthatthetechnologygapinprocessing(vs.production) affects milling efficiency. Improved ventilationsystems are among the technology inputs neededto close performance gaps and advance processing modernization efforts. IndustrialVentilationSystems:PrinciplesandApplications Industrialventilationsystemsarecategorizedintodilutionandlocalexhaustsystems: I. Dilution systems bring large volumes of cleanair to dilute contaminants.They are suitable forlow-to-moderate pollutant levels and dispersed sources, but require high makeup air volumes and are energy-intensive in hot climates. II. Localexhaustsystemscapturepollutantsattheirsourceusinghoodsandducts,reducingheat and dust exposure. Though more complex and costly, they are ideal in rice mills with high dust generation and machinery heat. These designs benefit from ventilative cooling strategies like displacement ventilation and hybrid passive/mechanical systems adapted to tropical savanna climates. 2.8RelevanceofVentilation&ModernDesignsinRiceMillingFacilities Integrationofproperventilation iskeyto meetingworkerhealth andequipmentefficiency needs in hot locations such as Sokoto. Findings from the Sokoto respiratory studies (Azees et al., 2022) make clear that inadequate ventilation is contributing to occupational illness. Passive-plus-mechanical strategies (reflective roofs, airflow control) offer scalable, cost-effective solutions to reduce temperatures and dust exposure. Modern architectural designs—embracing passive cooling, natural ventilation, displacement airflow,andsourceextractionsystems—cansignificantlyenhanceprocessingperformance, energy efficiency, and worker well-being in Nigerian rice mills. CHAPTERTHREE:RESEARCHMETHODOLOGY Introduction Thischapteroutlinesthemethodologyemployedinconductingthe research.Itdetails the sampling technique used, the various data collection methods adopted, and the rationale for selectingspecificcasestudies.FourlocalRiceMillwerevisited,andtwointernationalcase studies were analyzed to inform the design principles relevant to this study. ReseacrchDesign The research design adopted for this study is descriptive and exploratory in nature. It combines both qualitative and quantitative approaches in order to collect, analyze and interpret relevant data. The descriptive approach enabled the the researcher to document existing conditions ofRice Milling practices, while the exploratory approach made it possible to investigate newdesign solution and best practice in Rice Mill planning. PopulatingtheStudy The study population consists of Rice farmers, mill operators, traders and laborers in Wamakko LGA who are directly engaged in Rice Production and Processing. Relevant institutions such as cooperatives and agricultural agencies were also considered, as they provide support services and influence Milling activities in the area. SamplingTechnique For this research,purposive sampling was adopted. This technique involves the deliberateselection of participants or cases based on predefined criteria that align with the researchobjectives.Thesamplingfocusedonbuildingsandfacilitiesthatcloselyrelatetothesubject area, ensuring that the selected case studies provide valuable and relevant insights. MethodsofDataCollection Data for this research were collected using both primary and secondary sources to ensure a comprehensive understanding of the subject matter. PrimaryDataCollection Primarydataweregatheredthroughdirectobservation,interviews,andfielddocumentation. These methods provided firsthand information about the spatial design, ventilation systems, and operational layout of existing facilities. I. SiteVisits:PhysicalvisitswereconductedtofourselectedRiceMillFactorywithinNigeria. These visits enabled direct assessment of structural and functional elements relevant to theresearch topic. II. Interviews:Informalandsemi-structuredinterviewswereheldwithselectedstaffmembersat the visited facilities. These interviews provided insight into practical issues such as equipment arrangement, ventilation challenges, and user experience. III. PhotographicDocumentation: Several photographs were taken during the site visits to visually capture architectural features, spatial relationships, ventilation techniques, and mechanical installations. These visual data supported qualitative analysis and comparison. SecondaryDataCollection Secondarydatawereobtainedfromacademicandprofessionalliterature,includingjournal articles, books, and online sources. These materials helped to provide context, support findings,and inform the design direction of the proposed facility. I. BooksandJournals: A review of published literature on rice milling architecture, industrial ventilation systems, and sustainable building design was conducted. This helped to ground the research in established theory and practices. II. OnlineSources:Variouswebsitesofexistingricemillsandinternationaldesigncasestudies wereexaminedtounderstandcurrentdesigntrends,technologies,andinnovations.These includeddigitalarchives,industryblogs,andinstitutionalreports. III. PreviousResearchProjects: Relevant theses, dissertations, and research reports were also consulted to understand previous approachesand findings within similar fields of study. StudyArea SokotoStateisoneofthe36statesinNigeria,locatedinthenorthwesternregionofthecountry. It shares borders with Kebbi State to the west and south, Zamfara State to the east, and theRepublic of Niger to thenorth. Sokoto is known for itshot climate and strong cultural heritage. This study focuses specifically on Wamakko Local Government Area (LGA), one of the most populatedLGAsinSokotoState, with anestimatedpopulationof about309,400people asof 2022.Accordingtothe2006NationalPopulationCensus,Wamakkohadapopulationof 179,619, which has grown steadily over the years. Wamakko was chosen for this study because it is densely populated and strategically suitable for establishement of Modern Rice Mill compared to other parts of the state. The area is located between latitude 13.0302°N and 13.0399°N, and longitude 5.0936°E and 5.1195°E, based on the World Geodetic System. The climate in Wamakko is generally hot and dry, with the hottest months occurring between MarchandMay,whentemperaturescanreachbetween38°Cand42°C.Theharmattanseason occursfromlate Novembertoearly February, duringwhichtemperaturescandroptoaround 23°C. The rainy season begins in late May, with the heaviest rainfall typically between July and October. The area receives an average annual rainfall between 500 mm and 800 mm. MostpeopleinWamakkoareinvolvedinagriculture,growingvarioustypesofcrops.Others workinpublicandprivateoffices.ThepopulationispredominantlyMuslim,thoughthereare also Christians living in the area. The major languages spoken include Hausa and Fulani, alongwithotherNigerianandneighboringNigerRepubliclanguages.Theareaisnaturallyrichin Neem trees (Azadirachta indica), which are common throughout the region. LocationMaps Toproperlycontextualizethestudyarea,threelevelsoflocationmapsweredeveloped: i. NigeriaMap: This map shows Nigeria’s location within Africa and highlights Sokoto State in the northwestern part of the country. It provides a national perspective on the study area. Figure3.2:MapofNigeria Source:ResearchGate(2025) ii. SokotoMap: The map of Sokoto State identifies all Local Government Areas (LGAs), including WamakkoLGA.ThishelpstopositionWamakkowithintheadministrativeandgeographicalstructureof the state. Figure3.2:MapofSokotostate Source:ResearchGate(2025) iii. WamakkoMap: AdetailedmapofWamakkoLocalGovernmentAreaisprovided.Itincludeskeyfeaturessuch as settlements, road networks, rivers, elevation patterns, and Land use. This local-level map is essential for understanding the spatial dynamics relevant to thestudy. Figure3.2:MapofWamakkoTown/City Source:ResearchGate(2025) ClimateofWamakko,SokotoState Wamakko, like the rest of Sokoto State, experiences a semi-arid climate, characterized by high temperatures, low rainfall, and marked dry and wet seasons. The following climatic variables are particularly significant: i. Temperature: TemperaturesinWamakkoaregenerallyhighyear-round,oftenexceeding35°Cduringthe hottest months (March to May). Cooler temperatures are observed during the Harmattan season (December to February), especially at night. Figure32:TemperaturesofWamakko Source:WeatherSpark(2025) ii. Humidity: Humidity levels in Wamakko vary seasonally. During the rainy season (June to September),relative humidity increases, sometimes reaching 70–80%. However, during the dry season, particularly in Harmattan, humidity can drop below 30%. Figure3.3:HumiditycomfortlevelsofWamakko Source:WeatherSpark(2025) iii. SolarRadiation: Theregionreceivesintensesolarradiation,makingitoneofthesunniestplacesinNigeria.This is advantageous for solar energy applications and contributes to high evapotranspiration rates. iv. Rainfall: Annual rainfall in Wamakko ranges from about500 mm to 800 mm, with the rainy seasontypically spanning fromJune toSeptember.Rainfall is oftenerratic, affectingagriculture and water availability. Figure3.3:AverageMonthlyRainfallofWamakko Source:WeatherSpark(2025) v. Vegetation,etc.: The vegetation in Wamakko falls within the Sudan Savannah zone. It features short grasses, scatteredtrees,andshrubs.Thenaturalvegetationhasbeensignificantlyaltereddueto agricultural practices fuelwood harvesting, and urban expansion. CaseStudyOne:LabanaRiceMillingFactoryBirninKebbiLocation: This Rice Mill is located at bypass Area Birnin Kebbi, Kebbi State. BriefHistory: Labana Rice Mill LTD. Is an integrated rice mill that was established in Birnin Kebbi, Kebbi State in 2012. It commenced production in November 2014 with two independent plantsthathavethecapacitytoproduce400metrictonsperday.Thethirdadditionalplantthat is currently under construction has the capacity to produce 300 m,etric tons per day of parboiled rice these added up to 700 metric tons per day. ConstructionTechniques:The materials used are gravel, sand, cement, ebonite, strips,steel, aluminum roofing sheet and wire mesh, tiles, terrazzo floor with ebonite strip in the Production unit ceramic tile in the administrative I-section portal frame were used in Stores and Production Hall and masonry structural block was used for Administrativeand Auxiliary unit Scope:ThefollowingunitswereprovidedintheRiceMill 1. ADMINISTRATIVEBLOCK I. GeneralManager’sOffice II. ManagingDirector’sOffice III. FinancialManager’sOffice IV. Marketer’sOffice 2. PRODUCTIONUNIT I. RawMaterialsStore II. ProductionHall III. FinishedGoodsStore IV. Boiler/DrierUnit 3. AUXILARYUNIT I. ParkingArea II. SecurityHouse III. GeneratorHouse IV. Workshop DeductionsfromtheCaseStudyMerits I. Aweighbridgewasprovidedattheentranceandexitofthefactory II. Properparkingspacewasprovidedforthestaff III. GoodLandscaping Demerits I. Noparkingspacewasprovidedforoffloadingtrucksinthefactory II. Poorventilationintheproductionunitofthefactory Plate3.1:AdministrativeBlock Plate3.2:Boilers Source:Researcher’sfieldwork(2025) Source:Researcher’sfieldwork(2025) Plate3.3:Dryers/loadingarea Plate3.4:ProductionHall Source:Researcher’sfieldwork(2025) Source:Researcher’sfieldwork(2025) CaseStudyTwo:WACOTRiceLimitedArgungu,KebbiState. Location:ThisRicemillislocatedatArgungu,KebbiState. BriefHistory: WACOT Rice Limited is a rice processing company which operates a state of theart Rice Mill in Argungu. The Mill is one of the largest in Africa and sources paddy from various paddy processing states across Nigeria. WACOT Rice also engages in out-grower farming programmes with paddy farmers to boost their yields and guarantees off-take of paddy from farmers through buy back arrangements. ConstructionsTechniques:Thematerialsusedfortheconstructionofthisfactory included; Reinforced concrete which was applied for foundation , columns and load bearing structures. Finishing Materials included; terrazzo floors in Storage and Production areas for easy cleaning, ceramic tiles in the Offices for durability. Scope:Thefollowingunitswereprovidedinthefactory: 1. ADMINISTRATIVEBLOCK i. GeneralManager’soffice ii. AdministrativeOffice iii. FinanceOffice iv. RecordOffice v. ComputerRoom vi. BoardRoom 2. PRODUCTIONUNIT i. RawMaterialStore ii. ProductionHall iii. FinishedGoodsStore iv. Boiler/DrierUnit 3. AUXILARYUNIT i. SecurityHouse ii. GeneratorHouse iii. Workshop iv. DeductionfromtheCaseStudy Merits i. Goodlandscapingbothhardandsoft ii. Properorientationofbuildings iii. Tightsecurityattheentranceandexitofthefactory Demerits i. Noparkingspaceprovidedattheloadingbayfortrucks ii. Poorventilationofthefactorybuildings Plate3.5:Dryers/Store Plate3.6:ProductionHall Source:Researcher’sfieldwork(2025) Source:Researcher’sfieldwork(2025) Plate3.7:Productionunit Plate3.8:Drier/Boilers Source: Researcher’sfieldwork(2025) Source:Researcher’sfieldwork(2025) CaseStudyThree:AARYAPOONARiceMill. Location:ThisRiceMillislocatedatChhotkKharwa,India. BriefHistory: The factory was once part and diversified agriculture. It is also the last big factoryto produce rice in India. The factory started fully operation in the year 2006. The construction startedsince2004.Itprocessesabout3000metrictonsofRiceperdayandalso generates22mega watts of electric power. Scope:theRiceMillconsistsofthefollowingUnits: i. HallProduction ii. AdministrationBlock iii. FactoryAutomation iv. ByeProducts v. RawMaterialsStore vi. FinishedGoodsStore Observations I. Poorlandscaping II. Properventilation III. Goodprovisionwasmadefornatural IV. Noloadingbaywasprovided Plate3.11:Entrance Plate3.12:Packaging Source:Researcher’sfieldwork(2025) Source:Researcher’sfieldwork(2025) Plate3.10:Finishedgoodsstore Plate3.9:ControlUnit Source:Researcher’sfieldwork(2025) Source:Researcher’sfieldwork(2025) TheSite TobetterunderstandtheselectedsitefortheProposedModernRiceMill,directfield observations were carried out. This included evaluating the site’s topography, access, orientation, micro-climate, and environmental conditions. These assessments are essential to ensure accurate site data collection for effective design planning. SiteSelectionCriteria Several potential locations were identified and assessed using specific evaluation criteria. A weighing scale method was used to prioritize each site's suitability based on predefined factorssuch as accessibility, environmental impact, and proximity to raw material sources. ProposedLocations: 1. WamakkoLocalGovernmentArea Figure3.3:GoogleEarthMapViewShowingProposedSite Source:(GoogleEarth,2025) 2. ShagariLocalGovernmentArea Figure3.3:GoogleEarthMapViewShowingProposedSite Source:(GoogleEarth,2025) SelectionParametersandJustification: S/N Criteria Weight(10%) Wamakko(Score1– 5) Weight(10%) Shagari(Score1–5) 1 Proximitytomajor markets 5 2 7 3 2 Accesstoroads&transportation 4 3 6 4 3 Availability of skilled labor 6 2 8 4 4 Electricity and infrastructure 4 3 7 3 5 Water supply availability 7 3 9 2 6 Land availability &cost 5 2 6 4 7 Climaticsuitability 6 3 7 3 8 Securityandsocial stability 4 3 6 4 9 Proximity to rice farming zones 6 2.5 8 4 10 Governmentsupport & incentives 5 3 8 4 Total Weighted Score(1- 5) 2.5 4 SiteLocation The chosen site is within Wamakko Local Government Area of Sokoto State, Nigeria. Tools like Google Maps, urban development plans, and town planning maps were used to analyze adjoining land use patterns, current infrastructure, and future development potential in the area. SiteAnalysis A detailed site analysis was carried out to examine both natural and man-made characteristics ofthe location. This includes: I. SocialandHistoricalContext II. EnvironmentalandClimaticConditions III. RegulationsandPolicies IV. ExistingInfrastructure The purpose was to understand how these factors affect the design and performance of theproposed rice mill. The findings were supported using diagrams, sketches, and maps to clearly communicate site potentials and limitations. KeySiteElementsAssessed: i. Physicalinfrastructureinventory ii. Naturalfeaturesandmicro-climate iii. Vegetationcover iv. Geologicalstructure v. Soilcharacteristics vi. Topographicallayout vii. Hydrologicalfeatures SitePlanningConsiderations Approaching the design of a Rice Mill with emphasis on ventilation, several planning and design considerations were made to achieve the aim stated in chapter one of this project. These considerations include the following: I. Buildingorientation:Thesiteisplannedtomaximizevisualappreciation.Inotherto achievecomfortinthebuiltenvironment,thebuildingswereorientedtonortheastdirection totakeadvantageofthewindandminimizeheatgainfromthesun.Themainbuildings, which consist of the Administrative Offices and Production Unit. II. Ventilation:Intheprocessofthedesignlargewindowsareprovidedinordertomaximize the amount ofair coming into the production hall as well asother buildings within the ricemill. Exhaust fans were also provided in the production hall, to serve as additional means of ventilation. III. Circulation: The entrance in to the rice mill is different from the exit. The idea behind this issothattrucksoffloadingwon’tbestuckintrafficwithothertruckthatareloadingandready to exit the factory. Other buildings giving support to the main buildings are also linked with walkwaystappedfromthemajorwalkway.Majorwalk-waysaredesignedtofollow vehicular access to control pedestrian. IV. Zoning: The Production Hall is located at the back of the site because of noise pollution andthe smell from boiling Rice. While the administrative block and restaurant and mosque are located at the front of the site. SiteDesignConsiderations 1. SolarOrientation Thisreferstohowthericemillbuildingispositionedtotakeadvantageofsunlight.In Wamakko's hot climate, the design must minimize direct sunlight on working areas, using proper roof orientation and shading devices to reduce heat gain. Figure3.3:ViewShowingSolarOrientation Source:Google(2025) 2. WindOrientation Understanding the prevailing wind direction is key for natural ventilation. Aligning the rice mill openings (windows, vents) along the wind path can help remove heat and dust, improving indoorair quality and reducing reliance on mechanical cooling. Figure3.3:ViewShowingSolarOrientation Source:Google(2025) 3. SoundOrientation In a Rice Mill, noise from machines can disturb nearby residential areas. The Production Hall should be oriented so that noisy sections face away from sensitive areas, or be soundproofed to control noise pollution. Figure3.3:ViewShowingSoundOrientation Source:Google(2025) 5. TerrainOrientation Thericemillshouldbeplacedongentlyslopinglandtoalloweasydrainageandreduceflood risk. Wamakko’s topography supports this with suitable terrain available for industrial use. z Figure3.3:ViewShowingTerrainOrientation Source:Google(2025) 6. ExistingFeatures These include nearby roads, trees, water bodies, and power lines. They must be preserved or integrated into the design. For example, Neem trees naturally found in Wamakko can provideshade and reduce dust. 7. SiteOpportunitiesMap A visual diagram showing where to place buildings, driveways, water tanks, staff quarters, and green spaces based on the site’s strengths (e.g., shade areas, wind corridors, access roads). 8. Landscaping Landscaping helps cool the environment, reduces dust, and improves aesthetics. Planting trees or using green belts around the rice mill helps control the dry, dusty air common in Sokoto. 9. LocationofUtilities Electricity, water supply, and waste disposal areas should be carefully located to support mill operations.Forinstance,processingareasmustbeclosetowatersources,andwastezones should be placed downwind. 10. BuildingLines These are the setbacks from property boundaries or roads, ensuring safety and proper spacing. Following town planning regulations for industrial zones in Sokoto is essential. The standard dimensions for Rice Mill setback is 15 to 20 metres from the main building . Figure3.3:ViewShowingBuildingLinesOrientation Source:Google(2025) 11. IngressandEgress Referstoentryandexitpointsforbothvehiclesandpeople.Thedesignshouldprovidewide, clear access roads for rice delivery trucks, emergency vehicles, and smooth circulation within the site. Figure3.3:ViewShowingIngressandEgress Source:Google(2025). DataAnalysis Information gathered from field surveys, maps, climate records, and observations was analyzedand presented using charts, graphs, tables, and visual documentation. These tools were used to clearly present the site’s strengths and weaknesses, helping shape the proposed design. ConclusionsforDesignImplementation Theconclusionsdrawnfromthesitestudiesandanalysisguidethearchitecturaldesignofthe TheProposedRiceMill.Propersiteplanninganddesignconsiderationsensureabalance between zoning, safety, ventilation, access, and sustainability. These strategies aim to improve functionality, support productivity, and provide a healthy environment for workers—especially important in Sokoto’s high-temperature conditions. ` CHAPTERFOUR:DESIGNREPORT/RESULTS Introduction This chapter presents the design report, results, and discussions for the Proposed Modern Rice Mill in Wamakko , Sokoto State. The report highlights the design brief, space requirements, site location, and planning principles that guided the concept development. Furthermore, it outlinesthe design characteristics, choice of construction materials, and proposed landscaping andexternal works to ensure that the project responds effectively to the identified needs, climatic conditions, and functional requirements. DesignBrief TheneedforventilationinanyRiceMillingFactorydesignisofverybigimportance.The design brief seeks to create a design that will proffer design considerations for ventilation in the Rice Mill. The brief development further expatiate the major units into smaller sub units under each category which are as follows: 1. AdministrativeUnits i. Reception ii. GeneralManager’sOffice iii. ManagingDirector’sOffice iv. FinanceOffice v. Marketer’sOffice 2. ProductionUnits i. RawMaterialStore ii. ProductionHall iii. FinishedGoodsStore iv. Boiler/DrierUnit v. Laboratory vi. MaleandFemaleChangingRoom vii. Maintenance viii. Conviniences 3. AuxiliaryUnit i. ParkingArea ii. SecurityHouse iii. Generatorhouse iv. Clinic v. Resturant vi. Mosque SpaceRequirements The Design of Modern Rice Mill requires careful planning of functional spaces to ensure smooth workflow, safety and efficiency. The following areas and their approximate space allocations are considered; S/N Unit(s) Dimension (mm) Area(m2) No. Req. Total Area(m2) 1 Reception 4000*4000 16m2 1 16m2 2 General manager’sOfficer 4000*4000 16m2 1 16m2 3 Managing Director’sOfficer 3000*4000 12m2 1 12m2 4 Finance Office 3000*4000 12m2 1 12m2 5 Marketer’sOffice 4000*4000 16m2 1 16m2 6 Raw Material Store 20000*20000 400m2 1 400m2 7 Finished Goods Store 20000*20000 400m2 1 400m2 8 ProductionHall 45000*20000 900m2 1 900m2 9 Boiler/DrierUnit 10000*10000 200m2 1 200m2 10 Laboratory 4000*5000 20m2 1 20m2 11 Male Changing Room 4000*5000 20m2 1 20m2 12 FemaleChanging Room 4000*4000 16m2 1 16m2 13 Maintenance 5000*4000 20m2 1 20m2 14 SecurityHouse 4000*3000 12m2 2 12m2 15 Generator House 3000*2500 7.5m2 1 7.5m2 Table4.1:ScheduleofAccommodation Source:(Researcher,2025) SiteLocation The site for the Proposed Modern Rice Mill Is located at gidan Kara of Wamakko, Sokoto State, alongside Kalambaina road. Figure4.3.1:MapofNigerian Source:(Wamakkoetal.,2025) Figure4.3.2:MapofSokotoStateshowing23LocalGovernmentsofSokotoState Source:(Nigeriagalleria,2025) Figure4.3.3:WamakkoMetropolisRoadMap Source:(SafiyanuG.Y.etal.,2025) Figure4.3.4:GoogleEarthViewShowingtheProposedSite Source:(GoogleEarth,2025) PlanningPrinciples/Considerations Approaching the design of a Rice Mill with emphasis on ventilation, several planning and design considerations were made which include the following order : Buildingorientation: The site is planned to maximize visual appreciation. In other to achieve comfort in the built environment, the buildings are oriented in the northeast direction to take advantageofthewindwhichminimizeheatgainfromthesun.Themainbuildings,which consists of the administrative offices, production unit, restaurant, clinic and mosque. Circulation:theentranceintotheRiceMillisdifferentfromtheexit.Theideabehindthisis thattrucksoffloadingwon’tbestuckintrafficwithothertrucksthatareloadingandreadyto exit the factory. Other buildings giving support to the main buildings are also linked walkways tapped from the major walkway. Major walk-ways are designed to follow vehicular access to control pedestrian. Zoning: the production hall is located at the back of the site because of noise pollution and the smell from boiling rice. While the administrative block and restaurant and mosque are located atthe front of the site. ConceptandDesign TheConceptofthericemillisinspiredbytheU-shapearrangementoftheproductionhall, where machine operations define the flow of space. This layout not only organizes processes sequentiallybutalsoenhancesnaturalventilation,facilitatessupervisionandcreatesa functional yet aesthetic form that reflectsefficiency in design . SitePlan ShowstheoveralllayoutoftheProposedRiceMill,includingbuildings,accessroads, circulation, drainage, and landscape features. Figure4.5.1:SitePlanoftheProposedModernRiceMilllSource:(Researcher,2025) FloorPlan Thefloor planof theProposedModernRiceMillDisplaystheflowofmaterialsfromrawpaddy to finished ricedispatch, internal spatialorganization, zoning for milling activities,offices, storage, and circulation paths. Figure4.5.2:FloorPlanoftheProductionUnit Source:(Researcher,2025) RoofPlan Top view of the roofing system with slopes and ridges for ventilation and effective rainwater drainage. Figure4.7:RoofPlanoftheProductionUnit Source:(Researcher,2025) Sections Cut-throughdrawingshowingspatialarrangement,floorlevels,heights,andnatural light/ventilation flow. . Figure4.8:SectionsoftheProductionUnit Source:(Researcher,2025) FrontElevation Depicts the main façade with the entrance, shading devices, and openings designed for ventilation and climate response. Figure4.5.5:FrontElevationoftheProductionUnit Source:(Researcher,2025) RearElevation Illustrates the back façade with service zones, secondary access, and ventilation openings for processing spaces. Figure4.5.6:BackElevationoftheProductionUnit Source:(Researcher,2025) LeftElevation Complements the Right side, highlighting symmetry, shading devices, and roof details for climate adaptation. Figure4.5.7:LeftElevationoftheProductionUnit Source:(Researcher,2025) RightElevation Sideviewshowingwalltreatment,openings,androofslopedesignedforheatcontrolandventilation. Figure4.5.8:RightElevationoftheProductionUnit Source:(Researcher,2025) 3DView/Perspective The 3D perspective illustrates the overall form, massing, and spatial character of the rice mill. It gives a realistic impression of materials, colors, and finishes, while showing how the design interacts with the surrounding environment Figure4.5.8:ShowingtheExteriorperspectiveoftheTheRicemill Source:(Researcher,2025) DesignCharacteristics Theproposeddesignexhibitsthefollowingcharacteristics: i. Functionality:Spacesarrangedaccordingtoprocessingflow. ii. Flexibility:Provisionforfutureexpansionofprocessingunits. iii. Durability:Useoflocallyavailablebutlong-lastingmaterials. iv. Aesthetics:Simplebutmodernindustrialdesignwithlandscapeintegration. v. ContextualRelevance:Respectforlocalclimateandsocio-economicrealities. MaterialsandMethodsOfConstruction Bothindigenousandmodernbuildingmaterialswillbeusedintheconstructionofthe building.Themainbuildingmaterialusedishydraformadobeblockswithasupporting system of concrete beams and columns. Steel has been used as the major roof truss element on the production buildings. This is because of its rigidity and strength to stand the test of time. Aluminum roofing sheet on steel frame would be used for the roofing system and laminated timber was also used for the trusses for the administrative area. While translucent ETFEmaterialfortheskylightandLowEmissivityGlazingforthewindowswhichreducethe amount of heat penetrating into the building and stone tiles on the elevation to prevent heat absorption. This being a bioclimatic Centre, renewable materials should be used forconstructionsoastocreateaconnectionbetweenthebuildingandthenaturalenvironment. For thisreason,hydra formadobe blockswheredominantlyuseddue totheir durablenature and is well proven building material possessing excellent properties in terms of appearance, thermalandacoustic insulationaswellasfireandweatherprotection.Thestructuralsystemis a concrete frame structure with steel roof members in some of the buildings. Foundation:Thefoundationofabuilding,itssubstructurehasacriticallinkinthetransition of the building load to the ground directly on the soil. The foundation system must distribute vertical loads and hold the super structure of the building against uplift and racking forces. Because of the nature of the soil in the proposed site, raft Foundation would be used for the structure. Wall: walls shall be constructed of hydra form adobe blocks; internal partitions in addition to sand Crete blocks will also employ the use plywood, aluminum panels among others. Doors:External doors most especially the entrance shall be metal detector door while some other internal doors will be of timber-paneled doors and a sliding-glass doors and glass for partitioning. Windows:WindowsTranslucentETFEmaterialforthedomeandLowEmissivityGlazing for the windows which reduce the amount of heat penetrating into the building. FloorandFinishes: Floor shall be of screed floor, marble, clay tiles and wood floor finishes depending on the location. The floor finish to be used in workshop, administrative andrestaurantspacesisgranolithicfloorbecauseofitsdurabilityanditsresistancetowearand tear. Roof:Roofs used in the structures shall be of light-colored aluminum sheets, metro tiles, expandable polystyrene concrete roof, green roof and concrete decking. LandscapeandExternalWorks The landscape of the site will be made up of two categories the soft and hard landscapeelements. The soft taking about 55-65% of the remaining 35% is for hard landscape, enteringthe site from the South gates, upfront is the administrative building structure while just before the entrance gate is the parking space of the proposed center. For pedestrians, walkways are being created to ease movement of shortest possible distance to other facilities on site by usersortrainees.Muchgreeneryandtreesexistclosetothebuildingtoconstantlymaintainfresh airinthebuilding.Guttersbesidetheroadsandwalkwaysdrainthesiteandaredirectedout of the site through the south-west direction. Figure4.5.1:SitePlanoftheProposedModernRicemill Source:(Researcher,2025) CHAPTERFIVE SUMMARY,CONCLUSIONANDRECOMMENDATION Summary This project examined methods/strategies of enhancing cross and effective ventilation in Rice Milling Factory Design. Research was carried out on Architectural design requirements of aRice Mill in order to achieve the project aim and objectives. It is properly documented to integrate planning principles and strategies of enhancing ventilation in the design so as to improve effective ventilation in the factory and reduce heat from the machines in order to provide a safe and stable working environment for the workers. Case studies, interviews and pictures during local case studies, books and journals were used as methods of data collection during the process of this research. Conclusion As mentioned earlier, this project is aimed at achieving effective ventilation in Rice Milling Factory design for Wamakko local Government. During the process of the design all research questions were answered, objectives and aim were achieved. The findings of this thesis werethatthechallengesfacedbyRiceMillingFactorythatledtopoorperformanceofmachines and lack of ventilation in Rice Mill. In conclusion the design effectively considered theexcessiveneedforventilationinRicemill,byusingsomeplanningprinciplesandstrategies in design as a tool to architecturally solve this problem. Recommendations Considering the findings from this study,the following recommendations can be made in orderto increase the cross andeffective ventilation of the Sokoto State Rice Milling Factory: o Plantationoftreesshouldbetakenveryseriousandshouldbedoneattheearlieststage of construction. By doings so, at the time of completion of the project, the trees would have grown thereby providing adequate ventilation to the buildings. o Building orientation is also one of the strategies of ventilation that is neglected in this region.Itcanbeused toinfluenceairinflux intobuildingsby orienting the sidewith most window openingstoface thenortheast axisor southwestwhichare the axis in which wind travels. o Mechanical means of ventilation should not be ignored. Like exhaust fans especially in industrial designs. They help in reducing negative air (hot) and cooling the interior of buildings REFERENCES Accountlearning.com. (2025). Factors to be Considered in Planning Factory Building.Retrieved September 20, 2025 from https://accountlearning.com/factors-considered-planning-factory-building Anonymous. 1997a.Researchhighlights.In NigeriaAgriculturalResearch Project(NARP)WorldBankAssisted1997 Annual Report, p. 3. Atanda.O.A.,Ayotade,R.A.,Fagade,S.O.,Awoderu,V.A.&Olufowote,J.O. 1978. Nigeria. In I.W. Buddenhagen and G.J. Persley, eds. RiceinAfrica:ProceedingsofaConferenceheldattheInternationalInstituteofTropicalAgriculture, p. 338-339. Ibadan, Nigeria, 7-11 Mar. 1977 Ezedinma, C. 2005. Impact of Trade on Domestic Rice Production and the Challenge of Self-Sufficiency in Nigeria. Ibadan, Nigeria: International Institute of Tropical Agriculture. Accessed on December 5, 2016. http://africarice.org/workshop/RicePolicy/Chuma.E/Chuma.E.Nigeria.Paper.pdf Hardcastle, J.E.Y. 1959 The Development of rice production and research in the Federation of Nigeria. Trop.Agric. (Trinidad), 36: 79-95. Hawksworth,D.L.1985.Foreword.InS.H.Ou,ed.Ricediseases.CMISlough,UK,CAB. 380pp. Johnson, Michael and Akeem Ajibola. 2016. “Post-harvest Processing, Marketing, and CompetitivenessofDomesticRice.”InGyimah-Brempong,Kwabena,Michael Johnson and Hiroyuki Takeshima (eds.), The Nigerian Rice Economy: Policy Optionsfor Transforming Production, Marketing and Trade. Philadelphia: University of Pennsylvania Press. Lançon, Frederic; Olaf Erenstein; S.O. Akande; S.O. Titilola; G. Akpokodje; and O.O. Ogundele. 2003a. Imported Rice Retailing and Purchasing in Nigeria: A Survey. West Africa Rice Development Association (WARDA) and Nigeria Institute for Social Economic Research (NISER), Cotonou, Benin. Accessed on December 5, 2018.http://pdf.usaid.gov/pdf_docs/Pnadb848.pdf NigeriaGalleria.(2025).SokotoState,Nigeria.RetrievedSeptember02,2025from https://www.nigeriagalleria.com/Nigeria/States_Nigeria/Wamakko/ Nex Flow Company. (2025). Retrieved September 15, 2025 from https://www.nexflow.com/blog/commonly-used-tools-industrial-ventilation/ Singh,B.N.,Fagade,S.,Ukwungwu,M.N.,Williarn,C.,Jagtap,S.S.,Oladimeji,O.,Effisue, A. & Okhidievbie, O. 1997. Rice growing environments and biophysical constraints in different agroecological zones of Nigeria. Met.J., 2(1): 35-44. Waterlinecooling.com. (2025). Factory Cooling and Industrial Ventilation Solution Retrievedfrom. https://www.waterlinecooling.com/en/wall-exhaust-fans/ Weather Spark. (2025). Climate and Average Weather Year round in Wamakko, Sokoto State, Nigeria. Retrieved September 5, 2025 from https://weatherspark.com/y/50099/Average-weather-in-Wamakko-Nigeria-Year-Round