title: Natural light-micro aerobic condition for PSB wastewater treatment: a flexible, simple, and effective resource recovery wastewater treatment process.
abstract: Photosynthetic bacteria (PSB) have two sets of metabolic pathways. They can degrade pollutants through light metabolic under light-anaerobic or oxygen metabolic pathways under dark-aerobic conditions. Both metabolisms function under natural light-microaerobic condition, which demands less energy input. This work investigated the characteristics of PSB wastewater treatment process under that condition. Results showed that PSB had very strong adaptability to chemical oxygen demand (COD) concentration; with F/M of 5.2-248.5 mg-COD/mg-biomass, the biomass increased three times and COD removal reached above 91.5%. PSB had both advantages of oxygen metabolism in COD removal and light metabolism in resource recovery under natural light-microaerobic condition. For pollutants' degradation, COD, total organic carbon, nitrogen, and phosphorus removal reached 96.2%, 91.0%, 70.5%, and 92.7%, respectively. For resource recovery, 74.2% of C in wastewater was transformed into biomass. Especially, coexistence of light and oxygen promote N recovery ratio to 70.9%, higher than with the other two conditions. Further, 93.7% of N-removed was synthesized into biomass. Finally, CO2emission reduced by 62.6% compared with the traditional process. PSB wastewater treatment under this condition is energy-saving, highly effective, and environment friendly, and can achieve pollution control and resource recovery.
authors.affiliation: a College of Water Resource and Civil Engineering , China Agriculture University , Beijing , People's Republic of China.|b Key Laboratory of Agricultural Engineering in Structure and Environment , Ministry of Agriculture , Beijing , People's Republic of China.|c Beijing Engineering Research Center on Animal Healthy Environment , Beijing , People's Republic of China.
authors.forename: Haifeng
authors.initials: H
authors.lastname: Lu
authors.affiliation: a College of Water Resource and Civil Engineering , China Agriculture University , Beijing , People's Republic of China.|b Key Laboratory of Agricultural Engineering in Structure and Environment , Ministry of Agriculture , Beijing , People's Republic of China.|c Beijing Engineering Research Center on Animal Healthy Environment , Beijing , People's Republic of China.
authors.forename: Ting
authors.initials: T
authors.lastname: Han
authors.affiliation: d School of Environment and Natural Resources , Renmin University of China , Beijing , People's Republic of China.
authors.forename: Guangming
authors.initials: G
authors.lastname: Zhang
authors.affiliation: a College of Water Resource and Civil Engineering , China Agriculture University , Beijing , People's Republic of China.|b Key Laboratory of Agricultural Engineering in Structure and Environment , Ministry of Agriculture , Beijing , People's Republic of China.|c Beijing Engineering Research Center on Animal Healthy Environment , Beijing , People's Republic of China.
authors.forename: Shanshan
authors.initials: S
authors.lastname: Ma
authors.affiliation: e Agricultural Engineering Sciences , University of Illinois at Urbana-Champaign , Urbana , IL , USA.
authors.forename: Yuanhui
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: a College of Water Resource and Civil Engineering , China Agriculture University , Beijing , People's Republic of China.|b Key Laboratory of Agricultural Engineering in Structure and Environment , Ministry of Agriculture , Beijing , People's Republic of China.|c Beijing Engineering Research Center on Animal Healthy Environment , Beijing , People's Republic of China.
authors.forename: Baoming
authors.initials: B
authors.lastname: Li
authors.affiliation: a College of Water Resource and Civil Engineering , China Agriculture University , Beijing , People's Republic of China.|b Key Laboratory of Agricultural Engineering in Structure and Environment , Ministry of Agriculture , Beijing , People's Republic of China.|c Beijing Engineering Research Center on Animal Healthy Environment , Beijing , People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Cao
mesh_terms: D000332:Aerobiosis; D057919:Biological Oxygen Demand Analysis; D008027:Light; D010758:Phosphorus; D010788:Photosynthesis; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000382:microbiology*; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D010758:Phosphorus; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: F/M; PSB; biomass yield; carbon and nitrogen recovery; natural light-micro aerobic condition