Efficient azo dye decolorization in a continuous stirred tank reactor (CSTR) with built-in bioelectrochemical system

Min-Hua Cui; Dan Cui; Lei Gao; Hao-Yi Cheng; Ai-Jie Wang

doi:10.1016/j.biortech.2016.07.135

Efficient azo dye decolorization in a continuous stirred tank reactor (CSTR) with built-in bioelectrochemical system

Bioresour Technol. 2016 Oct:218:1307-11. doi: 10.1016/j.biortech.2016.07.135. Epub 2016 Jul 30.

Authors

Min-Hua Cui¹, Dan Cui², Lei Gao¹, Hao-Yi Cheng², Ai-Jie Wang³

Affiliations

¹ State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China.
² Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
³ 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: 27497830
DOI: 10.1016/j.biortech.2016.07.135

Abstract

A continuous stirred tank reactor with built-in bioelectrochemical system (CSTR-BES) was developed for azo dye Alizarin Yellow R (AYR) containing wastewater treatment. The decolorization efficiency (DE) of the CSTR-BES was 97.04±0.06% for 7h with sludge concentration of 3000mg/L and initial AYR concentration of 100mg/L, which was superior to that of the sole CSTR mode (open circuit: 54.87±4.34%) and the sole BES mode (without sludge addition: 91.37±0.44%). The effects of sludge concentration and sodium acetate (NaAc) concentration on azo dye decolorization were investigated. The highest DE of CSTR-BES for 4h was 87.66±2.93% with sludge concentration of 12,000mg/L, NaAc concentration of 2000mg/L and initial AYR concentration of 100mg/L. The results in this study indicated that CSTR-BES could be a practical strategy for upgrading conventional anaerobic facilities against refractory wastewater treatment.

Keywords: Azo dye; Bioelectrochemical system (BES); Continuous stirred tank reactor (CSTR); Sludge concentration; Sodium acetate concentration.

MeSH terms

Azo Compounds* / analysis
Azo Compounds* / chemistry
Azo Compounds* / metabolism
Bioreactors*
Coloring Agents* / analysis
Coloring Agents* / chemistry
Coloring Agents* / metabolism
Sewage
Water Purification / methods*

Substances

Azo Compounds
Coloring Agents
Sewage