Implementation of integrated autotrophic nitrogen removal system at normal temperature by returned sludge

YANG Qing; ZHOU Tong; LIU Xiuhong; LI Haixin; LI Jianmin; YU Fei; PENG Yongzhen

doi:10.11949/j.issn.0438-1157.20161699

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Implementation of integrated autotrophic nitrogen removal system at normal temperature by returned sludge

更新时间：2025-12-10

- Implementation of integrated autotrophic nitrogen removal system at normal temperature by returned sludge
- CIESC Journal Issue 5, Pages: 2081-2088(2017)
- 作者机构：
  
  1. 北京工业大学城镇污水深度处理与资源化利用技术国家工程实验室,北京,100124
  2. 中国人民大学环境学院,北京,100872
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20161699
  CLC： 703.1
- Online First：05 May 2017，
  
  Published：05 May 2017
- 稿件说明：
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YANG Qing, ZHOU Tong, LIU Xiuhong, et al. Implementation of integrated autotrophic nitrogen removal system at normal temperature by returned sludge[J]. CIESC Journal, 2017, (5): 2081-2088.
DOI：

YANG Qing, ZHOU Tong, LIU Xiuhong, et al. Implementation of integrated autotrophic nitrogen removal system at normal temperature by returned sludge[J]. CIESC Journal, 2017, (5): 2081-2088. DOI： 10.11949/j.issn.0438-1157.20161699.

摘要

为实现高氨氮废水的高效低耗稳定去除，在常温条件下，对曝气生物滤池（BAF）中实现与稳定短程硝化-厌氧氨氧化自养脱氮工艺进行了研究。研究结果表明：常温条件下，BAF接种二沉池回流污泥，采用闷曝-连续运行结合的接种挂膜方式，可成功实现短程硝化-厌氧氨氧化一体化自养脱氮。闷曝阶段使种泥活性恢复，而连续流运行过程中游离氨（FA）浓度高，可抑制亚硝酸盐氧化菌（NOB），实现BAF中亚硝酸盐累积；通过调整BAF回流方式，降低回流液中NO2--N，防止NOB生长，并通过厌氧氨氧化（Anammox）滤池出水回流方式，接种微量Anammox菌，运行80 d可实现短程硝化-厌氧氨氧化，140 d后系统运行稳定，总氮（TN）去除率达76.62%。生物滤池有利于短程硝化-厌氧氨氧化工艺的实现与稳定，生物膜中不同厚度存在好氧缺氧环境，利于氨氧化菌（AOB）和Anammox菌共存；滤料的过滤作用有效地防止了Anammox菌流失，使其在系统中不断累积生长。不仅如此，AOB和Anammox菌均为自养菌且生长缓慢，避免了生物滤池的频繁反冲洗，简化了生物滤池的运行。气水比是BAF中一体化运行的关键参数，本研究中最佳的气水比为12：1，氨氮去除负荷达到0.91 kg N·m-3·d-1，氨氮和TN去除率分别可达96.86%和85.47%。

Abstract

To treat high ammonia nitrogen wastewater efficiently and low costly

achieving and stabilizing autotrophic nitrogen removal in biology aerated filter (BAF) were studied. The obtained results showed that autotrophic nitrogen removal was achieved through the combination of batch and continuous operation in the BAF with volcanics as filter

using the second pond reflux sludge as seeding sludge. During batch operation

the activity of seeding sludge was recovered. During the continuous operation

high free ammonia (FA) concentration inhibited the growth of nitrite oxidation bacteria (NOB). Through recycling the effluent of anaerobic ammonia oxidation (Anammox) biofilter

very slight of Anammox bacteria was inoculated in BAF. After 80 days operation

autotrophic nitrogen removal was achieved. From the 140th day

the removal rate of total nitrogen (TN) approach to 76.62%

and it can be stable all the time. Since aerobic and anoxic environment occurred in different depth of biofilm

ammonia oxidation bacteria (AOB) and Anammox bacteria can coexist in biofilm. Meanwhile

the filtration of volcanics can prevent Anammox bacteria from flowing out of BAF

making the enrichment of Anammox in the system of autotrophic nitrogen removal. In the meantime

AOB and Anammox as autotrophic bacteria grows slow

preventing the biofilter backwash frequently and simplifying the operation of biofilter. Air and water ratio is one of the key operation parameters in BAF of partial nitrification and Anammox. It was shown that the optimal air and water ratio in this study was 12:1. Accordingly

the removal loading radio of ammonia was 0.91 kg N·m-3·d-1. The removal efficiency of ammonia and TN were 96.86% and 85.47%

respectively.

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