Effect of influent flow rate distribution on the performance of step-feed biological nitrogen removal process

被引：67

作者：

Zhu, Guibing

Peng, Yongzhen ^{[1
]}

Wang, Shuying

Wu, Shuyun

Ma, Bin

机构：

[1] Sch Municipal & Environm Engn, Harbin Inst Technol, Harbin 150090, Peoples R China

[2] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China

[3] Beijing Univ Technol, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100022, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2007年 / 131卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

activated sludge; biological nitrogen removal; C/N ratio; flow rate distribution; removal efficiency; step-feed process;

D O I：

10.1016/j.cej.2006.12.023

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The step-feed anoxic/oxic biological nitrogen removal process has been proposed as an attractive alternative for the conventional biological nitrogen removal process for the purpose of enhanced nitrogen removal. For step-feed process, the biological nitrogen removal efficiency is a function of influent flow distribution. In this study, the effects of influent flow rate distribution on the performance of nitrogen removal process were investigated. The effects of influent flow rate distribution on COD, ammonia, total nitrogen removal efficiency, nitrification rate and sludge volume index value were also studied. According to the performance characteristic of the step-feed process, the concept of influent flow rate distribution ratio was firstly introduced. The maximum influent flow distribution ratios under the condition of different influent C/N ratios were determined, respectively, by trial and error method. The experimental results showed that high total nitrogen removal efficiency, higher than 95%, could be achieved under certain influent flow rate distribution ratio without internal nitrate cycle or addition of external carbon source. It was obvious that nitrification rate of each stage under different influent flow distributions decreased along with the decreasing of sludge loading and volume loading in each stage, and the degree of reduction rise gradually with the increasing of influent flow distribution ratio. The sludge volume index value would also increase along with the increase of influent flow distribution ratio. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：319 / 328

页数：10

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