Effects of feed water C/P ratio on performance of anaerobic-anoxic-oxic process

WANG Xiaolian; WANG Shuying; PENG Yongzhen

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Effects of feed water C/P ratio on performance of anaerobic-anoxic-oxic process

更新时间：2025-12-10

- Effects of feed water C/P ratio on performance of anaerobic-anoxic-oxic process
- CIESC Journal Issue 9, Pages: 1765-1770(2005)
- 作者机构：
  
  北京工业大学北京市水环境恢复重点实验室,北京,100022
- 作者简介：
- 基金信息：
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- Online First：25 September 2005，
  
  Published：25 September 2005
- 稿件说明：
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WANG Xiaolian, WANG Shuying, PENG Yongzhen. Effects of feed water C/P ratio on performance of anaerobic-anoxic-oxic process[J]. CIESC Journal, 2005, (9): 1765-1770.
DOI：

WANG Xiaolian, WANG Shuying, PENG Yongzhen. Effects of feed water C/P ratio on performance of anaerobic-anoxic-oxic process[J]. CIESC Journal, 2005, (9): 1765-1770. DOI：

摘要

我国当前面临着严重的水体富营养化问题，A2/O工艺是一种有效的同步脱氮除磷工艺，但其中进水C/P比是其运行效果的重要影响因素，为深入考察不同进水C/P比对A2/O工艺运行性能的影响，试验设计了4种进水C/P比 (55、45、34、23)，研究了A2/O工艺中COD、总氮、磷和污泥特性的变化.实验结果表明，当进水C/P比小于32时，磷的去除效果随C/P比的降低而线性降低;当进水C/P比高于32时，磷的去除效果稳定在90%～98%，出水磷浓度小于0.5 mg8226;L-1.但是C/P比的变化，对COD和总氮的去除率影响较小，平均去除率分别高于90%和75%.而剩余污泥中磷含量则随C/P比的下降而增加.实验发现，不同C/P比系统均存在反硝化除磷现象，可以实现“一碳两用”，有利于氮磷去除效果的提高.

Abstract

With the deterioration of eutrophication in China

nitrogen and phosphorus removal from wastewater have caught more and more attention

while influent C/P ratio is one of the most important influence factors. To investigate the effects of feed water C/P ratio on the performance of anaerobic-anoxic-oxic process

four different feed water C/P ratios were designed

that is 55

so as to study the variations of COD

PO3-4-P and sludge characteristics with the C/P ratio. The results showed that when the C/P ratio was lower than 32

P removal efficiency increased as C/P ratio increased linearly

while the C/P ratio was higher than 32

the P removal efficiency maintained at 90%～98%

and effluent P concentration was lower than 0.5 mg8226;L-1.In contrast

regardless of the C/P ratio

excellent COD (90%) and good total nitrogen removal (75%～84%) were maintained throughout the experiments.However

P percentage in the wasted activated sludge (WAS) increased as the C/P ratio decreased. It was also found that denitrifying P removal existed under different C/P ratios by controlling the operation

and nitrogen and phosphorus removal efficiency could be improved.

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