Experimental Study On The Improved Composite MBR For Municipal Waste Treatment

Water resources is the human production and life of the most critical resources on Earth, but in recent years, serious ecological damage cause serious pollution of water resources, China is a serious water shortage in the country is the world’s per capita water resources and is one of the most lacking13countries. Serious shortage of water resources in China has been seriously affected China’s sustainable development strategy, and has been a threat to the safety of drinking water and the health of urban residents in China. Therefore, the protection and management of water resources has become nowadays society most concern. Various coping strategies also will produce, which has become one of the essential strategy to solve water scarcity in the treatment and reuse of sewage and waste.There are many ways of sewage and wastewater treatment and reuse broadly to include physical, chemical, and biological treatment methods, biological treatment method because of its small investment in post-processing gradually been widely used. MBR process is a biological treatment, the MBR process has higher processing effects, better resistance to impact load, the lower the amount of sludge, less floor space, and ease of operation and management, so that especially in many of sewage and wastewater treatment.The experimental composite MBR process and its technological transformation preceded an anaerobic tank to form anaerobic-aerobic the MBR device filler combination filler hanging membrane, membrane module using hollow fiber membrane. NH4+-N and COD removal efficiency is tested daily during the hanging film in NH4+-N removal rate reached and stabilized at about75%COD removal rate reached about75%and stable device starts normal operation. Then for a long time during the normal operation of equipment on effluent quality testing, including, COD, TN, TP. Drawn over a long period of detection and analysis of a large number of detection data process effluent COD average17.54mg/L, the effluent NH4+-N the average to4.35mg/L, the effluent TN average to13.2mg/L effluent TP average value of0.43mg/L, have reached an A standard of water quality.The experiment by changing one of the environmental factors in order to test achieve better processing effects, and to determine the best operating conditions for this process, every kind of environmental factors in order to determine the effect of the treatment process. After a long trial data detection to determine the optimum operating conditions in the test:dissolved oxygen content of about3mg/L, hydraulic retention time of8hours, the temperature about25℃, the organic load of about310mg/L, the mixture reflux ratio in200%. During this period will also be improved composite MBR process and some of the traditional biological treatment processes comparison and analysis of the economic cost and practicality of the process.After the end of the experiment and data collation analysis of the following conclusions:the anaerobic-aerobic MBR process for municipal sewage and waste are higher treatment effect, better water quality, and the Phosphorus Removal and MBR process has good resistance to shock loading, lower amount of sludge, small footprint, ease of operation and management, it has a very competitive and very good prospects for the use.