HRT对悬挂链曝气式生物接触氧化工艺的影响  

Influence of HRT on a Biological Contact Oxidation by Suspended Chain Aerator

作　　者：王志勇[1,2] 许振成[2] 虢清伟[2] 熊正为[1] 张永亮[1,2] 彭福全[1,2] 

机构地区：[1]南华大学城市建设学院,湖南衡阳421001 [2]环保部华南环境科学研究所,广东广州510655

出　　处：《环境科学与技术》2009年第5期52-56,61,共6页Environmental Science & Technology

基　　金：国家高技术研究发展计划“863”项目(2005AA60101003)

摘　　要：采用悬挂链曝气式接触氧化工艺在不同HRT下处理大清河雨、旱季污水,应用磷脂法和TTC-脱氢酶活性法研究载体表面生物膜特性,考察了HRT对生物膜特性和水质净化效果的影响。结果表明:在4～10h间时,HRT越长,缺氧区和好氧区内生物量越小和生物活性越弱,但是好氧区内单位生物量活性越强,对污染物的平均去除率越高;当进水由生活污水转变为雨污混合水后,缺氧区和好氧区内生物量逐渐减少,生物活性降低,且好氧区内单位生物量活性也降低,但出水污染物浓度降得更低且稳定。最佳HRT为8h,对COD、NH4+-N、TN和TP的平均去除率分别为75.99%、81.94%、63.30%和81.47%,出水水质达到《城镇污水处理厂污染物排放标准》(GB18918-2002)一级标准A标准。A contact oxidation process with suspended chain aerator was applied to treating rainy and dry season wastewater of Daqing River to study the superficial bio-film characteristics by determining phospholipid and dehydrogenase activity and influence on bio-film characteristics and water quality decontamination under different HRTs. Results showed that between 4h and 10h the longer HRT was, the less biomass was and the lower microbial activity was in anoxic zone and aerobic zone. Yet the stronger microbial activity was in aerobic zone, the higher the average efficiency of contaminants removal was. As influent varied from domestic sewage to mixture of rainwater and sewage, biomass decreased and microbial activity lowered in anoxic zone and aerobic zone, and effluent contaminants concentrations were even lower but stabilized. Average removal rates of effluent of COD,NH4^＋-N,TN and TP were 75.99% ,81.94% ,63.30% and 81.47% respectively, reaching A standard of discharge standard of pollutants for municipal wastewater treatment plant（GB 18918-2002 ） under HRT of 8h.

关 键 词：悬挂链曝气 水力停留时间 生物量 生物活性 磷脂 脱氢酶活性 

分 类 号：X522[环境科学与工程—环境工程]