Start-up of pilot-scale AAO-BAF two-sludge system

ZHANG Yong; WANG Shuying; ZHAO Weihua; SUN Shihao; PENG Yongzhen; ZENG Wei

doi:10.11949/j.issn.0438-1157.20150188

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Start-up of pilot-scale AAO-BAF two-sludge system

更新时间：2025-12-10

- Start-up of pilot-scale AAO-BAF two-sludge system
- CIESC Journal Issue 10, Pages: 4228-4235(2015)
- 作者机构：
  
  北京工业大学北京市水质科学与水环境恢复工程重点实验室, 北京市污水脱氮除磷处理与过程控制工程技术研究中心,北京,100124
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150188
  CLC： 703.1
- Online First：05 October 2015，
  
  Published：05 October 2015
- 稿件说明：
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ZHANG Yong, WANG Shuying, ZHAO Weihua, et al. Start-up of pilot-scale AAO-BAF two-sludge system[J]. CIESC Journal, 2015, (10): 4228-4235.
DOI：

ZHANG Yong, WANG Shuying, ZHAO Weihua, et al. Start-up of pilot-scale AAO-BAF two-sludge system[J]. CIESC Journal, 2015, (10): 4228-4235. DOI： 10.11949/j.issn.0438-1157.20150188.

摘要

AAO-曝气生物滤池(BAF)是污泥龄差距较大的双污泥系统

可在低C/N条件下实现氮、磷的同步去除。本试验以低碳氮比的城市污水为处理对象

研究了处理量为40~100 m3·d-1的大型中试级别的AAO-BAF脱氮除磷工艺的启动运行。通过先使AAO和BAF独立运行以分别培养驯化聚磷菌活性污泥和硝化细菌生物膜

待分别观察到AAO出水TP及BAF 出水NH4+-N浓度稳定后

再将两部分连通运行的策略

使得在第58天时系统出水COD、、TN、TP、浊度、SS分别小于50 mg·L-1、5 mg·L-1、15 mg·L-1、0.5 mg·L-1、5NTU、10 mg·L-1

表明该中试系统已成功启动。与小试研究比较发现

分开运行更有利于聚磷菌的培养驯化;BAF中采用自然挂膜法较接种污泥法更方便

但增加了填料挂膜的时间。根据微生物群落多样性分析

发现AAO中的硝化细菌丰度少于3%

而BAF生物膜上的硝化细菌的丰度占到12%以上。本试验可为该工艺的实际工程应用提供一定参考。

Abstract

Anaerobic/anoxic/oxic (AAO)-biological aerated filter (BAF) is a two-sludge system with different SRT

which can remove nitrogen and phosphorus simultaneously in the low C/N condition. The startup of a pilot-scaled AAO-BAF system with capacity of 40—100 m3·d-1 used for treating real domestic sewage was studied in this experiment. The AAO and BAF run independently in order to cultivate and acclimate the phosphorus accumulating organisms (PAOs) and nitrifying bacterial biofilms

respectively. When the TP concentration of AAO effluent and concentration of BAF effluent were found keeping stable

the two parts were combined. With this operation strategy

the effluent concentration of COD

NTU and SS was lower than 50 mg·L-1

5 mg·L-1

15 mg·L-1

0.5 mg·L-1

5 NTU and 10 mg·L-1 in the 58th day

respectively

indicating the successful setup of the pilot-scaled process. Comparing with the lab-scale study

the separate running had more advantage in cultivating PAOs. The formation of natural biofilm in BAF was more convenient than the method of inoculated sludge

but needed longer time. According to the analysis of microbial community diversity

the abundance of nitrobacteria was less than 3% in the AAO system

however

it was higher than 12% on the biofilm in BAF. This experiment can provide a reference for practical engineering application of the process.

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