title: Effect of dissolved oxygen on heterotrophic denitrification using poly(butylene succinate) as the carbon source and biofilm carrier.
abstract: The effect of dissolved oxygen (DO) on heterotrophic denitrification using poly(butylene succinate) as the carbon source and biofilm carrier was evaluated in a lab-scale experiment. Aerated, low-oxygen, and anoxic treatment groups were set up, which had average DO concentrations of 5.2±1.0, 1.4±1.2, and 0.5±0.3 mg L(-1), respectively. The NO3(-)-N and total nitrogen (TN) removal rates in the aerated group (37.44±0.24 and 36.24±0.48 g m(-3) d(-1), respectively) were higher than those in the other two groups. There was no significant difference between the low-oxygen and anoxic groups for the NO3(-)-N or TN removal rate. Accumulation of NO2(-)-N reached 5.0 mg L(-1) in the aerated group; no nitrite accumulation was found in the other two treatment groups. Bacterial communities of the low-oxygen and anoxic groups showed high similarity and were significantly different from those of the aerated group.
authors.affiliation: College of Fisheries and Life Science of Shanghai Ocean University, Shanghai 201306, China; Shanghai Universities Knowledge Service Platform (ZF1206), Shanghai 201306, China; Research and Development Center of Aquacultural Engineering of Shanghai, Shanghai 201306, China.
authors.forename: Guozhi
authors.initials: G
authors.lastname: Luo
authors.affiliation: College of Fisheries and Life Science of Shanghai Ocean University, Shanghai 201306, China; Shanghai Universities Knowledge Service Platform (ZF1206), Shanghai 201306, China; Research and Development Center of Aquacultural Engineering of Shanghai, Shanghai 201306, China.
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.affiliation: College of Fisheries and Life Science of Shanghai Ocean University, Shanghai 201306, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Liu
authors.affiliation: College of Fisheries and Life Science of Shanghai Ocean University, Shanghai 201306, China.
authors.forename: Guimei
authors.initials: G
authors.lastname: Xu
authors.affiliation: College of Fisheries and Life Science of Shanghai Ocean University, Shanghai 201306, China; Shanghai Universities Knowledge Service Platform (ZF1206), Shanghai 201306, China; Research and Development Center of Aquacultural Engineering of Shanghai, Shanghai 201306, China. Electronic address: drizzles@163.com.
authors.forename: Hongxin
authors.initials: H
authors.lastname: Tan
mesh_terms: D001419:Bacteria / Q000378:metabolism*; D002072:Butylene Glycols / Q000378:metabolism*; D002244:Carbon / Q000378:metabolism; D017931:DNA Primers / Q000235:genetics; D058645:Denaturing Gradient Gel Electrophoresis; D058440:Denitrification / Q000502:physiology*; D052836:Heterotrophic Processes / Q000502:physiology*; D008855:Microscopy, Electron, Scanning; D010100:Oxygen / Q000378:metabolism*; D016133:Polymerase Chain Reaction; D011108:Polymers / Q000378:metabolism*; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D018508:Water Purification / Q000379:methods*
chemical_list: D002072:Butylene Glycols; D017931:DNA Primers; D011108:Polymers; D012336:RNA, Ribosomal, 16S; C089797:bionole; D002244:Carbon; D010100:Oxygen
keywords: Biodegradable polymers; Dissolved oxygen; Heterotrophic denitrification; Poly(butylene succinate)