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The efficacy of chitosan obtained from Nigerian snail shell for the treatment of waste water effluent

H.C.C. Maduka, C.E. Ugwu, A.N. Okpogba, P.N. Ogueche, J.A. Otokpa, C.O. Okonkwo

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J. Bio. Env. Sci.7(4), 9-15, October 2015

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Abstract

The search for a better alternative for conventional coagulants has become an important challenge in water treatment processes, with the aim of reducing health effects associated with the use of inorganic coagulants. The aim of the study was to evaluate the effectiveness of snail shell chitosan as a coagulant in waste water treatment. Chitin was prepared from snail shell after grinding by demineralization, deproteinization and decolorization. Chitosan was obtained by alkaline deacetylation of chitin. The results showed a reduction in turbidity, conductivity, total suspended solids, total dissolved solids and total solids, respectively. The snail shell chitosan decreased the biological oxygen demand and chemical oxygen demand while increasing the dissolved oxygen. The nitrate and sulphate were also reduced while phosphate was almost completely removed. It can be concluded from the results obtained that the snail shell chitosan is an effective coagulant in the treatment of waste coloured water effluent.

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The efficacy of chitosan obtained from Nigerian snail shell for the treatment of waste water effluent

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