title: Short-term and long-term effects of Zn (II) on the microbial activity and sludge property of partial nitrification process.
abstract: Autotrophic nitrogen removal was an innovative and economical nitrogen removal technology with less oxygen and no organics consumption, in which partial nitrification (PN) is the key component. It is necessary to clear the impact of metal ions on PN since the development of industry increased their opportunity for entering into wastewater. In this study, PN process was successfully started-up in an SBR, the short-term and long-term effects of Zn (II) on microbial bioactivity and the sludge adsorption ability for Zn (II) were investigated. Results suggested that low Zn (II) were favorable for AOB bioactivity, while the long-term effect also induced NOB bioactivity. The suppression threshold of Zn (II) on AOB in short-term effect was 10mgL-1, which rose to 50mgL-1in the long-term effect due to the self-adaption. The PN sludge presented prominent absorbability for zinc and performed a quadratic relation with the Zn (II) concentration.
authors.affiliation: Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China. Electronic address: zhangxiaojing@zzuli.edu.cn.
authors.forename: Xiaojing
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China.
authors.forename: Nan
authors.initials: N
authors.lastname: Zhang
authors.affiliation: Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China.
authors.forename: Kaiwei
authors.initials: K
authors.lastname: Zheng
authors.affiliation: Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China.
authors.forename: Lina
authors.initials: L
authors.lastname: Wang
authors.affiliation: Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China.
authors.forename: Guanglu
authors.initials: G
authors.lastname: Han
authors.affiliation: Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China; Key Laboratory of Pollution Treatment and Resource, China National Light Industry, Zhengzhou University of Light Industry, Zhengzhou 450001, China.
authors.forename: Hongzhong
authors.initials: H
authors.lastname: Zhang
mesh_terms: D064751:Ammonium Compounds / Q000032:analysis; D001419:Bacteria / Q000187:drug effects* / Q000378:metabolism; D019149:Bioreactors / Q000382:microbiology; D058465:Nitrification / Q000187:drug effects*; D009573:Nitrites / Q000378:metabolism; D009584:Nitrogen / Q000032:analysis; D010084:Oxidation-Reduction / Q000187:drug effects; D012722:Sewage / Q000382:microbiology*; D013997:Time Factors; D014865:Waste Disposal, Fluid; D015032:Zinc / Q000494:pharmacology*
chemical_list: D064751:Ammonium Compounds; D009573:Nitrites; D012722:Sewage; D015032:Zinc; D009584:Nitrogen
keywords: AOB; Autotrophic nitrogen removal; NOB; Partial nitrification; Zn (II)