Pilot Study on Low Temperature Stability of Aerobic Granular Sludge

Journal article (2022)

Authors

M.C.M. Loosdrecht BT/Environmental Biotechnology - AS
Xiaodi Hao Beijing University of Civil Engineering & Architecture
Yuanyuan Wu Beijing University of Civil Engineering & Architecture
Research Group
BT/Environmental Biotechnology (AS) (TU Delft)
Copyright: © 2022 Mark C.M. van Loosdrecht, Xiaodi Hao, Yuanyuan Wu
DOI: https://doi.org/10.19853/j.zgjsps.1000-4602.2022.11.010
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Published Date

2022-6

Language

Chinese (Traditional)

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Faculty

Applied Sciences

Department

BT/Biotechnologie

Research Group

BT/Environmental Biotechnology

Abstract

摘要： 好氧颗粒污泥技术具有占地面积小、能耗低、剩余污泥量少、抗冲击性强等优点，是
一种可持续的污水处理技术。以北京某污水处理厂实际生活污水作为基质，在中试规模（有效容积
为2.5 m3）反应器中进行好氧颗粒污泥培养，研究了颗粒污泥在低温条件下的稳定性。中试自夏季
开始运行到次年春季结束，共计运行260 d。结果表明，采用我国实际低碳源市政污水可以培养出好
氧颗粒污泥，污泥颗粒化程度可达94%，SVI5/SVI30为1.1 ~ 1.3。冬季低温会造成颗粒污泥的枝状结
构增多、丝状菌生长，进而引起颗粒化比例略有下降，为80%~91%，污泥平均粒径降低，SVI5/SVI30升
高至1.5 ~ 1.8。在冬季低温条件下，通过优化调控进水流量、曝气时长、曝气过程DO浓度可提高脱
氮效率。中试期间各阶段反应器出水COD、TP、NH4+-N以及TN均可以满足GB 18918—2002的一级
A排放标准，但是低温条件下TN去除率略有下降（降幅为6%~9%），存在一定超标风险

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