多级A/O生物膜反应器处理生活污水效果研究  

Study on the Domestic Sewage Treatment Efficiency by Multi-Stage A/O-MBR

作　　者：刘永红[1] 杨楠楠 王宁[1] 党康 杨谨如 LIU Yonghong;YANG Nannan;WANG Ning;DANG Kang;YANG Jinru(College of Environment and Chemical Engineering,Xi’an Polytechnic University,Xi'an 710048,China)

机构地区：[1]西安工程大学环境与化学工程学院,陕西西安710048

出　　处：《水处理技术》2020年第9期118-122,共5页Technology of Water Treatment

基　　金：国家自然科学基金(21176197);陕西省水利厅科技计划项目(2017slkj-9);陕西省创新能力支撑计划项目(2019HBGC-34);陕西省教育厅专项科学研究计划项目(19JK0370);石狮市科技公共服务平台产学研项目(003);西安工程大学2019年度研究生创新基金(chx2019041)。

摘　　要：采用在多级A/O工艺的好氧区O-I投加PBG生物悬浮填料形成的多级A/O生物膜反应器,对某高校生活污水的处理过程进行了研究,考察了投加PBG填料对系统脱氮效果的影响与整个工艺的污泥减量状况。结果表明:在多级A/O工艺的好氧区O-I投加PBG填料前后,系统对于生活污水中COD的去除率由85%提升为90%,TN去除率由65%提高到74%;对NH4+-N的去除率始终保持在99%左右,TP去除率基本保持在75%左右。通过污泥衡算,在投加使用PBG填料后系统污泥表观产率为28.38 mg/g,与传统工艺污泥产率系数相比,该工艺污泥减量效果明显。镜检发现PBG填料生物膜内出现了较大量使食物链延长的钟虫、轮虫等后生动物,这是该系统处理水质情况以及污泥减量效果良好的重要内在原因。A multi-stage A/O-MBR process,which was formed by adding PBG bio-suspension filler in the aerobic zone O-I of the multi-stage A/O process,was used to study the treatment process of domestic sewage in a university.The effect of PBG filler on denitrification and sludge reduction of the whole process were investigated.The results showed that,before and after adding PBG filler in the aerobic zone O-I of the multi-stage A/O process,the removal rate of COD in domestic sewage increased from 85%to 90%,and the total nitrogen removal rate increased from 65%to 74%,the removal rate of ammonia nitrogen and total phosphorus maintained at about 99%and 75%respectively.Through the sludge balance calculation,the apparent yield of the system sludge after adding PBG filler was 28.38 mg/g.Compared with the traditional sludge yield coefficient,the sludge reduction effect of the process was obvious.Microscopic examination revealed that there were a large number of metazoans such as bell worms and rotifers in the biofilm of PBG fillers,which was an important internal reason for the good water quality and sludge reduction effect of the system.

关 键 词：多级A/O 悬浮填料 生物脱氮 污泥减量 

分 类 号：TQ028.8[化学工程] X703.1[环境科学与工程—环境工程]