Achieving partial nitritation in sewage treatment system based on treating activated sludge by FNA

doi:10.11949/j.issn.0438-1157.20151089

CIESC Journal ›› 2015, Vol. 66 ›› Issue (12): 5054-5059.DOI: 10.11949/j.issn.0438-1157.20151089

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Achieving partial nitritation in sewage treatment system based on treating activated sludge by FNA

MA Bin, WEI Yan, WANG Shuying, CHEN Ya, PENG Yongzhen

Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China

Received:2015-07-08 Revised:2015-09-14 Online:2015-12-05 Published:2015-12-05
Supported by:
supported by the National Natural Science Foundation of China (51508008), the Natural Science Foundation of Beijing (8154041) and the Training Programme Foundation for the Talents in Beijing (2014000020124G043).

基于FNA处理污泥实现城市污水部分短程硝化

马斌, 委燕, 王淑莹, 陈娅, 彭永臻

北京工业大学北京市污水脱氮除磷处理与过程控制工程技术研究中心, 北京市水质科学与水环境恢复工程重点实验室, 北京 100124

通讯作者: 彭永臻
基金资助:
国家自然科学基金项目(51508008);北京市自然科学基金项目(8154041);北京市优秀人才培养资助项目(2014000020124G043)。

Abstract

Abstract:

In order to achieve nitritation/anammox in sewage treatment, the feasibility of achieving partial nitritation using free nitrous acid (FNA) to treat activated sludge was studied in a system treating real wastewater. The results showed that the FNA inhibition on NOB was stronger than that on AOB since the decrease of nitrite oxidation rate was more than that of ammonium oxidation rate, after treating activated sludge by FNA. At the same time, FNA inhibition incresed with increasing FNA concentration at 0-0.75 mg HNO₂-N·L^-1. The nitrite accumulation rate (NAR) was only 1% after seeding activated sludge obtained from a wastwater treatment plant, indicating that nitrification was happened. When FNA treatment was used with a sludge retention time (SRT) of 15 days, nitritation was achieved since NAR increased to above 90%. The partial nitritation was achieved, and the ratio of of NO₂^--N/NH₄⁺-N effluent was 1.24 on average when hydraulic retention time (HRT) decreased to 2.5 h. This effluent could meet the requirement of anammox reaction. Thus, partial nitritation could be achieved in sewage treatment system using the activated sludge treated by FNA when SRT and HRT were controlled.

Key words: activated sludge, sewage, partial nitritation, sludge retention time, hydraulic retention time

摘要：

为实现城市污水短程硝化厌氧氨氧化生物脱氮,以去除有机物的实际污水为研究对象,考察了游离亚硝酸盐(FNA)处理污泥实现城市污水部分短程硝化的可行性。结果表明,FNA处理活性污泥后,亚硝酸盐氧化菌(NOB)的亚硝酸盐氧化速率下降程度大于氨氧化菌(AOB)的氨氧化速率,且在0～0.75 mg HNO₂-N·L^-1范围内随着FNA浓度的增加抑制作用增强。接种实际污水厂活性污泥后,系统亚硝酸盐(NO₂^--N)积累率仅为1%,即为全程硝化。在控制污泥龄约为15 d的条件下,采用FNA处理污泥可使系统亚硝酸盐积累率增加至90%以上。水力停留时间调至2.5 h时,实现了部分短程硝化,且出水NO₂^--N/NH₄⁺-N平均值为1.24,可满足厌氧氨氧化脱氮反应的要求。因此采用FNA处理污泥,结合水力停留时间和污泥龄控制可实现城市污水部分短程硝化。

关键词: 活性污泥, 城市污水, 部分短程硝化, 污泥龄, 水力停留时间

CLC Number:

X703

MA Bin, WEI Yan, WANG Shuying, CHEN Ya, PENG Yongzhen. Achieving partial nitritation in sewage treatment system based on treating activated sludge by FNA[J]. CIESC Journal, 2015, 66(12): 5054-5059.

马斌, 委燕, 王淑莹, 陈娅, 彭永臻. 基于FNA处理污泥实现城市污水部分短程硝化[J]. 化工学报, 2015, 66(12): 5054-5059.

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Achieving partial nitritation in sewage treatment system based on treating activated sludge by FNA

基于FNA处理污泥实现城市污水部分短程硝化

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