Interactions Of Factors For Effluent Quality In The Membrane Bioreactor

With the development of social economy and the population blooming, water pollution are becoming aggravate seriously to restrain the development of national economy. Reclamation and recycling using of wastewater has become hotspot currently which conform the stream. Membrane Bioreactor (MBR) in dealing with the wastewater is superior to the traditional biological wastewater treatment. MBR has some advantage of compact structure, simple operation and management and better effulence. It becomes one of the most effective wastewater treatment technologies and has a very huge prospect.The new-type membrane module was designed in characteristic structure. The advantages of flat sheet membrane were large membrane flux, no aeration blind area. And the membrane would not break facilely. While the hollow fiber membrane had a extremly high loading density to conduct back flush. The membrane could swing freely in the water under aeration to weaken the membrane fouling. This equipment assimilated structural advantages of both hollow fiber membrane and flat sheet membrane. Then it could be used in water treatment and recycling field. It would have great development space and wide market prospect.The factorial experimental design, which involves changing all the variables from one experiment to the next, was chosen in order to estimate the influence of the different variables. The dyeing wastewater was disposed as delegate of refractory industrial effluent with batch operating by the new-type plate membrane bioreactor in this work. There are four impact factors:influent loading, duration of effluent, duration of anoxia and duration of aeration. Factorial design was introduced into the experiment plan. Then the influence of interaction of factors was studied on the condition that considered removal rate of COD, TN and membrane flux as response variables.Through a series of experiments, it is known that among the Influent Loading, Duration of Effluent, Duration of Anoxia and Duration of aeration, Influent Loading would be the most obvious factor to the removal rate of COD, and Duration of Anoxia has the most obviously impact on the removal rate of TN. The removal rate of COD and TN would be 94.3% and 81.9% respectively. And the other two factors would be more effective for the membrane flux.