Influence of aeration and sludge retention time on ammonium oxidation to nitrite and nitrate

被引：266

作者：

Pollice, A

Tandoi, V

Lestingi, C

机构：

[1] CNR, Ist Ric Sulle Acque, I-70123 Bari, Italy

[2] CNR, Ist Ric Sulle Acque, I-00198 Rome, Italy

来源：

WATER RESEARCH | 2002年 / 36卷 / 10期

关键词：

nitritation; partial nitrification; ammonium oxidation; autotrophic bacteria; nitrite;

D O I：

10.1016/S0043-1354(01)00468-7

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Partial nitrification to nitrite was reported to be technically feasible and economically favourable, especially when wastewater with high ammonium concentrations or low C/N ratios are treated. Nitritation can be obtained by selectively inhibiting nitrite oxidizing microrganisms through appropriate regulation of the system's pH, temperature, and sludge retention time. In addition to already known methods, the work showed that aeration patterns may play a relevant role too. Nitrification tests were performed in two lab-scale reactors operated under continuous and intermittent aeration, respectively. In both plants, temperature was maintained at 32degreesC and pH was regulated at 7.2 by providing external buffer capacity when needed. The results showed that partial nitrification to nitrite was steadily obtained under oxygen limitation, independent of the sludge age. Therefore, the aeration pattern is proposed as an alternative parameter to the sludge retention time for controlling ammonium oxidation to nitrite. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：2541 / 2546

页数：6

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