气浮-炭砂过滤工艺在好氧条件下强化污水处理的生物作用

摘要

介绍气浮-炭砂过滤工艺处理污水的生物作用研究,比较了气浮-炭砂过滤工艺和直接过滤工艺对COD、UV254和NH3-N等与生物作用相关指标的去除效果.试验结果表明,在相同条件下气浮-炭砂过滤工艺比直接过滤工艺对COD、UV254和NH3-N去除率分别提高了25.3％、32.9％和33.2％.分析表明,这是由于气浮工艺能够提供充足的溶解氧,对微生物的生长起到促进作用,气浮-炭砂过滤工艺的生物量比直接过滤工艺提高38％ ～ 87％,这对实际生产中气浮-炭砂过滤工艺的运行具有一定的指导意义.%Biological effects of flotation-GAC sand filtration process on the sewage treatment were introduced.Removal efficiency of COD,UV254,NH3-N and other indicators related to biological function was investigated by comparing flotation-GAC sand filtration process and direct filtration process.The results indicated that,under the same conditions,flotation-GAC sand filtration process was better than direct filtration process in removing pollutants COD,UV254 and NH3-N,with an increased removal rate of 25.3％,32.9％ and 33.2％,respectively.This was because the flotation process could provide sufficient dissolved oxygen for the growth of microorganisms.Biomass ratio of flotation-GAC sand filtration process,compared with direct filtration process,was increased from 38％ to 87％.This was certainly guiding significant to the operation of flotation-GAC sand filtration process in actual production.