Anoxic-oxic Composite MBR Technology For Municipal Wastewater Treatment Study

More attention in recent years with the proble of water eutrophication, nitrogen and phosphorus removal. The membrane bioreactor (membrane. Bioreactor, the MBR) as a new and efficient sewage treatment technologies have become an increasing concern of all researchers, but the removal of nitrogen, phosphorus is difficult to achieve the increasingly stringent emission requirements, and therefore strengthen the MBR process The biological section of the nitrogen and phosphorus removal capabilities to become a hot issue for the present study. Nitrogen, phosphorus and lead to eutrophication of major pollutants, research and development of economic, efficient nutrient removal technology has become the transformation of urban sewage treatment and mentioned standard. In people committed to exploring efficient and energy-efficient water treatment technology, membrane separation technology instead of traditional gravity sedimentation tanks in two biological treatment processes consisting of membrane bioreactor (MBR) of water treatment processes, with biological treatment and membrane separation characteristics of both, and gradually being taken seriously and constantly put a higher demand for an increasingly prominent water pollution, water treatment technology used in the practice of nitrogen and phosphorus removal in urban sewage in various combinations.In this experiment, the MBR process transformation, with the composite MBR to an anoxic tank in front of the formation of the lack of oxygen-aerobic MBR, semi-soft stuffing dosing with the combination of filler biofilm formation in the composite MBR found biofilm formation time of the combination of filler, the treatment effect is better than the semi-soft stuffing. Specific inspection indicators of effluent quality of COD, NH4+-H, the TP, TN removal efficiency and stable operation, the effluent concentration of COD in the general case of18.36mg/L, ammonia nitrogen effluent concentration of4.44mg/L of TN effluent concentration of13.72mg/L, and TP effluent concentration of0.46mg/L, were able to achieve an A standard of urban sewage treatment plant emission standards (of GB18918-2002).Test sewage processing to achieve the desired effect, for data analysis of influencing factors temperature, DO, HRT, organic loading, return ratio, etc., found at a temperature of24℃, the DO of3mg/L, HRT8h organic loading of320mg/L, the return ratio of200%, where the effect and the best. At the same time, the process of MBR and other process technology analysis and comparison. The experimental results show that the anoxic-aerobic MBR technology in municipal wastewater treatment, water quality is good, but with a good nitrogen and phosphorus removal, combined with the MBR low cost and small size, with good social prospects.