title: Combined autotrophic nitritation and bioelectrochemical-sulfur denitrification for treatment of ammonium rich wastewater with low C/N ratio.
abstract: A novel combined autotrophic nitritation and bioelectrochemical-sulfur denitrification (CANBSD) process was developed for treatment of synthetic ammonium-rich wastewater with low carbon/nitrogen ratio. Total nitrogen removal of the CANBSD was higher than 95 %, the effluent SO4 (2-) was lower than 1280 mg L(-1), and the maximum nitrogen volumetric loading rate was 1.2 kg m(-3) day(-1) when (1) the influent NH4 (+)-N was lower than 1008 mg L(-1), (2) hydraulic retention time was between 3.7 and 32 h, (3) the DO was between 0.5 and 1.2 mg L(-1), (4) the pH was between 7.5 and 8.2, and (5) the temperature was between 28 and 30 °C. Both the NH4 (+)-N removal and conversion to NO2 (-)-N in the nitritation membrane reactor (NMBR) were maintained at about 50 %, and the residual NH4 (+)-N and accumulated NO2 (-)-N were subsequently treated in the bioelectrochemical-sulfur three-dimensional denitrification reactor. The CANBSD energy consumption was 0.13 and 3.4 kWh m(-3), respectively, for influent NH4 (+)-N of 100 and 1000 mg L(-1). The energy consumption of CANBSD was close to that of partial nitritation-ANNMMOX.
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, No. 8 Da Yang Fang, Anwai, Chaoyang District, Beijing, 100012, China. wanghy@craes.org.cn.|Research Center for Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, No. 8 Da Yang Fang, Anwai, Chaoyang District, Beijing, 100012, China. wanghy@craes.org.cn.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, No. 8 Da Yang Fang, Anwai, Chaoyang District, Beijing, 100012, China.|Research Center for Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, No. 8 Da Yang Fang, Anwai, Chaoyang District, Beijing, 100012, China.
authors.forename: Qianyu
authors.initials: Q
authors.lastname: Hang
authors.affiliation: School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.|Brook Byers Institute for Sustainable Systems, Georgia Institute of Technology, 828 West Peachtree Street NW, Atlanta, GA, 30332, USA.
authors.forename: John
authors.initials: J
authors.lastname: Crittenden
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, No. 8 Da Yang Fang, Anwai, Chaoyang District, Beijing, 100012, China.|Research Center for Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, No. 8 Da Yang Fang, Anwai, Chaoyang District, Beijing, 100012, China.
authors.forename: Yuexi
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, No. 8 Da Yang Fang, Anwai, Chaoyang District, Beijing, 100012, China.|Research Center for Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, No. 8 Da Yang Fang, Anwai, Chaoyang District, Beijing, 100012, China.
authors.forename: Quan
authors.initials: Q
authors.lastname: Yuan
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, No. 8 Da Yang Fang, Anwai, Chaoyang District, Beijing, 100012, China.|Research Center for Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, No. 8 Da Yang Fang, Anwai, Chaoyang District, Beijing, 100012, China.
authors.forename: Haitao
authors.initials: H
authors.lastname: Liu
mesh_terms: D064751:Ammonium Compounds / Q000737:chemistry*; D052818:Autotrophic Processes; D002244:Carbon / Q000737:chemistry; D058440:Denitrification; D009584:Nitrogen / Q000737:chemistry; D013455:Sulfur / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D064751:Ammonium Compounds; D002244:Carbon; D009584:Nitrogen; D013455:Sulfur; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Bioelectrochemical-sulfur; Low carbon/nitrogen ratio; Nitritation; Synthetic ammonium-rich wastewater