2006•Water Science & TechnologyRequires access

Biological phosphorus removal with nitrite as election acceptor

Xiaoling Zhang, Zhiying Wang, Qing Zhao

Abstract

Biological phosphorus removal was studied in a sequencing batch reactor (SBR). The results showed that nitrite could be used as electron acceptor in denitrifying phosphorus removal. Feed mode of nitrite had significant influence on denitrifying phosphorus removal. Anoxic phosphorus assimilation rate could reach 10.44 mgP/gSS.h and the percentage of anoxic phosphorus assimilation amount was more than 97% with continuous feed mode. Granular sludge with denitrifying phosphorus removal activity was found in the SBR. The effects of different operational conditions, such as COD loading, settling time, HRT etc., on the formation of granules were also studied.

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Available abstract

Key concepts: Denitrifying bacteria, Anoxic waters, Phosphorus, Nitrite, Sequencing batch reactor, Chemistry, Enhanced biological phosphorus removal, Assimilation (phonology)