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Treatment of Phenol Wastewater by Anoxic-Aerobic Process

Author: GuoDongMin
Tutor: ZhuWenTing
School: Tianjin University
Course: Environmental Engineering
Keywords: Membrane bioreactor Phenolic wastewater Biodegradability Anoxic - aerobic process Mathematical model
CLC: X703
Type: Master's thesis
Year: 2004
Downloads: 252
Quote: 1
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Abstract


This study is divided into two stages : aerobic moving bed membrane bioreactor treatment of high concentration organic wastewater ; anoxic - aerobic biological treatment process wastewater containing phenol . Aerobic moving bed membrane bioreactor is a combination of a new biofilm ultrafiltration membrane reactor . Experimental results show that : the influent COD concentration of 400 to 6000 mg / L , the change of the total volume load in the range of 0.7 to 8.3kgCOD/m3d membrane effluent COD relatively stable , with an average 100mg / L or less . During operation of the entire process , the film relies on water purification differential pressure water , thus saving power consumption , and in this way be able to maintain a high membrane filtration , and to extend the period of use of the film . Control of the sludge concentration in the experiment are determined by the F / M value , so that the value of F / M is in the 0.2 ~ 0.4 (kgBOD 5 / kg MLVSS ยท d) right and left , with the conventional activated sludge similar . This experiment aerobic moving bed membrane bioreactor hydraulic characteristics of the aeration performance of the test , by the force of the fluid within the reactor to explain the running track of the fluid within the reactor . Anoxic - aerobic biological treatment processes , anoxic biological treatment device for composite baffle reactor , the reaction process is controlled in hydrolysis acidification stage , anoxic reactor effluent COD removal rate at the same time , BOD < sub > 5 < / sub > / COD value of basic improved , and are more than 0.50 in the subsequent aerobic treatment easier . The phenolic wastewater COD concentration in the range of 3000 to 5000 mg / L , total hydraulic retention time in the system a 46.2h ( hypoxia the 19h, aerobic 27.2h ) , the final film effluent COD of 30 to 90 mg / L , total removal rate of 98.5% to 99.5 %. Finally, the paper established a mathematical model of hypoxia baffle reactor and aerobic moving bed membrane bioreactor . Deduce the expression of the concentration of microorganisms in the reactor , and to make a comparison with the experimental analysis of the reasons for the deviation , and explains the significance of the creation mode .

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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