Effects of acetate and nitrite addition on fraction of denitrifying phosphate-accumulating organisms and nutrient removal efficiency in anaerobic/aerobic/anoxic process

被引：15

作者：

Koichi Soejima

Kazuma Oki

Akihiko Terada

Satoshi Tsuneda

Akira Hirata

机构：

[1] Waseda University,Department of Chemical Engineering

[2] Research and Development Center,Mayekawa Mfg. Co. Ltd. Moriya Factory

来源：

Bioprocess and Biosystems Engineering | 2006年 / 29卷

关键词：

Enhanced biological phosphorus removal (EBPR); Anaerobic/aerobic/anoxic process (AOA process); Denitrifying phosphate-accumulating organisms (DNPAOs); Glycogen-accumulating organisms (GAOs); Sequencing batch reactor (SBR);

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The effects of acetate and nitrite on the performance of sequencing batch reactors (SBRs) employing an anaerobic/aerobic/anoxic (AOA) process were investigated. Three types of SBR operations were used: sodium acetate addition at the start of anoxic condition for heterotrophic denitrification (Type 1); sodium acetate addition at the start of aerobic condition for anoxic phosphate removal by denitrifying phosphate-accumulating organisms (DNPAOs) (Type 2: conventional AOA process); and nitrite addition at the start of aerobic condition for inhibition of phosphate-accumulating organisms (PAOs) (Type 3). A track experiment shows that Type 2 led to the best performance of SBRs among the three types. An analysis by fluorescence in situ hybridization (FISH) revealed that nitrite addition decreased the ratio of PAOs with a decrease in phosphorus removal efficiency. The fraction of DNPAOs in Type 2 was the highest at 13%, indicating that Type 2 is suitable for the simultaneous nitrogen and phosphorus removal in the AOA process.

引用

页码：305 / 313

页数：8

共 75 条

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