title: Feasibility of using a microalgal-bacterial consortium for treatment of toxic coke wastewater with concomitant production of microbial lipids.
abstract: This study examined the feasibility of using an algal-bacterial process for removal of phenol and NH4+-N from differently diluted coke wastewater with simultaneous production of biomass. Under illumination, microalgal-bacterial (MSB) cultures performed complete phenol degradation at all dilutions of coke wastewater while sole microalgal culture (MSA) degraded a maximum of 27.3% of phenol (initial concentration: 24.0mgL-1) from 5-fold diluted wastewater. Furthermore, the MSB culture had the highest rate of NH4+-N removal (8.3mgL-1d-1) and fatty acid production (20mgL-1d-1) which were 2.3- and 1.5-fold higher than those observed in the MSA cultures, probably due to decreases in toxic organic pollutants. Multivariate analyses indicated that co-cultivation of activated sludge was directly correlated with the elevated removals of phenol and NH4+-N. In the presence of sludge, adequate dilution of the coke wastewater can maximize the effect of bacteria on NH4+-N removal and biomass production.
authors.affiliation: Freshwater Bioresources Utilization Bureau, Nakdonggang National Institute of Biological Resources, 137, Donam 2-gil, Sangju-si, Gyeongsangbuk-do 37242, Republic of Korea. Electronic address: tesia@nnibr.re.kr.
authors.forename: Byung-Gon
authors.initials: BG
authors.lastname: Ryu
authors.affiliation: Future Environmental Research Center, Korea Institute of Toxicology, Jinju 52834, Republic of Korea; Human and Environmental Toxicology Program, Korea University of Science and Technology, Daejoen 34113, Republic of Korea.
authors.forename: Jungmin
authors.initials: J
authors.lastname: Kim
authors.affiliation: Department of Civil and Environmental Engineering, KAIST, 291 Daehakno, Yuseong-gu, Daejeon 305-701, Republic of Korea.
authors.forename: Jong-In
authors.initials: JI
authors.lastname: Han
authors.affiliation: Department of Chemical and Biomolecular Engineering, KAIST, 291 Daehakno, Yuseong-gu, Daejeon 305-701, Republic of Korea; Advanced Biomass R&D Center, KAIST, 291 Daehakno, Yuseong-gu, Daejeon 305-701, Republic of Korea.
authors.forename: Ji-Won
authors.initials: JW
authors.lastname: Yang
mesh_terms: D064751:Ammonium Compounds / Q000302:isolation & purification; D001419:Bacteria / Q000254:growth & development / Q000378:metabolism*; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D018533:Biomass; D002734:Chlorophyll / Q000378:metabolism; D000077194:Chlorophyll A; D003077:Coke / Q000032:analysis*; D004952:Esters / Q000032:analysis; D005227:Fatty Acids / Q000378:metabolism; D005240:Feasibility Studies; D008055:Lipids / Q000096:biosynthesis*; D058086:Microalgae / Q000254:growth & development / Q000378:metabolism*; D009584:Nitrogen / Q000302:isolation & purification; D019800:Phenol / Q000378:metabolism; D012722:Sewage / Q000382:microbiology; D012995:Solubility; D014835:Volatilization; D062065:Wastewater / Q000382:microbiology*; D018508:Water Purification / Q000379:methods*
chemical_list: D064751:Ammonium Compounds; D002734:Chlorophyll; D000077194:Chlorophyll A; D003077:Coke; D004952:Esters; D005227:Fatty Acids; D008055:Lipids; D009584:Nitrogen; D019800:Phenol; D012722:Sewage; D062065:Wastewater
keywords: Activated sludge; Coke wastewater; Microalga; Nitrogen removal; Statistical analysis