title: Characterization of a hybrid powdered activated carbon-dynamic membrane bioreactor (PAC-DMBR) process with high flux by gravity flow: Operational performance and sludge properties.
abstract: Three PAC-DMBRs were developed for wastewater treatment under different PAC dosages with biomass concentrations averaged at 2.5, 3.5 and 5.0g/L. The DMBRs could be continuously operated at 40-100L/m2h, while higher fluxes were obtained within the PAC-DMBRs with hydraulic retention times varying in 4-10h. A dose of 1g/L PAC brought about obvious improvement in the sludge particle size distribution, settling, flocculating and dewatering properties due to the formation of biological PAC, and the sludge properties were further improved at a higher PAC dose (3g/L). The addition of PAC notably shortened the DM formation time after air backwashing and enhanced pollutant removal. Moreover, under a long solid retention time (approximately 150d), the concentrations of both soluble and bound extracellular polymeric substances (EPS) decreased substantially because of the adsorption and biodegradation effects of the biological PAC. No obvious impact on biomass activity was observed with PAC addition.
authors: Key Lab of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, PR China; International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Xi'an 710055, PR China.
authors: Yisong
authors: Y
authors: Hu
authors: Key Lab of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, PR China; Key Lab of Environmental Engineering, Xi'an, Shaanxi Province 710055, PR China; International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Xi'an 710055, PR China. Electronic address: xcwang@xauat.edu.cn.
authors: Xiaochang C
authors: XC
authors: Wang
authors: Key Lab of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, PR China.
authors: Qiyuan
authors: Q
authors: Sun
authors: International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Xi'an 710055, PR China; Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia.
authors: Huu Hao
authors: HH
authors: Ngo
authors: Key Lab of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, PR China.
authors: Zhenzhen
authors: Z
authors: Yu
authors: Key Lab of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, PR China.
authors: Jialing
authors: J
authors: Tang
authors: Key Lab of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, PR China; International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Xi'an 710055, PR China.
authors: Qionghua
authors: Q
authors: Zhang
mesh_terms: D000327:Adsorption; D018533:Biomass; D019149:Bioreactors; D002606:Charcoal; D005427:Flocculation; D006112:Gravitation; D008567:Membranes, Artificial; D010316:Particle Size; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology; D018505:Waste Management / Q000379:methods; D062065:Wastewater / Q000737:chemistry*
chemical_list: D002606:Charcoal; D008567:Membranes, Artificial; D012722:Sewage; D062065:Wastewater
keywords: Filtration resistance; PAC-DMBR hybrid process; Powdered activated carbon; Sludge property; Wastewater treatment