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Short-cut Nitrification and Simultaneous Nitrification and Denitrification in SBR at Low DO

Zhiying Wang

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Abstract

Study was made on the characteristics and control condition of short-cut nitrification in SBR at low DO,and the effect of carbon source concentration and dosing mode on efficiency of simultaneous denitrification.The results showed that to maintain environment in which high and low DO occur alternately is the key to achieving short-cut nitrification.When NH~+_4-N is 300 mg/L and COD 400 ～ 600 mg/L in influent ,use of semi-continuous dosing of carbon source can guarantee simultaneous denitrification efficiency up to 80%.

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What this paper is about

Study was made on the characteristics and control condition of short-cut nitrification in SBR at low DO,and the effect of carbon source concentration and dosing mode on efficiency of simultaneous denitrification.The results showed that to maintain environment in which high and low DO occur alternately is the key to achieving short-cut nitrification.When NH~+_4-N is 300 mg/L and COD 400 ～ 600 mg/L in influent ,use of semi-continuous dosing of carbon source can guarantee simultaneous denitrification efficiency up to 80%.

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Available abstract

Study was made on the characteristics and control condition of short-cut nitrification in SBR at low DO,and the effect of carbon source concentration and dosing mode on efficiency of simultaneous denitrification.The results showed that to maintain environment in which high and low DO occur alternately is the key to achieving short-cut nitrification.When NH~+_4-N is 300 mg/L and COD 400 ～ 600 mg/L in influent ,use of semi-continuous dosing of carbon source can guarantee simultaneous denitrification efficiency up to 80%.

Key concepts: Nitrification, Simultaneous nitrification-denitrification, Denitrification, Carbon source, Chemistry, Environmental engineering, Carbon fibers, Environmental science

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