速分生化技术处理热带离岸海岛低C/N值生活污水  

Treatment of Domestic Sewage with Low C/N Ratio in Tropical Offshore Islands by Flowseparated Biochemical Technology

作　　者：李莉[1] 沈彤 赵志伟 张平 李梓晨 曾宪鹏 耿聪 梁志杰 LI Li;SHEN Tong;ZHAO Zhi-wei;ZHANG Ping;LI Zi-chen;ZENG Xian-peng;GENG Cong;LIANG Zhi-jie(College of Environment and Ecology,Chongqing University,Chongqing 400045,China;Special Engineering Construction Office of Naval Logistics Department,Beijing 100841,China;91053 PLA Troops,Beijing 100070,China)

机构地区：[1]重庆大学环境与生态学院,重庆400045 [2]海军后勤部专项工程建设办公室,北京100841 [3]中国人民解放军91053部队,北京100070

出　　处：《中国给水排水》2021年第23期88-94,共7页China Water & Wastewater

摘　　要：热带离岸海岛生活污水水质及排放特点与城市的差异性较大,其氮磷含量高、C/N值低,为了进一步提升速分生化技术在处理热带离岸海岛高浓度污水中的效能,结合工程实例分析了该工艺的运行效果,解析了实际运行中存在的问题,并提出了相应的改进措施。研究结果表明,在平均进水C/N值、C/P值分别为6.1、58的条件下,当平均进水COD、氨氮、TN、TP浓度分别为441、62.65、72.56和7.80 mg/L时,相应的平均去除率分别为87.9%、90.9%、54.8%和14.9%,速分生化技术对COD和氨氮保持了较高的去除率,具有一定的TN去除能力,而对TP的去除效果较差,可见速分生化技术的脱氮除磷效果不理想。为了保障生化系统的脱氮除磷效果,建议停止调节池曝气,采取多点进水、分级控制曝气、增加强制排泥反冲洗系统和增加化学除磷等措施。Quality and discharge characteristics of domestic sewage in tropical offshore islands differ greatly from those in cities,as it has higher contents of nitrogen and phosphorus and a lower C/N ratio.To further improve the efficiency of flow-separated biochemical technology in the treatment of high concentration domestic sewage in tropical offshore islands,the operational performance of the process was analyzed combined with an engineering project,the problems existing in the actual operation were analyzed,and the corresponding improvement measures were proposed.When the average C/N ratio and C/P ratio of the influent were 6.1 and 58,and the average COD,ammonia nitrogen,TN and TP in the influent were 441 mg/L,62.65 mg/L,72.56 mg/L and 7.80 mg/L,respectively,the average removal efficiencies were 87.9%,90.9%,54.8%and 14.9%,respectively.The flow-separated biochemical technology maintained high removal efficiencies of COD and ammonia nitrogen,and had certain TN removal efficiency and a poor TP removal efficiency,indicating that the removal efficiency of nitrogen and phosphorus by the flow-separated biochemical technology was poor.To ensure the nitrogen and phosphorus removal efficiency of the biochemical system,it is recommended to stop regulating tank aeration,adopt multipoint feeding and stage controlled aeration,set backwashing systems for forced sludge discharge and adopt chemical dephosphorization.

关 键 词：速分生化技术 低C/N值 脱氮除磷 海岛 生活污水 

分 类 号：TU992[建筑科学—市政工程]