title: Enhanced nitrogen removal from sludge dewatering liquor by simultaneous primary sludge fermentation and nitrate reduction in batch and continuous reactors.
abstract: In this study, a novel denitrification reactor is used to treat sludge dewatering liquor, where the co-occurrence of sludge fermentation and nitrate reduction was obtained. The system showed an efficient and stable nitrogen removal performance. When the effluent recycle ratio was 200%, TN and NH(4)(+) removal efficiency was 99.6% and 83.5%, respectively. In addition, primary sludge could be well degraded in the novel system. Over 50% volatile suspended solid (VSS) of primary sludge was utilized, and the ratio of VSS/SS declined from 0.76 to 0.39. Further investigation with batch experiments revealed that, compared to conventional sludge fermentation, the integration of denitrification and fermentation was better at carbon production as well as the control of ammonium release.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China. pyz@bjut.edu.cn
authors.forename: Yongzhen
authors.initials: Y
authors.lastname: Peng
authors.forename: Liang
authors.initials: L
authors.lastname: Zhang
authors.forename: Shujun
authors.initials: S
authors.lastname: Zhang
authors.forename: Yiping
authors.initials: Y
authors.lastname: Gan
authors.forename: Chengcheng
authors.initials: C
authors.lastname: Wu
mesh_terms: D061249:Batch Cell Culture Techniques / Q000295:instrumentation*; D019149:Bioreactors / Q000382:microbiology*; D058440:Denitrification / Q000502:physiology; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005285:Fermentation / Q000502:physiology; D009566:Nitrates / Q000302:isolation & purification / Q000378:metabolism*; D009584:Nitrogen / Q000302:isolation & purification / Q000378:metabolism*; D010084:Oxidation-Reduction; D012722:Sewage / Q000382:microbiology*; D014867:Water / Q000737:chemistry*; D014871:Water Microbiology
chemical_list: D009566:Nitrates; D012722:Sewage; D014867:Water; D009584:Nitrogen