Mixed dye wastewater treatment in a bioelectrochemical system-centered process

Min-Hua Cui; Lei Gao; Hyung-Sool Lee; Ai-Jie Wang

doi:10.1016/j.biortech.2019.122420

Mixed dye wastewater treatment in a bioelectrochemical system-centered process

Bioresour Technol. 2020 Feb:297:122420. doi: 10.1016/j.biortech.2019.122420. Epub 2019 Nov 14.

Authors

Min-Hua Cui¹, Lei Gao², Hyung-Sool Lee³, Ai-Jie Wang⁴

Affiliations

¹ Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China.
² State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China.
³ Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West Waterloo, Ontario N2L 3G1, Canada.
⁴ State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China; Key Laboratory of Environmental Biotechnology, Research Center for Eco- Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China. Electronic address: waj0578@hit.edu.cn.

PMID: 31784248
DOI: 10.1016/j.biortech.2019.122420

Abstract

The feasibility of mixed dye wastewater treatment was evaluated with a novel integrated bioprocess that consisted of a hybrid anaerobic reactor (HAR) with a built-in bioelectrochemical system, an aerobic biofilm reactor (ABFR) and a denitrification reactor (DR). The position of the DR significantly affected chemical oxygen demand (COD) and colority in effluent, and placing the DR after the ABFR improved effluent quality probably due to minimization of the undesired autoxidation of aromatic amine in dye wastewater. The optimal integrated process of HAR + ABFR + DR efficiently treated mixed dye wastewater, and concentrations of COD and TN were decreased down to 75 ± 18 mg/L and 12.91 ± 0.31 mg/L, respectively, along with colority 48 ± 4 times. Total phosphorus reduced to below 0.5 mg/L with coagulation using poly aluminum chloride, and the effluent quality fully met the discharge standard. This comprehensive study suggests the feasibility of the BES based process for practical application to mixed dye wastewater treatment.

Keywords: Autoxidation; Bioelectrochemical system; Denitrification; Integrated wastewater treatment process; Mixed dye wastewater.

MeSH terms

Biological Oxygen Demand Analysis
Bioreactors
Nitrogen
Phosphorus
Waste Disposal, Fluid*
Wastewater*

Substances

Waste Water
Phosphorus
Nitrogen