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Effects of Abattoir Wastes on Ammonium and Nitrite Consumptions in a Tropical Fresh Water Ecosystem

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Author(s): J.C. Orji | C.O. Nweke | R.N. Nwabueze | B.N. Anyanwu | L.O. Chigbo | C.E. Nwanyanwu

Journal: Journal of Environmental Science and Technology
ISSN 1994-7887

Volume: 4;
Issue: 6;
Start page: 590;
Date: 2011;
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Keywords: sodium chlorate | nitrite | heterotrophs | autotrophs | ammonium | Allyl thiourea

ABSTRACT
Despite the attendant environmental consequences, direct discharge of untreated waste water from industries into water bodies is common in many developing countries. This study evaluates the impact of abattoir wastes on microbial ammonium and nitrite consumptions in a tropical fresh water ecosystem. Samples were collected from points (source point, upstream and downstream) about 300 m apart. Autotrophic and heterotrophic ammonium and nitrite consumptions were estimated by incorporation of allyl thiourea and sodium chlorate, inhibitors of autotrophic ammonium and nitrite oxidations, respectively. Source point sample was the most turbid, richer in nutrients and microbial populations than the upstream and downstream samples. Ammonium and nitrite consumption patterns were active at the upstream and downstream stations. Autotrophic ammonium consumption was completely repressed while autotrophic and heterotrophic nitrite consumptions were very active at the source point. Correlations between ammonium and nitrite consumptions at the various sampling points were negative (r = -0.96) for autotrophs at the source point, and positive (0.96

Tango Jona
Tangokurs Rapperswil-Jona

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