摘要
采用MABR膜曝气生物膜工艺对北方地区某污水处理站进行了改造,通过在原CAST工艺中增加MABR膜组件,并新建二沉池,从而实现对原生化系统的升级改造;同时,新建了高密池和V型滤池深度处理系统,以控制出水水质。MABR膜曝气生物膜工艺的改造仅新增了曝气膜组件,无需在原生化池内新增设备和土建,且膜曝气效率高、能耗低,无需新增加鼓风机,一次性投资约为850元·m^(-3),改造工期约15 d,具有改造工期短和运行成本低的优势。改造后,MABR膜曝气生物膜反应器的氨氮进水均值为39 mg·L^(-1),出水均值为3 mg·L^(-1),平均去除率为92%;TN进水均值为63 mg·L^(-1),出水均值为11 mg·L^(-1),平均去除率为83%;TP进水均值为7.5 mg·L^(-1),出水均值为0.9 mg·L^(-1),平均去除率为88%;COD进水均值为367 mg·L^(-1),出水均值为35 mg·L^(-1)。此外,结合后续的深度处理段,通过化学除磷可保持污水处理站出水TP低于0.4 mg·L^(-1)。改造后,污水处理站出水水质可稳定达到《城镇污水处理厂污染物排放标准》(GB 18918-2002)一级A标准。
MABR membrane aeration biofilm reactor process was adopted for the reconstruction of a sewage treatment station in North China.MABR membrane components were added to the original CAST process and a new secondary sedimentation tank was built to reconstruct the original biochemical system.In the meanwhile,an advanced treatment system with new high-density tanks and V-shaped filters were built to ensure the quality of the final effluent.In the establishment of the MABR membrane aeration biofilm reactor process,only new aeration membrane components were added and no new equipment and civil works were needed in the original biochemical tank.No new blowers were needed due to the high aeration efficiency and low energy consumption of the biofilm system.The one-off investment is about 850 yuan·m^(-3) and the reconstruction period was about 15 days,indicating its advantages of short reconstruction period and low operational cost.For the new membrane aeration biofilm reactor process,the mean value of ammonia nitrogen in the inflow was 39 mg·L^(-1) and its mean value in the effluent was 3 mg·L^(-1),i.e.the average removal rate was 92%.The mean value of total nitrogen(TN)in the inflow was 63 mg·L^(-1) and the mean value in the effluent was 11 mg·L^(-1),making an average removal rate of 83%.The mean value of total phosphorus(TP)in the inflow was 7.5 mg·L^(-1) and the mean value in the effluent was 0.9 mg·L^(-1),thus the average removal rate was 88%.The TP concentration in the effluent could be kept below 0.4 mg·L^(-1) by chemical phosphorus removal by the follow-up advanced treatment section.The mean value of COD in the inflow was 367 mg·L^(-1) and the mean value of effluent was 35 mg·L^(-1),i.e.the average removal rate was 90%.After the reconstruction of the treatment process,the effluent quality of the sewage treatment station stably reached the Class 1 A level of tHe Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002).
作者
魏爱书
牛晓君
WEI Aishu;NIU Xiaojun(Beijing Capital Co.Ltd.,Beijing 100144,China;Beijing Branch of Shouchuangaihua Tianjin Municipal&Environment Engineering Co.Ltd.,Beijing 100144,China;College of Environment and Energy,South China University of Technology,Guangzhou 510006,China;Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters,Ministry of Education,Guangzhou 510006,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2021年第6期2174-2180,共7页
Chinese Journal of Environmental Engineering
基金
中新国际联合研究院产业孵化项目(2018)。
关键词
MABR
膜曝气
生物膜
高氨氮
提标改造
MABR
membrane aeration
biofilm
high ammonia nitrogen
upgrade and reconstruction
