Research On The Treatment Of Domestic Sewerage By Complex Membrane Aerated Bioreactor (CMABR)

In the research, the synthetic experiments on Complex Membrane Aerated Bioreactor (CMABR) were done, which including the using fillers, the technological conditions, the reaction kinetics and the membrane fouling of the domestic sewerage treatment. The results show that the main influencing factors of CMABR are the hydraulic retention time, the sludge retention time, the influent organic concentration, the pH, the ratio of gas to liquid, the dissolved oxygen and the water temperature. The optimal technological conditions for CMABR process are determined, under which the organic loading of BOD, the removal of B0D5, the removal of COD are 3 6kgBOD5/m3. d , 95⁹9%, 94⁹8% respectively. The kinetics experiments showthat the degradation velocity equation of COD in the whole system is: r_COD =0.0407 (mg/L.min) .The analysis of membrane fouling show that the the resistance of membrane module consist of three parts: the natural resistance, the membrane fouling resistance and the concentration polarization resistance. The experiment results show that the total resistance of number 1 , number 2 membrane module are 5.76 × 1012m-1 ,7.74 × 1012m-1 respectively, and the membrane fouling resistance account for 71%, 61% respectively. At the same time, the test researched several membrane cleaning methods after pollution.