Alkaline textile wastewater biotreatment: A sulfate-reducing granular sludge based lab-scale study

Qian Zeng; Tianwei Hao; Hamish Robert Mackey; Li Wei; Gang Guo; Guanghao Chen

doi:10.1016/j.jhazmat.2017.03.005

Alkaline textile wastewater biotreatment: A sulfate-reducing granular sludge based lab-scale study

J Hazard Mater. 2017 Jun 15:332:104-111. doi: 10.1016/j.jhazmat.2017.03.005. Epub 2017 Mar 6.

Authors

Qian Zeng¹, Tianwei Hao², Hamish Robert Mackey³, Li Wei⁴, Gang Guo¹, Guanghao Chen⁵

Affiliations

¹ Department of Civil & Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China.
² Department of Civil & Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China; Institute for Advanced Study, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China; Water Technology Center, The Hong Kong University of Science and Technology, Hong Kong, China; Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science and Technology, Hong Kong, China; Wastewater Treatment Laboratory, FYT Graduate School, The Hong Kong University of Science and Technology, Nansha, Guangzhou, China. Electronic address: thao@connect.ust.hk.
³ College of Science and Engineering, Hamad Bin Khalifa University, Education City, Doha, Qatar.
⁴ Department of Civil & Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China; Wastewater Treatment Laboratory, FYT Graduate School, The Hong Kong University of Science and Technology, Nansha, Guangzhou, China.
⁵ Department of Civil & Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China; Water Technology Center, The Hong Kong University of Science and Technology, Hong Kong, China; Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science and Technology, Hong Kong, China; Wastewater Treatment Laboratory, FYT Graduate School, The Hong Kong University of Science and Technology, Nansha, Guangzhou, China.

PMID: 28285103
DOI: 10.1016/j.jhazmat.2017.03.005

Abstract

In this study the feasibility of treating dyeing wastewater with sulfate reducing granular sludge was explored, focusing on decolorization/degradation of azo dye (Procion Red HE-7B) and the performance of microbial consortia under alkaline conditions (pH=11). Efficiency of HE-7B degradation was influenced strongly by the chemical oxygen demand (COD) concentration which was examined in the range of 500-3000mg/L. COD removal efficiency was reduced at high COD concentration, while specific removal rate was enhanced to 17.5 mg-COD/gVSSh^-1. HE-7B removal was also improved at higher organic strength with more than 90% removal efficiency and a first-rate removal constant of 5.57h^-1 for dye degradation. Three dye-degradation metabolites were identified by HPLC-MS. The granular structure provided enhanced removal performance for HE-7B and COD in comparison to a near-identical floc SRB system and the key functional organisms were identified by high throughput sequencing. This study demonstrates an example of a niche application where SRB granules can be applied for high efficient and cost-effective treatment of a wastewater under adverse environmental conditions.

Keywords: Alkaline condition; Azo dye; Sulfate-reducing granular sludge.

Publication types

Evaluation Study

MeSH terms

Bioreactors / microbiology*
Flocculation
Industrial Waste
Microbial Consortia
Sulfur-Reducing Bacteria / metabolism*
Textile Industry
Waste Disposal, Fluid / methods*

Substances

Industrial Waste