延长缺氧区水力停留时间提高倒置AAO/MBR组合工艺的脱氮效果  

Effect of Reversed AAO/MBR Combined Processes on Improvement of Denitrification by Prolonging HRT in Anoxic Zone

作　　者：朱星[1] 郑晓英[1] 朱宁伟[1] 高雅洁[1] 周橄 周翔[1] 

机构地区：[1]河海大学环境学院浅水湖泊综合治理与资源开发教育部重点实验室,江苏南京210098

出　　处：《净水技术》2017年第1期67-72,共6页Water Purification Technology

基　　金：江苏省水利科技项目(2015027);中央高校基本科研业务费专项(2015B16414);国家自然科学基金青年项目(51208174)

摘　　要：针对城市污水处理厂进水碳源不足的问题,采用中试规模的倒置AAO/MBR组合工艺,开展通过延长缺氧区水力停留时间以提高系统脱氮效果的研究。结果表明,延长缺氧区水力停留时间可强化反硝化菌对污水中慢速可降解有机碳源和内碳源的利用,可提高组合工艺的整体脱氮效率。当缺氧区水力停留时间从1.5 h增加到3.7 h,组合工艺出水TN可降低至9.25±2.13 mg/L;同时,系统COD_(Cr)和TP去除稳定,平均去除率分别稳定在93.12±3.29%和93.96±1.14%。A pilot scale combined process of reversed AAO/MBR was constructed and proposed to investigate the strengthening effect of nitrogen removal by prolonging hydraulic retention time （HRT） in anoxic zone under condition of insufficient carbon source in municipal wastewater treatment plants. The results indicated that the utilization of slow degradable organic carbon and intracellular carbon by denitrifying bacteria could be strengthened with the prolongation of anoxic zone＇ s HRT. As a result, the nitrogen removal performance was enhanced. When the HRT of anoxic zone extends from 1.5 h to 3.7 h, TN of the effluent could be reduced to 9.25 ± 2.13 mg/L. In addition, the combined process had stable CODcr and TP removal ratios of 93.12% ± 3.29% and 93.96% ± 1.14%, respectively.

关 键 词：倒置AAO/MBR 缺氧区 水力停留时间 强化脱氮 内碳源 

分 类 号：TQ992.3[化学工程]