SCREENING OF BACTERIOLOGICAL PROFILE OF LAUNDRY MACHINE WASH WATER IMPACTED SOIL
Abstract
ABSTRACT
Screening of bacteriological profile and physicochemical properties of laundry machine wash water impacted soil was studied. Five (5) samples of impacted soil with laundry machine wash water and laundry machine wash water each were obtained from different locations within Ikot Osurua community designated and analyzed by standard microbiological procedures. IS1, IS2, IS3, IS4, IS5 and WW1, WW2, WW3, WW4, WW5. The results obtained revealed total bacterial counts of 2.36x107, 2.62x107, 2.56x107, 2.54x107 and 2.15x107cfu/g for Samples IS1, IS2, IS3, IS4, and IS5. Samples WW1, WW2, WW3, WW4 and WW5 had 1.59x107, 1.91x107, 1.88x107, 1.78x107 and 1.52x107 while Sample C (control) had 1.05x107cfu/g respectively. The bacteria identified were Staphylococcus sp., Bacillus sp., Escherichia sp., Enterobacter sp., Corynebacterium sp., Pseudomonas sp. and Citrobacter sp. The percentage occurrence of the bacterial isolates from laundry water impacted soil revealed that Bacillus sp. recorded the highest percentage occurrence of (19.20%) followed by Corynebacterium sp. (18.15%), Pseudomonas sp. (15.74%), Enterobacter sp. (14.23%), Escherichia sp. (12.95%), Citrobacter sp. (10.69%) while Staphylococcus sp. had the least percentage occurrence of (9.04%) respectively. The percentage occurrence of the bacterial isolates from laundry wash water revealed that Staphylococcus sp recorded the highest percentage occurrence of (18.92%) followed by Pseudomonas sp (17.4%), Enterobacter sp (17.1%), Escherichia sp (16.6%), Bacillus sp (15.3%) while Citrobacter sphad the least percentage occurrence of (14.7%) respectively. The physiocochemical properties of laundry wash water and the impacted soil samples revealed pH, temperature, density, salinity and electrical conductivity; 7.520±0.057, 29.450±0.1410C, 1.299±0.004 g/cm3, 1.641±0.004 mg/l and 315.070±0.004 µs/cm, for laundry machine wash water and 7.635±0.070, 29.050±0.1410C, 2.509±0.025 g/cm3, 0.045±0.014 mg/l and 125.250±0.722 µs/cm for impacted soil respectively. The study suggests that the soil in contact with laundry machine effluent serves as a reservoir for diverse bacterial populations, potentially due to the accumulation of organic matter and nutrients from the wash water. Therefore, the need for proper wastewater management and treatment strategies to reduce their environmental impact and public health risks.
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