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TREATMENT OF ANAEROBICALLY DIGESTED EFFLUENT OF PIGGERY WASTEWATER USING TWO STEP-FEED SBR METHOD

Chen Bi-mei

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Abstract

Different treating approaches were adopted to obtain the best treatment of anaerobically digested effluent of piggery wastewater.The experimental results indicated that the CODcr and NH3-N of effluent after two step-feed sequencing batch reactor(SBR) treatment were lower than excess standard,except total phosphorus(TP).While the TP of effluent can be reached lower than 8 mg/L only by using two step-feed SBR accompanied with adding FeSO4.This implied FeSO4 acted as an effective phosphorus removal agent through setting out and flocculation.

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What this paper is about

Different treating approaches were adopted to obtain the best treatment of anaerobically digested effluent of piggery wastewater.The experimental results indicated that the CODcr and NH3-N of effluent after two step-feed sequencing batch reactor(SBR) treatment were lower than excess standard,except total phosphorus(TP).While the TP of effluent can be reached lower than 8 mg/L only by using two step-feed SBR accompanied with adding FeSO4.This implied FeSO4 acted as an effective phosphorus removal agent through setting out and flocculation.

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Available abstract

Different treating approaches were adopted to obtain the best treatment of anaerobically digested effluent of piggery wastewater.The experimental results indicated that the CODcr and NH3-N of effluent after two step-feed sequencing batch reactor(SBR) treatment were lower than excess standard,except total phosphorus(TP).While the TP of effluent can be reached lower than 8 mg/L only by using two step-feed SBR accompanied with adding FeSO4.This implied FeSO4 acted as an effective phosphorus removal agent through setting out and flocculation.

Key concepts: Effluent, Sequencing batch reactor, Phosphorus, Flocculation, Pulp and paper industry, Wastewater, Chemistry, Sewage treatment

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