Anaerobic-Aerobic Combined System for the Biological Treatment of Azo Dye Solution Using Residual Yeast

This study aimed to investigate the treatment efficiency of a synthetic dye solution in an anaerobic-aerobic combined reactor system, using pretreated residual yeast as a nutrient source and redox mediator. The applicability of the residual yeast as a nutrient source was firstly evaluated in anaerob...

Full description

Saved in:
Bibliographic Details
Published in:Water environment research 2019-02
Main Authors: Bahia, Marina, Passos, Fabiana, Adarme, Oscar F H, Aquino, Sergio F, Silva, Silvana Q
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study aimed to investigate the treatment efficiency of a synthetic dye solution in an anaerobic-aerobic combined reactor system, using pretreated residual yeast as a nutrient source and redox mediator. The applicability of the residual yeast as a nutrient source was firstly evaluated in anaerobic batch tests. Subsequently, two continuous bench-scale treatment settings were studied: (1) an Upflow Anaerobic Sludge Blanket (UASB) reactor, followed by an activated sludge system; and (2) a UASB reactor, followed by a shallow polishing pond. The two system configurations were fed with a synthetic azo dye solution of Yellow Gold Remazol (50 mg/L) and pretreated residual yeast (350 mg/L). According to the results, the UASB/shallow polishing pond-combined reactor attained the best values of chemical oxygen demand (COD) (85%) and dye removal (23%). This article is protected by copyright. All rights reserved.
ISSN:1061-4303
DOI:10.1002/wer.1084