Simultaneous nitrate, nickel ions and phosphorus removal in a bioreactor containing a novel composite material

Jun Feng Su; Jing Gao; Ting Lin Huang; Yuan Ming Zhang

doi:10.1016/j.biortech.2020.123081

Simultaneous nitrate, nickel ions and phosphorus removal in a bioreactor containing a novel composite material

Bioresour Technol. 2020 Jun:305:123081. doi: 10.1016/j.biortech.2020.123081. Epub 2020 Feb 24.

Authors

Jun Feng Su¹, Jing Gao², Ting Lin Huang², Yuan Ming Zhang²

Affiliations

¹ School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; State Key Laboratory of Green Building in West China, Xi'an University of Architecture and Technology, Xi'an 710055, China. Electronic address: sjf1977518@sina.com.
² School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.

PMID: 32135349
DOI: 10.1016/j.biortech.2020.123081

Abstract

This study presents the novel composite material TMCC/PAA/SA@Fe(TPSA), a bacteria immobilized carrier for use in bioreactor systems to enhance the simultaneous removal efficiency of nitrate, Ni(II) and phosphorus. The influence of various operational factors were evaluated on the performance of nitrate, phosphorus and Ni(II) removal. Results demonstrate that under optimum conditions of an hydraulic retention time (HRT) of 8 h and pH 7.0, nitrate and phosphorus removal reached nearly 100% and 61.7%, respectively. When the initial Ni(II) concentration was 1 mg/L, approximately 100% Ni(II) removal efficiency was achieved. Furthermore, the morphology and components of the TPSA immobilized bacterial pellets were analyzed to investigate the mechanism of simultaneous nitrate, Ni(II) and phosphorus removal. Microbial metabolism was more active in the experimental reactor compared with control, although high concentrations of Ni(II) could inhibit bacterial activity.

Keywords: Community diversity; Immobilized bioreactor; Mixotrophic denitrification; Ni(II) removal; TPSA composite material.