A<sup>2</sup>O工艺和A<sup>2</sup>O+BCO工艺的脱氮除磷性能比较

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摘要以实际低C/N生活污水为研究对象，依次分别采用A²O工艺和A²O+BCO（生物接触氧化）工艺考察系统的脱氮除磷性能.试验在进水负荷和运行参数基本维持不变的情况下运行134d.结果表明，相对于A²O系统，A²O+BCO系统由于采用双污泥工艺，硝化菌和聚磷菌（PAOs）污泥龄分离，同时反硝化除磷"一碳两用"，碳源利用率更高，TN和TP去除率分别提高了18%和28%.其次FISH试验表明，在稳定运行的A²O+BCO工艺中，PAOs比例为22%，远远超过A²O中7%的比例，从微生物角度证明了脱氮除磷效果好的原因.

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	赵伟华
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	李夕耀
	彭永臻

关键词 ：低碳氮比(C/N), A²O工艺, A²O+BCO工艺, 反硝化除磷, 双污泥

Abstract：A²O and A²O+BCO process were employed to treat domestic wastewater with low carbon to nitrogen ratio (C/N=3.96) to compare their nutrient removal performance,respectively. The influent loading and operation condition were kept consistent for 134 days, A²O+BCO system achieved a higher nitrogen and phosphorus removal efficiency than A²O system because of the application of denitrifying phosphorus removal technology and two-sludge theory, which could use carbon resource more efficiently and solve the SRT contradiction between nitrifiers and PAOs. PAOs accounts for 22% in the stable A²O+BCO system higher than 7% in the A²O system, which explain the mechanism for the superior nutrient removal performance.

Key words： low C/N ratio A²O process A²O+BCO process denitrifying phosphorus removal two sludge

收稿日期: 2018-08-20

PACS:

X703.5

基金资助:国家自然科学基金资助项目（51578014）；北京市教委资助项目

通讯作者: 彭永臻,教授,pyz@bjut.edu.cn E-mail: pyz@bjut.edu.cn

作者简介: 赵伟华(1988-),男,山东潍坊人,助理研究员,博士,主要从事污水处理及资源化技术研究.发表论文14篇.

引用本文:

赵伟华, 王梅香, 李健伟, 冯岩, 刘博, 李夕耀, 彭永臻. A²O工艺和A²O+BCO工艺的脱氮除磷性能比较[J]. 中国环境科学, 2019, 39(3): 994-999. ZHAO Wei-hua, WANG Mei-xiang, LI Jian-wei, FENG Yan, LIU Bo, LI Xi-yao, PENG Yong-zhen. Nitrogen and phosphorus removal performance comparison between A²O and A²O+BCO system. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(3): 994-999.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2019/V39/I3/994

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