一体化生物膜技术处理滨海农村污水  

Integrated biofilm technology for treating rural domestic sewage in coastal areas

作　　者：吴迪[1] 高贤彪[1] 李玉华[1] 赵琳娜[1] 钱姗[1] 何宗均[1] 

机构地区：[1]天津市农业资源与环境研究所,天津300192

出　　处：《环境工程学报》2012年第8期2539-2543,共5页Chinese Journal of Environmental Engineering

基　　金：国家科技部农转资金项目(2011GB2A100007);天津市农业科技成果转化项目(201003010)

摘　　要：对厌氧-3级好氧/缺氧生物膜工艺进行技术改进,并对改进后的"一体化生物膜技术"处理低碳氮比农村生活污水进行了实际应用。新工艺增设了回流泵(回流比2∶1),且厌氧段悬浮填料装填率由原来的15%提高到30%,3级好氧/缺氧段YDT型弹性立体填料装填率依次由原来的50%、40%、25%提高到70%、60%和40%。装置连续稳定运行12个月,平均进水量为18 m3/d,HRT为3.7 d,监测结果表明:对COD、BOD、NH3-N、TN、TP和SS平均去除率分别为75.6%、85.9%、86.7%、63.9%、69.3%和85.5%;出水COD、BOD、NH3-N、TN、TP和SS的平均浓度分别在34.9、8.9、3.4、9.9、0.9和6.9 mg/L以下。改进后出水BOD和TN的去除能力有较大提高,除TP外其他各项指标均达到了设计要求。We developed a new integrated biofilm technology based on tri-stage aerobic/anoxic biofilm, which showed better running parameters and efficiency when treating the rural sewage. This new equipment was installed a recirculation pump （returning ratio is 2：1 ）. This new equipment was installed a recireulation pump （returning ratio is 2： 1）. The padding rate of the suspending padding increased from 15% to 30% compared with the original technology at the anaerobic stage. At tri-stage of aerobic/anoxic, YDT stereo elastic media in- creased from 50% , 40% , 25% to 70% , 60% , 40% , respectively. This equipment was run stably for twelve months. The water injecting amount and hydraulic retention time（HRT） were set at 18 ma/d and 3.7 d, respec- tively. It was showed that the removal efficiencies of COD, BOD, NHa-N, TN, TP and SS were 75. 6% , 85.9% , 86.7% , 63.9% , 69.3% and 85.5% , respectively. The average concentrations of COD, BOD, NH3- N, TN, TP and SS in emitting water after treatment were 34.9, 8.9, 3.4, 9.9, 0.9 and 6.9 mg/L, respective- ly. In a conclusion, this equipment improved the removal capacity of BOD and TN greatly and all indicators ex- cept TP reached our design demands.

关 键 词：农村生活污水 跌水充氧 BOD 脱氮除磷 污泥回流 生物膜 

分 类 号：X703[环境科学与工程—环境工程]