Nitrogen removal from domestic wastewater using immobilized bacteria

被引：15

作者：

Takizawa, S ^{[1
]}

Aravinthan, V ^{[1
]}

Fujita, K ^{[1
]}

机构：

[1] SAITAMA UNIV,DEPT CIVIL & ENVIRONM ENGN,URAWA,SAITAMA 338,JAPAN

来源：

WATER SCIENCE AND TECHNOLOGY | 1996年 / 34卷 / 1-2期

关键词：

anoxic reactor; bacteria immobilization; denitrification; nitrification; nitrogen removal; oxic reactor; polypropylene pellets;

D O I：

10.1016/0273-1223(96)00532-X

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Two bench-scale Runs, namely Run A and Run B, have been investigated in order to study the effect of immobilized bacteria on denitrification in anoxic-oxic process. The hollow polypropylene pellets (O.D. 4 mm, I.D. 3 mm, nominal density 1.001 g/cm(3)) have been dosed into the anoxic reactor in Run A up to 24% of the volume. Run B was operated with no pellets in the anoxic reactor as a control experiment. Both Runs A and B contained the above pellets in the oxic reactor for a total volume of 24%. Run A showed superiority in nitrogen removal (73%) compared to Run B (65%) at a loading of 0.219 kgN/m(3).d for a detention time of 4 hours at 15 degrees C. By further investigating into the mechanism of nitrogen removal, it was concluded that the immobilized bacteria in the anoxic reactor in Run A enhanced not only the denitrification but also the ammonification that resulted in higher nitrogen removal efficiency. Copyright (C) 1996 IAWQ.

引用

页码：431 / 440

页数：10

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