水力停留时间对水解酸化-改性贻贝壳填料曝气生物滤池处理模拟生活污水的影响  

Impact of hydraulic retention time on the hydrolytic acidification with the modified mussel shell taken as packing media in biological aerated filter for sewage treatment

作　　者：孙会玲[1] 陈庆国[1] 刘梅[1] 林梦晓 穆军[1] 孙静亚[1] 

机构地区：[1]浙江海洋学院海洋科学与技术学院,浙江舟山316000

出　　处：《安全与环境学报》2016年第2期309-313,共5页Journal of Safety and Environment

基　　金：浙江省自然科学基金项目(LY14D060003;LQ13D060001);舟山市科技计划项目(2014C41004)

摘　　要：研究了水力停留时间(HRT)对以贻贝壳和3种不同质量分数柠檬酸改性的贻贝壳为填料的曝气生物滤池(BAF)与水解酸化池组合对模拟生活污水中COD、氨氮(NH3-N)和总磷(TP)去除效果的影响,并对4个系统的处理效果进行比较,以考察贻贝壳改性程度对系统处理效果的影响。结果表明,贻贝壳及改性贻贝壳均可以作为BAF的填料,其中0.5%柠檬酸改性的贻贝壳填料处理系统对模拟生活污水的处理效率最高。HRT对COD和TP去除效果的影响较大;HRT为4 h或8 h时,4个系统对NH3-N的平均去除率均在92.30%以上。This paper takes it as its purpose to study the impact of hydraulic retention time on the hydrolytic acidification with the modified mussel shell taken as packing media for treating the simulated domestic sewage by using biological aerated filters（ BAF） combined with the hydrolytic acidification technology. For the said purpose,we have chosen the chemical oxygen demand（ COD）,the ammonia nitrogen（ NH3- N） and the total phosphorus（ TP） as the evaluation indicators of the sewage treating efficiency. As is known,mussel shells can be used as a biomass carrier of BAF and modified by citric acid with 3 different concentration percentages（ 0. 5%,1%,2%）while the citric acid can also be used to modify the surface of the mussel shell to improve the adhesive capacity of biofilm to cover it.In addition,3 kinds of modified mussel shell and unmodified mussel the above mentioned can all be adopted to serve as carriers of BAF,respectively,it would be possible to form 4 hydrolytic acidificationBAF systems to process the simulated domestic sewage. Thus,we have identified and determined the removal efficiency of COD,NH3- N and TP in the process of simulated domestic sewage treatment.We have also made an exploration of the effects of the modification level on the said pollutant removal and the effects of the hydraulic retention time（ HRT） on the four treatment systems. For the HRT purpose,we have set the HRT as 4 h and 8 h,respectively. The results of our simulated research have shown that it is feasible and efficient to apply the mussel shells and modified mussels with the citric acid as BAF carriers. Furthermore,we have also modified the system with the mussel shells by 0. 5%（ mass ratio） citric acid,with the result of discovering its performance better than the others in the pollutant removing efficiency. When the HRT was 4 h,the average removal efficiencies of COD,NH3- N and TP could reach 76. 35%-81. 58%,92. 47%- 95. 27% and 79. 06%- 87. 46%,respectively.And when the HRT was 8 h,the average removal ef

关 键 词：环境工程学 曝气生物滤池(BAF) 水力停留时间(HRT) 改性贻贝壳 生活污水 

分 类 号：X703[环境科学与工程—环境工程]