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

Abstract

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

CLC Number:

X703.1

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

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