膜生物反应器与生物接触氧化两种工艺处理食堂废水效能对比研究.pdf

Advances in Environmental Protection 环境保护前沿, 2014, 4, 53-59 Published Online December 2014 in Hans. /journal/aep /10.12677/aep.2014.46B008 The Comparative Study of Canteen Wastewater Treatment Efficiency with MBR and Biological Contact Oxidation Process Jing Li, Tingting He, Li Feng, Liqiu Zhang* Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing * Email: 1264519042@ Received: September 2014 Abstract In this paper, the actual canteen wastewater was treated with membrane bioreactor (MBR) and biological contact oxidation (BCO), and the treatment efficiency of canteen wastewater at different hydraulic retention time (6 h, 8 h, 10 h) was studied. The experimental results showed that both kinds of the two combined processes have good purification efficiencies to canteen wastewater. The animal and plant oil concentrations in the effluent of MBR and BCO process were 16.4 mg/L and 68.9 mg/L; the removal rates of animal and plant oil can reach 99.5% and 97.8%. The removal rates of COD were both above 90%, and the effluent COD concentration was at 15.7 mg/L and 21.3 mg/L. There was no big difference in the removal of NH3-N in the two kinds of combined process, and the NH3-N concentration in the effluent was below 1 mg/L. The removal rate of TP was above 80% and the TP concentration in the effluent was about 0.4 mg/L. The removal rate of TN was not ideal, only about 20%. In different HRT conditions, there was no big difference in NH3-N and TN removal rate in the two kinds of combined process, but the removal rate of TP in high HRT condi- tion was unstable. Therefore, the more suitable HRT of MBR process and BCO process was deter- mined at 6 h. Keywords Canteen Wastewater, Membran