title: Aerobic SMBR/reverse osmosis system enhanced by Fenton oxidation for advanced treatment of old municipal landfill leachate.
abstract: A novel combined process of Fenton oxidation, submerged membrane bioreactor (SMBR) and reverse osmosis (RO) was applied as an appropriate option for old municipal landfill leachate treatment. Fenton process was designed to intensively solve the problem of non-biodegradable organic pollutant removal and low biodegradability of leachate, although the removal of ammonia-nitrogen was similar to 10%. After SMBR treatment, it not only presented a higher removal efficiency of organics, but also exhibited high ammonia-nitrogen removal of 80% on average. The variation of extracellular polymeric substance (EPS) content, zeta potential, and particle size of flocs after Fenton effluent continually fed in SMBR was found to be benefit for alleviating membrane fouling. Finally, three kinds of RO membranes (RE, CPA, and BW) were applied to treat SMBR effluents and successfully met wastewater re-utilization requirement. Compared with simple RO process, the troublesome membrane fouling can be effectively reduced in the combined process.
authors.affiliation: College of Chemical Engineering and Material Science, Zhejiang University of Technology, Hangzhou 310014, PR China. guoliangz@zjut.edu.cn
authors.forename: Guoliang
authors.initials: G
authors.lastname: Zhang
authors.forename: Lei
authors.initials: L
authors.lastname: Qin
authors.forename: Qin
authors.initials: Q
authors.lastname: Meng
authors.forename: Zheng
authors.initials: Z
authors.lastname: Fan
authors.forename: Dexin
authors.initials: D
authors.lastname: Wu
mesh_terms: D000332:Aerobiosis; D008567:Membranes, Artificial; D009995:Osmosis; D010084:Oxidation-Reduction; D010539:Permeability; D012722:Sewage; D064091:Waste Disposal Facilities; D014873:Water Pollutants / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D008567:Membranes, Artificial; D012722:Sewage; D014873:Water Pollutants
keywords: Advanced treatment; Fenton oxidation; Landfill leachate; Reverse osmosis (RO); Submerged membrane bioreactor (SMBR)