title: Influence of sludge reflux ratios on biodegradation performance in a coupled landfill leachate treatment process based on UASB and submerged MBR.
abstract: This study was undertaken to investigate the effects of different sludge reflux ratios (SRRs) on the overall performance and the fouling behavior of the up-flow anaerobic sludge blanket (UASB) reactor-anoxic-membrane bioreactor (MBR). The leachate and synthetic municipal wastewater were mixed in order to improve the biodegradability of the old leachate. Results showed that excellent removal efficiencies for chemical oxygen demand (COD) and ammonia nitrogen (NH3-N) were obtained by using the integrated UASB-anoxic-MBR process. The average COD removals were 91.01%, 93.90%, and 92.67% and that of NH3-N were 98.1%, 98.5%, and 98.9% when SRRs were 100%, 300%, and 500%, respectively. The study of the membrane fouling mechanism indicated that proteins, hydrocarbons and inorganic matter are the main elements of the cake layers.
authors.affiliation: a Environmental Research Academy, North China Electric Power University , Beijing , China.
authors.forename: Bing
authors.initials: B
authors.lastname: Wang
authors.affiliation: a Environmental Research Academy, North China Electric Power University , Beijing , China.
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.affiliation: a Environmental Research Academy, North China Electric Power University , Beijing , China.
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.affiliation: a Environmental Research Academy, North China Electric Power University , Beijing , China.
authors.forename: Guo He
authors.initials: GH
authors.lastname: Huang
mesh_terms: D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D012722:Sewage / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D012722:Sewage; D014874:Water Pollutants, Chemical
keywords: Landfill leachate; membrane bioreactor; membrane fouling; sludge reflux ratio