HCPA-UF-MBR组合工艺处理低温高色高氨氮水源水研究

将高浓度纯化凹凸棒土(HCPA)投加至UF-MBR中,形成HCPA-UF-MBR组合工艺,研究HCPA-UF-MBR、UF-MBR两平行系统对低温高色高氨氮水源水的除污效果、反应器内活性污泥性能及膜污染情况,考察HCPA的作用机理与效能.结果表明,HCPA-UF-MBR对色度、CODMn、NH -N、TN的平均去除率为94.60%、81.61%、98.44%、58.30%,出水NO -N、NO -N浓度均较低;HCPA投加后,UF-MBR的除污效果与抗冲击负荷能力增强,污泥总活性与硝化活性分别提高了9.09%、105.88%,反应器达到稳定时间短且波动小,内部活性污泥硝化反硝化过程更充分;此外,HCPA吸附混合液中部分有机物,改善了污泥混合液性能,使膜表面滤饼层较疏松且透水性较好,有效地减轻了膜污染程度.

Research on HCPA-UF-MBR combined process treating high color and ammonia nitrogen from source water at low temperature

High Concentration of Purified Attapulgite (HCPA) was added into UF-MBR to form HCPA-UF-MBR process, the decontamination effect of HCPA-UF-MBR and UF-MBR parallel systems treating high color and ammonia nitrogen from source water at low temperature was researched, the performance of activated sludge and membrane pollution in each reactor was studied, HCPA function and efficiency were examined. The results show that the average removal rate of chromaticity, CODMn, NH -N and TN was 94.60%, 81.61%, 98.44% and 58.30%, respectively. The NO -N and NO -N concentration from the effluent were lower. After HCPA dosing, the decontamination effect and anti shock loading capability of UF-MBR were improved. The sludge total activity and nitrification activity increased by 9.09% and 105.88%, respectively. The HCPA-UF-MBR reactor achieved stability in short time and small fluctuations. The nitrification and denitrification processes of activated sludge inside HCPA-UF-MBR reactor were more fully. In addition, HCPA adsorbed organic matter in mixture and improved the sludge mixture properties. It makes the cake layer on the membrane surface more loose and more permeable. It reduced effectively the degree of membrane fouling.