Alkaline textile wastewater biotreatment

A sulfate-reducing granular sludge based lab-scale study

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

Research output: Contribution to journalArticle

13 Citations (Scopus)

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 500–3000 mg/L. COD removal efficiency was reduced at high COD concentration, while specific removal rate was enhanced to 17.5 mg-COD/g VSS h−1. HE-7B removal was also improved at higher organic strength with more than 90% removal efficiency and a first-rate removal constant of 5.57 h−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.

Original languageEnglish
Pages (from-to)104-111
Number of pages8
JournalJournal of Hazardous Materials
Volume332
DOIs
Publication statusPublished - 15 Jun 2017

Fingerprint

Biological Oxygen Demand Analysis
Textiles
Waste Water
Sewage
Chemical oxygen demand
Sulfates
Wastewater
chemical oxygen demand
sludge
sulfate
wastewater
Degradation
dye
degradation
Coloring Agents
Azo Compounds
Microbial Consortia
Dyes
Feasibility Studies
Azo dyes

Keywords

  • Alkaline condition
  • Azo dye
  • Sulfate-reducing granular sludge

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Alkaline textile wastewater biotreatment : A sulfate-reducing granular sludge based lab-scale study. / Zeng, Qian; Hao, Tianwei; Mackey, Hamish; Wei, Li; Guo, Gang; Chen, Guanghao.

In: Journal of Hazardous Materials, Vol. 332, 15.06.2017, p. 104-111.

Research output: Contribution to journalArticle

Zeng, Qian ; Hao, Tianwei ; Mackey, Hamish ; Wei, Li ; Guo, Gang ; Chen, Guanghao. / Alkaline textile wastewater biotreatment : A sulfate-reducing granular sludge based lab-scale study. In: Journal of Hazardous Materials. 2017 ; Vol. 332. pp. 104-111.
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