title: Factors affecting the performance of membrane bioreactor for piggery wastewater treatment.
abstract: This study was conducted to identify the factors affecting the performance of membrane bioreactor (MBR) for piggery wastewater treatment. The change of organic and nitrogen concentrations in piggery wastewater was studied to investigate the treatment efficiency. The increase of COD, BOD and NH(3)-N from 1150 to 2050 mg/L, 683 to 1198 mg/L and 154 to 248 mg/L has led to the decrease of treatment efficiency. Removal efficiencies of COD, BOD and NH(3)-N have decreased from 96.0% to 92.0%, 97.0% to 92.7% and 93.2% to 69.5%, respectively. The effects of biomass characteristics on membrane fouling were determined based on Pearson's correlation coefficient (r(p)). It was found that MLSS had a negative correlation with permeate flux (r(p)=-0.745, at significant level of 0.05) while sludge floc size a positive correlation (r(p)=0.731, at significant level of 0.05). MLSS and sludge floc size were found to be the dominant factors that controlled the membrane filterability while sludge viscosity, EPS, SMP and SV(30) have taken as the sub-factors affecting membrane fouling.
authors.affiliation: Department of Environmental Engineering, School of Civil and Environmental Engineering, Kumoh National Institute of Technology, Gyeongbuk 730-701, Republic of Korea.
authors.forename: Thipsuree
authors.initials: T
authors.lastname: Kornboonraksa
authors.forename: Seung Hwan
authors.initials: SH
authors.lastname: Lee
mesh_terms: D000383:Agriculture; D000818:Animals; D019149:Bioreactors / Q000382:microbiology*; D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007220:Industrial Waste / Q000517:prevention & control*; D008567:Membranes, Artificial; D008954:Models, Biological; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013552:Swine; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods
chemical_list: D007220:Industrial Waste; D008567:Membranes, Artificial