Study on Affecting Factors of Zeolite Biological Aerated Filter (ZBAF) in Micro-polluted Raw Water Treatment

2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring Pub Date : 2011-04-11 DOI:10.1109/CDCIEM.2011.231

L. Jinxiang, Xie Shui-bo, Lou Jinsheng, Zhongqi Yan, C. Ting

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Abstract

The removal of CODMn, NH4+-N from micro-polluted raw water were investigated by zeolite biological aerated filter process. Several selected test factors such as media height ofBAF£¬hydraulic retention time(HRT)£¬the air/water ratio and concentration of NH4+-N in raw water were studied in the article. The test Results showed that the removal rate of pollutants from the micro-polluted raw water would improve with the increase of media height at the hydraulic retention time of 30min and the air/water ratio of 1:1. CODMn¡¢UV254¡¢turbidity were removed mostly at the foremost height of440mm, and NH4+-N was removed mostly at the height of220~440mm. The average removal rates of CODMn were36.81%, 33.17% and 26.29% respectively at the hydraulic retention time of 15min, 30min and 60min respectively, air/water ratio of 1:1. When the hydraulic retention time is30min, 28.24% of CODMn and 90.57% of NH4+-N were removed at the air/water ratio of 0.5:1, and 31.20% of CODMn and 93.22% of NH4+-N were removed at the air/water ratio of1:1. When the air/water ratio was 2:1, the average removal rates of CODMn and NH4+-N were hardly improved. The appropriate hydraulic retention time and air/water ratio of ZBAF to treat micro-polluted raw Water were 30min and 1:1respectively.

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沸石曝气生物滤池(ZBAF)处理微污染原水的影响因素研究

研究了沸石曝气生物滤池对微污染原水中CODMn、NH4+-N的去除效果。对baf介质高度、水力停留时间、气水比和原水NH4+-N浓度等试验因素进行了研究。试验结果表明，当水力停留时间为30min，气水比为1:1时，随着介质高度的增加，微污染原水中污染物的去除率有所提高。CODMn、UV254浊度在最上层高度440mm处去除最多，NH4+-N在220~440mm处去除最多。水力停留时间分别为15min、30min和60min，气水比为1:1时，CODMn的平均去除率分别为36.81%、33.17%和26.29%。水力停留时间为30min时，空气/水比为0.5:1时，CODMn去除率为28.24%，NH4+-N去除率为90.57%;空气/水比为1:1时，CODMn去除率为31.20%，NH4+-N去除率为93.22%。当气水比为2:1时，CODMn和NH4+-N的平均去除率几乎没有提高。ZBAF处理微污染原水的适宜水力停留时间和气水比分别为30min和1:1。

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2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring

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