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Treatment efficiency and economic benefit of Zartech poultry
slaughter house waste water treatment plant, Ibadan, Nigeria
Yahaya Mijinyawa1 and Nurudeen Samuel Lawal2
1Department
of Agricultural and Environmental Engineering, Faculty of
Technology, University of Ibadan, Nigeria.
2Agricultural
Division, Zartech Limited, Oluyole Industrial Estate, Ibadan,
Nigeria.
*Corresponding author. E-mail:
mijin1957@yahoo.com.
Accepted
18 February, 2008. |
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The efficiency of the poultry wastewater treatment plant of
Zartech Limited, Ibadan, Nigeria, was assessed based on
percentage reduction of the various water contaminants while
the unit cost of treated water was compared with that
supplied through tankers. Wastewater and treated water
samples were respectively collected from the points of
generation and release after treatment for laboratory
analysis for biochemical oxygen demand (BOD), chemical
oxygen demand (COD), total suspended solids (TSS), oil and
grease, nitrate, phosphate and pH. The values for BOD, COD,
TSS, oil and grease, nitrate and phosphate obtained for the
wastewater were 1680, 5199, 7125, 1266, 70.0 and 6.8 mg/l,
as against 22.8, 15.6, 0, 15.2, 0 and 0 mg/l, respectively,
for the treated water. This translates to treatment
efficiencies in percentages of 98.7, 99.7, 100.0, 98.8,
100.0 and 100.0 for BOD, COD, TSS, oil and grease, nitrate
and phosphate, respectively. The pH of the wastewater was
6.7 as against 7.2 for the treated water. Based on the
results obtained, the plant was adjudged efficient for the
treatment of poultry wastewater. The cost of treated water
was
₦0.18/l
compared with
₦0.50/l for that supplied through tankers, resulting in a daily savings of
about
₦120,506.95. Further cost reduction can be achieved through
adjustment of dozing pumps.
Key
words:
Pollution, poultry, slaughter house, treatment, wastewater. |
