气水比对曝气生物滤池处理城市中水效能的影响

doi:10.19741/j.issn.1673-4831.2018.0014

生态与农村环境学报 ›› 2019, Vol. 35 ›› Issue (2): 264-271.doi: 10.19741/j.issn.1673-4831.2018.0014

• 污染控制与修复 • 上一篇

气水比对曝气生物滤池处理城市中水效能的影响

周广吉¹, 张兰河², 叶振起¹, 徐岩¹, 魏来¹, 房国成¹

1. 国网辽宁省电力有限公司电力科学研究院, 辽宁沈阳 110006;
2. 东北电力大学化学工程学院, 吉林吉林 132012

收稿日期:2018-01-13 出版日期:2019-02-25 发布日期:2019-03-25
作者简介:周广吉(1987-),男,吉林农安人,工程师,硕士生,主要研究方向为废水生物处理技术与工艺研究。E-mail:zhouguangji@126.com
基金资助:
国家自然科学基金（51678119，51508073）；吉林省发展计划（20180201016SF，20180101309JC，20172519013JH）

Effect of Air-Water Ratio on Reclaimed Water Treatment in a Biological Aerated Filter

ZHOU Guang-ji¹, ZHANG Lan-he², YE Zhen-qi¹, XU Yan¹, WEI Lai¹, FANG Guo-cheng¹

1. Electric Power Research Institute of State Grid Liaoning Electric Power Co. Ltd., Shenyang 110006, China;
2. School of Chemical Engineering, Northeast Dianli University, Jilin 132012, China

Received:2018-01-13 Online:2019-02-25 Published:2019-03-25

摘要/Abstract

摘要：

成本控制和节水减排是火电企业面临的2个重要难题，中水回用是一种切实可行的应对办法。以华能营口仙人岛热电机组曝气生物滤池（biological aerated filter，BAF）工艺处理城市中水为例，探究了气水比对BAF污染物去除效能的作用；考察了反冲洗气水比对污染物去除能力恢复和运行时间的影响，得出了最适气水比。结果表明：气水比为4∶1时，COD、NH₄⁺-N、NO₃^--N的去除率分别为61.1%、81.2%和48.6%，污染物综合去除效果最佳。反冲洗气水比为4∶1时，固体悬浮物（SS）具有较好的去除效果；运行4 h时，COD去除率即可恢复，为60.3%；运行5 h时，NH₄⁺-N和NO₃^--N去除率即可恢复，分别为82.2%和50.0%；运行时长可达25 h。反冲洗气水比为4∶1时能够最大化释放BAF的纳污容量，延长运行时间，降低反冲洗频次，污染物去除效率较好。

关键词: 曝气生物滤池, 气水比, 反冲洗, 硝化反硝化, 中水回用

Abstract:

Water reuse is a feasible strategy to solve the problems of cost control and water-saving emission reduction in thermal power enterprises. The effect of air-water ratio on the pollutants removal was investigated using biological aerated filter (BAF) technology in the Xianren Island thermoelectric unit of Huaneng in Yingkou. The effect of backwashing air-water ratio on the recovery capacity of pollutant removal and operation time was also investigated. Results show that the removal efficiencies of COD, NH₄⁺-N and NO₃^--N were 61.1%, 81.2% and 48.6%, respectively, when the ratio of air-water was 4:1 in the BAF, and the overall removal achieved a good overall removal performance with the ratio of air-water of 4:1. Moreover, the BAF had a good SS removal when the ratio of backwashing air-water was 4:1. The BAF was able to recover the COD removal ability, where the removal efficiency of COD was 60.3% within 4 h. The NH₄⁺-N and NO₃^--N removal ability was also recovered in 5 h with a removal efficiency of 82.2% and 50.0%, respectively. The operation time could last 25 h. BAF has showed an excellent capacity prolonging the operation time and reducing the frequency of backwashing when the ratio of backwashing air-water was 4:1.

Key words: biological aerated filter, air-water ratio, backwashing, nitrification and denitrification, reclaimed water reuse

中图分类号:

X703.1

周广吉, 张兰河, 叶振起, 徐岩, 魏来, 房国成. 气水比对曝气生物滤池处理城市中水效能的影响[J]. 生态与农村环境学报, 2019, 35(2): 264-271.

ZHOU Guang-ji, ZHANG Lan-he, YE Zhen-qi, XU Yan, WEI Lai, FANG Guo-cheng. Effect of Air-Water Ratio on Reclaimed Water Treatment in a Biological Aerated Filter[J]. Journal of Ecology and Rural Environment, 2019, 35(2): 264-271.

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气水比对曝气生物滤池处理城市中水效能的影响

Effect of Air-Water Ratio on Reclaimed Water Treatment in a Biological Aerated Filter

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