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Microbial Flocculants for Improving the Dewatering Capability of Sludge

Zhao Jihong, Jinfeng Yang, Qingning Wang, Congbin Liu

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Abstract

A new kind of flocculants -producing bacteria was isolated from activated sludge,and microbial flocculants produced by the strain under the optimal culture conditions was named M-127,which was used to improve the dewatering capability of sludge,and compared with PAM,PAC and Al(2SO)43. Results showed that settling capability of the sludge could be improved when M-127 dose was 2mg/L. Under the optimal dewatering conditions of microbial flocculants M-127 dose 40mg/L and pH 6.5,the resulting dewatering percentage reached 96.3%,greater than individual dose of PAM,PAC and Al(2SO4)3.

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What this paper is about

A new kind of flocculants -producing bacteria was isolated from activated sludge,and microbial flocculants produced by the strain under the optimal culture conditions was named M-127,which was used to improve the dewatering capability of sludge,and compared with PAM,PAC and Al(2SO)43. Results showed that settling capability of the sludge could be improved when M-127 dose was 2mg/L. Under the optimal dewatering conditions of microbial flocculants M-127 dose 40mg/L and pH 6.5,the resulting dewatering percentage reached 96.3%,greater than individual dose of PAM,PAC and Al(2SO4)3.

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Available abstract

A new kind of flocculants -producing bacteria was isolated from activated sludge,and microbial flocculants produced by the strain under the optimal culture conditions was named M-127,which was used to improve the dewatering capability of sludge,and compared with PAM,PAC and Al(2SO)43. Results showed that settling capability of the sludge could be improved when M-127 dose was 2mg/L. Under the optimal dewatering conditions of microbial flocculants M-127 dose 40mg/L and pH 6.5,the resulting dewatering percentage reached 96.3%,greater than individual dose of PAM,PAC and Al(2SO4)3.

Key concepts: Dewatering, Flocculation, Activated sludge, Settling, Pulp and paper industry, Chemistry, Sewage treatment, Environmental science

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