Study on Biological Characteristics of Up-flow Biological Aerated Filter Used for Urban Sewage Treatment
The up-flow biological aerated filter (UBAF) was applied in urban sewage treatment. The influences of hydraulic loading, the ratio of air/water and filter height on the distribution of UBAF biofilm thickness, biomass and bioactivity were studied, and the biofacies of UBAF had been observed. The results showed that, when the ratio of air/water was 2 to 1, with the increase of the hydraulic loading, UBAF biofilm thickness was on the downtrend, but the biomass and the bioactivity were on the uptrend. When the hydraulic loading increased to 1.4 m3·m-2·h-1 from 0.8 m3·m-2·h-1, the average biofilm thickness reduced by 26.5 μm, but the average biomass and bioactivity increased by 32 nmolP per gram filter and 2.25 milligram O2 per gram filter per hour, respectively. When the hydraulic loading was 0.8 m3·m-2·h-1, with the ratio of air/water increasing, UBAF biofilm thickness and the biomass were on the downtrend, but bioactivity was opposite. When the ratio of air/water increased to 3 to 1 from 2 to 1, the average biofilm thickness and biomass reduced by 33.5 μm, 30 nmolP per gram filter, respectively, and the average bioactivity increased by 3.75 milligram O2 per gram filter per hour. In addition, with the increase of filter height, the biofilm thickness and the biomass tended to decrease, but the bioactivity increased first, and then decreased. UBAF biofilm with a long and complicated food chain had a rich biofacies, and formed a compound ecosystem of higher stability.
up-flow biological aerated filter (UBAF) biofilm thickness biomass bioactivity biofacies
LI Simin LIU Qiang SHI Zhennan TANG Fengbing
College of Urban Construction,Hebei University of Engineering,Handan 056038,Hebei,China
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
1452-1456
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）