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采用上流式曝气生物活性炭滤池(UABACF)处理PVA退浆废水,在固定水力负荷为0.076 m3/(m2·h)条件下,研究气水比对PVA、COD和浊度去除效果的影响,分析污染物去除、微生物量、微生物活性在滤柱高度方向的沿程分布特征。气水比对COD去除率影响最大、PVA次之,对浊度去除的影响最小,在气水比为4∶1条件下,PVA、COD和浊度的去除率分别为66.65%、89.60%和80.25%。1.3 cm滤柱高度以下为污染物高效去除区域,系统微生物量和微生物脱氢酶活性在此高度范围内逐渐降低,而后基本保持稳定状态。生物滤池对PVA主要依靠生物吸附作用去除,生物降解部分仅占被吸附PVA的24.9%。
The effects of gas-water ratio on the removal efficiency of PVA, COD and turbidity were investigated under the conditions of a fixed hydraulic load of 0.076 m3 / (m2 · h) by using up-flow biological activated carbon filter (UABACF) Analysis of pollutant removal, microbial biomass, microbial activity along the filter column along the height direction of the distribution characteristics. The effect of gas-water ratio on COD removal efficiency was the greatest, followed by PVA, which had the least influence on turbidity removal. The removal rates of PVA, COD and turbidity were 66.65% and 89.60% under the air-water ratio of 4:1 80.25%. 1.3 cm below the height of the filter column for the highly efficient removal of pollutants, microbial biomass and microbial dehydrogenase activity in this height range gradually decreased, and then remained stable. Biofilter mainly relies on biosorption to remove PVA, while biodegradation account for only 24.9% of the absorbed PVA.