title: Simultaneous di-oxygenation and denitrification in an internal circulation baffled bioreactor.
abstract: An internal circulation baffled bioreactor was employed to realize simultaneous di-oxygenation of phthalic acid (PA) and denitrification of nitrate, which require aerobic and anoxic conditions, respectively. Adding a small concentration of succinate as an exogenous electron donor stimulated PA di-oxygenation, which produced readily oxidizable downstream products whose oxidation also enhanced denitrification of nitrate; succinate addition also stimulated denitrification. Depending on the concentration of PA, addition of 0.17 mM succinate increased the PA removal rate by 25 and 42%, while the corresponding nitrate removal rate was increased by 73 and 51%. UV/H2O2advanced oxidation of PA had the same effects as adding succinate, since succinate is generated by UV/H2O2; this acceleration effect was approximately equivalent to adding 0.17 mM succinate.
authors.affiliation: Department of Environmental Science and Engineering, College of Life and Environmental Science, Shanghai Normal University, Guilin Road 100, Shanghai, 200234, People's Republic of China.
authors.forename: Ling
authors.initials: L
authors.lastname: Jiang
authors.affiliation: Department of Environmental Science and Engineering, College of Life and Environmental Science, Shanghai Normal University, Guilin Road 100, Shanghai, 200234, People's Republic of China.
authors.forename: Yingxia
authors.initials: Y
authors.lastname: Tang
authors.affiliation: Department of Environmental Science and Engineering, College of Life and Environmental Science, Shanghai Normal University, Guilin Road 100, Shanghai, 200234, People's Republic of China.
authors.forename: Weihua
authors.initials: W
authors.lastname: Sun
authors.affiliation: Department of Environmental Science and Engineering, College of Life and Environmental Science, Shanghai Normal University, Guilin Road 100, Shanghai, 200234, People's Republic of China.
authors.forename: Na
authors.initials: N
authors.lastname: Yi
authors.affiliation: Department of Environmental Science and Engineering, College of Life and Environmental Science, Shanghai Normal University, Guilin Road 100, Shanghai, 200234, People's Republic of China. zhym@shnu.edu.cn.
authors.forename: Yongming
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing, 100084, People's Republic of China.
authors.forename: Hanchang
authors.initials: H
authors.lastname: Shi
authors.affiliation: Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, 85287-5701, USA.
authors.forename: Bruce E
authors.initials: BE
authors.lastname: Rittmann
mesh_terms: D001673:Biodegradation, Environmental / Q000528:radiation effects; D019149:Bioreactors; D058440:Denitrification / Q000528:radiation effects; D004583:Electrons; D006861:Hydrogen Peroxide / Q000494:pharmacology; D009566:Nitrates / Q000378:metabolism; D010084:Oxidation-Reduction; D010100:Oxygen / Q000378:metabolism*; D010795:Phthalic Acids / Q000378:metabolism; D013386:Succinates / Q000494:pharmacology; D014466:Ultraviolet Rays
chemical_list: D009566:Nitrates; D010795:Phthalic Acids; D013386:Succinates; C032279:phthalic acid; D006861:Hydrogen Peroxide; D010100:Oxygen
keywords: Denitrification; Di-oxygenation; Nitrate; Phthalic acid; Succinate