AOA-O模式下好氧颗粒污泥同步硝化内源反硝化除磷

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摘要为构建同步硝化内源反硝化除磷颗粒污泥系统，设置四组厌氧/好氧/缺氧（AOA）以及不同后置曝气时间（5min、10min、20min）的AOA-O序批式反应器，探究不同运行模式下污泥颗粒化和反硝化聚磷菌（DPAOs）富集情况.结果表明，后置短时曝气的反应器颗粒污泥结构致密、沉淀性能良好，可强化内碳源储存并分泌更多的胞外聚合物（EPS），具有更高的脱氮除磷率及DPAOs占比.其中，短时曝气时间10min的R3生物量最高，平均粒径最大，达到986μm，颗粒成熟且稳定.批次试验和三维荧光分析表明其聚磷菌中45.85%为DPAOs且EPS含量最高.稳定运行期间，R3的COD、TN、TP去除率分别为94.13 %、89.41%、96.11%，内碳源储存效率为98.09%，具有良好的处理性能.

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关键词 ：好氧颗粒污泥, 脱氮除磷, 内源反硝化, 反硝化聚磷菌

Abstract：In order to construct a simultaneous nitrification endogenous denitrification phosphorus removal granular sludge system, four groups of anaerobic/aerobic/anoxic (AOA) and AOA-O with different post-aeration time (5min, 10min, 20min) sequencing batch reactors, were set up in this study to explore the enrichment of sludge granulation and denitrifying phosphate-accumulating organisms (DPAOs) in different operation modes. The results showed that the post-short-term aeration reactor granular sludge had dense structure and good precipitation performance, which could enhance the storage of internal carbon source and secrete more eextracellular polymeric substance (EPS), and had higher nitrogen and phosphorus removal rate and DPAOs ratio. The biomass of R3was the highest and the average particle size was the largest (986μm) when the short-term aeration time was 10min. The particles were mature and stable. Batch experiment and three-dimensional fluorescence analysis showed that 45.85% of the phosphorus accumulating bacteria were DPAOs and EPS content was the highest. During stable operation, the COD, TN and TP removal rates of R3 were 94.13%, 89.41% and 96.11%, respectively, and the storage efficiency of internal carbon source was 98.09%, showing good treatment performance.

Key words： aerobic granular sludge nitrogen and phosphorus removal endogenous denitrification denitrifying phosphorus accumulating organisms

收稿日期: 2023-03-03

PACS:

X703

基金资助:北京高校卓越青年科学家计划项目（BJJWZYJH01201910005019）

通讯作者: 李冬,教授,lidong2006@bjut.edu.cn E-mail: lidong2006@bjut.edu.cn

作者简介: 张杰(1938-),男,教授,中国工程院院士,主要从事水处理与水环境修复技术方面研究.发表论文200余篇.lidong2006@bjut.edu.cn.

引用本文:

张杰, 杨杰, 李冬, 高鑫. AOA-O模式下好氧颗粒污泥同步硝化内源反硝化除磷[J]. 中国环境科学, 2023, 43(10): 5226-5234. ZHANG Jie, YANG Jie, LI Dong, GAO Xin. Simultaneous nitrification and phosphorus removal of aerobic granular sludge in AOA-O mode. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(10): 5226-5234.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2023/V43/I10/5226

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