title: Performance, 5-aminolevulinic acid (ALA) yield and microbial population dynamics in a photobioreactor system treating soybean wastewater: Effect of hydraulic retention time (HRT) and organic loading rate (OLR).
abstract: Effects of hydraulic retention time (HRT) and influent organic loading rate (OLR) were investigated in a photobioreactor containing PNSB (Rhodobacter sphaeroides)-chemoheterotrophic bacteria to treat soybean wastewater. Pollutants removal, biomass production and ALA yield in different phases were investigated in together with functional microbial population dynamics. The results showed that proper HRT and OLR increased the photobioreactor performance including pollutants removal, biomass and ALA productions. 89.5% COD, 90.6% TN and 91.2% TP removals were achieved as well as the highest biomass production of 2655mg/L and ALA yield of 7.40mg/g-biomass under the optimal HRT of 60h and OLR of 2.48g/L/d. In addition, HRT and OLR have important impacts on PNSB and total bacteria dynamics.
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Shuli
authors.initials: S
authors.lastname: Liu
authors.affiliation: School of Environment and Resource, Renmin University of China, Beijing 100872, China; School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China. Electronic address: zgm@ruc.edu.cn.
authors.forename: Guangming
authors.initials: G
authors.lastname: Zhang
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Xiangkun
authors.initials: X
authors.lastname: Li
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Jianzheng
authors.initials: J
authors.lastname: Li
mesh_terms: D000622:Aminolevulinic Acid / Q000302:isolation & purification*; D001673:Biodegradation, Environmental; D018533:Biomass; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D009930:Organic Chemicals / Q000737:chemistry*; D010084:Oxidation-Reduction; D058433:Photobioreactors / Q000382:microbiology*; D012242:Rhodobacter sphaeroides / Q000378:metabolism*; D013025:Glycine max / Q000737:chemistry*; D013997:Time Factors; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods
chemical_list: D000622:Aminolevulinic Acid; D009930:Organic Chemicals; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: ALA yield; Hydraulic retention time; Organic loading rate; Photobioreactor; Soybean wastewater