摘要
针对双污泥(A2N)反硝化除磷工艺存在工艺冗长、氨氮出水浓度过高的固有缺陷,提出了一种双污泥耦合振动缺氧MBR反硝化脱氮除磷(A2N-VMBR)工艺。通过菌群培养,工艺启动与工艺参数优化,考察了A2N-VMBR工艺启动过程中的污染物去除特性、微生物菌群变化以及缺氧MBR(AxMBR)的运行特性。结果表明,连续运行58 d后,完成了菌群的培养和工艺启动。经工艺参数优化调控,设置超越污泥比35%~40%,回流污泥比60~70%,污泥停留时间15 d,水力停留时间16 h,AxMBR污泥浓度6000~6500 mg/L时,COD、NH4+-N、PO43--P的出水浓度分别为20.02 mg/L,3.2 mg/L,0.46 mg/L,相应的去除率为90.11%、90.96%、93.38%。AxMBR平均污染周期为79 d,具有较好的耐污染特性。16S rRNA高通量测序表明,脱氯单胞菌(Dechloromonas)、陶厄氏菌属(Thauera)、动胶菌属(Zoogloea)为主要的反硝化除磷功能菌属。综上所述,经过工艺启动和工艺参数优化,成功实现了A2N-VMBR系统的高效脱氮除磷和稳定运行,为A2N-VMBR的工程应用提供参考。
A continuous flow two-sludge system coupled(A_(2)N)vibrating anoxic MBR denitrification and phosphorus removal(A_(2)N-VMBR)processes were proposed to address the inherent defects of the A_(2)N denitrification and phosphorus removal,such as long process time and high ammonia nitrogen effluent concentration.The pollutant removal characteristics,microbial population changes and the operating characteristics of the anoxic MBR(AxMBR)during the start-up of the A_(2)N-VMBR process were investigated through colony cultivation,process start-up,and process parameter optimization.The results indicated that bacterial flora and process start-up were cultivated after 58 days of continuous operation.After optimized regulation of process parameters,the effluent concentrations of COD,NH_(4)^(+)-N,and PO_(4)^(3-)-P were 20.02 mg/L,3.2 mg/L,and 0.46 mg/L,respectively.When the beyond sludge ratio was set at 35%~40%,the return sludge ratio was 60%~70%,the sludge retention time was 15 d,the hydraulic retention time was 16 h,and the sludge concentration of AxMBR was 6000~6500 mg/L.The corresponding removal rates were 20.02 mg/L,3.2 mg/L,and 0.46 mg/L.The average contamination cycle of AxMBR was 79 days,which had good contamination tolerance.The 16S rRNA high-throughput sequencing indicated that Dechloromonas,Thauera,and Zoogloea were the main denitrifying phosphorus removal.In summary,the A_(2)N-VMBR system has the characteristics of high-efficiency denitrification,phosphorus removal,and continuous stable operation,and this paper provides a reference for the engineering application of A_(2)N-VMBR.
作者
卞晓峥
程鹏
宋博宇
赵艺豪
黄健平
BIAN Xiaozheng;CHENG Peng;Song Boyu;ZHAO Yihao;HUANG Jianping(School of Environmental and Municipal Engineering,North China University of Water Resources and Electric Power;Henan Province Water Pollution and Soil Damage Repair Engineering Technology Research Center,Zhengzhou 450046,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2023年第6期105-111,共7页
Technology of Water Treatment
基金
河南省重大科技专项(161100310700)。
