The Nitrogen and Phosphorus Removal in domestic wastewater by Hybrid UCT-MBR
The study focuses on nitrogen and phosphorus removal in domestic wastewater by a bench-scale (120L) hybrid UCT-MBR. In the process, the microfiltration membrane is coupled with a biofilm reactor, which is filled with solid elastic media in the aerobic zone. This hybrid reactor can retain high total biomass while reduce the suspended biomass to 1430～2870mg/L, therefore, membrane fouling is reduced. The study was performed under following process parameters: HRT 8～12 hours, SRT 30 days, membrane flux 10 litre/hour and air/water ratio 40:1. After 42 days, a significant biofilm was formed in the reactor. Data collected during 60-day stabilized running period showed that the average CODCr and ammonia removal efficiency was 95.7％ and 97.7％, respectively. The total phosphorus (TP) removal was better when the nitrate liquid recycle ratio was 300％, yielding 83.2％ TP removal efficiency, at the same time, the effluent total nitrogen was below 15mg/L. The results show that filling suspended media in UCT-MBR improves the nitrogen and phosphorus removal. The ability of resisting shock organic and hydraulic loadings was found higher than the traditional MBR. The simultaneous nitrification and denitrification (SND) phenomenon in the aerobic zone promotes the nitrogen removal. The effluent of the hybrid UCT-MBR can meet the national water reuse standard.
Membrane bioreactor UCT Domestic wastewater Nitrogen and phosphorus removal
HU Chaoyu LI Yafeng SHI Hongyu MENG Fanli ZHAO Xin
School of Municipal and Environmental Engineering, Shenyang JianZhu University, Shenyang 110168, Chi College of Resources & Environmental Science, Chongqing University, Chongqing 400030, China The Sixth Department, Zhengzhou Institute of Aeronautics, Zhengzhou 450015, China
国际会议
The 6th International Symposium of Asia Institute of Urban Environment(亚洲城市环境学会第六届国际会议)
长春
英文
233-237
2009-09-20（万方平台首次上网日期，不代表论文的发表时间）