Physico-chemical and microbial characterisation of abattoir waste water: Environmental Impact and Health Concern.
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Faculty of Applied Sciences and Technology, IBB University, Niger State, Nigeria
Slaughtering of animals to supply meat for human consumption in abattoirs is a common practice in Nigeria. In large cities such as Lagos, most of the abattoirs are located in close proximity to residential built up areas. This study investigates the impact of abattoir wastewater on the quality of surrounding underground waters and the health of residents in their vicinity using Agege and Surulere abattoirs as a case study. Physico-chemical and microbiological analyses were carried out on abattoir wastewater and surrounding underground using standard analytical methods. The study went further to investigate the effect of abattoir operations on health of residents in the abattoir vicinity using questionnaire. The ranges of the physico-chemical parameters studied in Agege abattoir were as follows: pH 3.8 - 4.6, Temperature 28.9ºC – 29.9ºC, Dissolved oxygen 6.50mg/l – 11.43mg/l, BOD 85.20mg/l – 618.82mg/l, Total Solids 1326.53mg/l – 2225.46mg/l, Total dissolved solids 226.05mg/l – 618.82mg/l, Total suspended solids 1030.04mg/l – 1606.58mg/l and Turbidity of 12.1 – 87.4 NTU. While in Surulere abattoir, physico-chemical parameters ranges were; pH 3.7 - 4.9, Temperature 28.9ºC – 29.9ºC, Dissolved oxygen 7.02mg/l – 12.32mg/l, BOD 87.21mg/l – 110.40mg/l, Total Solids 1221.10mg/l – 2322.50mg/l, Total dissolved solids 380.19mg/l – 1025.39mg/l, Total suspended solids 1020.01mg/l – 1707.88mg/l and Turbidity of 12.0 – 70.5 NTU. The values for most of the parameters were very high and were above the WHO and FMEnv standards. The total viable bacterial count ranged from 1.80 × 105 – 3.10 × 105 cfu/ml for Agege and 1.80 × 105 – 3.10 × 105 cfu/ml for Surulere abattoir. Total fungi count ranged from 2.0 × 103 – 3.10 × 103 cfu/ml and 1.80 × 103 – 3.10 × 103 cfu/ml for Agege and Surulere abattoir respectively. The bacteria genera isolated were: E.coli, Bacillus spp, Klebsilla spp, Staphylococcus aureus, Clostridium spp., and Pseudomonas spp. The fungi genera isolated include Aspergillusniger, Fusarium spp., Mucor spp., Saccharomyces spp. and Penicillium spp. The result showed that the air quality around the abattoir was grossly polluted. Excessive coughing, diarrhoea and eye itching were reported among the residents. Also, recreational activities around the abattoir was absent because of the odour emanating from the abattoir wastes. The findings in this study underscored the need to treat abattoir wastewater rather than discharging it into the environment and the abattoir should be built away from residential areas.
abattoir , bacterial count , fungi , physico-chemical parameters , wastewater , Research Subject Categories::NATURAL SCIENCES::Chemistry
Oluseyi, T.O, Folarin, B.T and M. M. Adaramaja (2019). Physico-chemical and microbial characterisation of abattoir waste water: Environmental Impact and Health Concern. Development Journal of Science and Technology Research (DJOSTER), Vol.8(1): 38 – 44. Publisher: Faculty of Applied Sciences and Technology, IBB University, Niger State, Nigeria