Innovative Application Of Nonwoven Modified Carbon Tube Aerated Membranes To Enhance Anaerobic Baffled Reactor For Wastewater Treatment

Membrane aerated biofilm reactor is a new technology against the existing membranebioreactor and its shortcomings. With less aeration, integration of nitrification anddenitrification, small amount of sludge, convenient operation and management, it is theabsorption of the membrane technology and biofilm technology. Anaerobic baffled reactor issimple in structure, with strong ability of sludge retention, and higher stability. It has beenwidely used in all kinds of high, medium and low concentration of organic wastewatertreatment since 1980s. But at the same time there are also some shortcomings to beovercomed, such as the high concentrations of effluent COD, no capabilities of denitrification.This paper is based on the analysis, review, sublation of advantages and disadvantages ofMABR and ABR, and membrane aeration biofilm (MAB) can improve the effectiveness ofanaerobic biological treatment. The carbon membrane aeration is initiated in ABR in order todevelop a new type hybrid biological reactor to treat high/medium and concentration oforganic wastewater. Capabilities of ABR is strengthened, eventually organic carbon andnitrogen are removed simultaneously.This paper included two aspects: nonwoven modified carbon membrane aerated biofilmreactor treated municipal wastewater and innovative application of carbon membrane aerationenhanced anaerobic baffled reactor for wastewater treatment.In part 1, oxygen supply rate of carbon membrane module was studied; biofilm hanging,non-woven fabrics for the adsorption capacity of activated sludge was studied, and theimprovement of capacity of membrane hanging of carbon membrane modules as biofilmcarrier was studied; NH₄⁺-N, TN and COD removal were studied by decreasingintra-membrane pressure gradually.Part2, carbon membrane module wrapped with non-woven fabrics was initiated in thereactor which effective volume was 3.5 L, the capability of removal of N and COD wasstudied under various intra-membrane pressure, new type hybrid biological reactor wasdeveloped by initiating the carbon membrane aeration in ABR which was augmented withcarbon aerated membranes after the realization of simultaneous nitrification anddenitrification to improve wastewater treatment by removing COD, NH₄⁺-N and TN. The results showed that the capability of membrane module as microorganism carrier wasenhanced greatly; under the conditions HRT of 8h and carbon nitrogen ratio of 5,simultaneous nitrification and denitrification took place, and optimal simultaneousnitrification and denitrification efficiency was achieved when intra membrane pressure was0.024 MPa, TN removal was above 90%.On the conditions of intra-membrane pressure of 0.025 MPa, HRT=24 h, influent COD2000 mg/L, NH₄⁺-N 50 mg/L, simultaneous nitrification and denitrification was happened,and COD and NH₄⁺-N decreaseed from 156 mg/L,36 mg/L to 45 mg/L,6 mg/L respectivelyafter the membrane aeration with biofilm was initiated in the third compartment of ABR. TNremoval reached 87.66%, and VFA was decreased by 77.12%.