GAC-Amended UASB Reactor for the Stable Treatment of Toxic Textile Wastewater

A feasibility study was carried out in the laboratory for the sequential anaerobic/aerobic treatment of textile wastewater. The process units consisted of an anaerobic UASB (upflow anaerobic sludge blanket) reactor and a SCAS (semi-continuous activated sludge) reactor. A contact-sorption layer with...

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Bibliographic Details
Published in:Environmental technology 1998-11, Vol.19 (11), p.1111-1117
Main Authors: Kuai, L., De Vreese, I., Vandevivere, P., Verstraete, W.
Format: Article
Language:English
Subjects:
Activated sludge
Applied sciences
Biological and medical sciences
Biological treatment of waters
Biotechnology
colour removal
Environment and pollution
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
granular activated carbon
Industrial applications and implications. Economical aspects
Industrial wastewaters
Pollution
textile wastewater
toxic wastewater
UASB reactor
Wastewaters
Water treatment and pollution
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Summary:A feasibility study was carried out in the laboratory for the sequential anaerobic/aerobic treatment of textile wastewater. The process units consisted of an anaerobic UASB (upflow anaerobic sludge blanket) reactor and a SCAS (semi-continuous activated sludge) reactor. A contact-sorption layer with GAC (granular activated carbon) was provided at the bottom of the conventional UASB reactor. The raw textile wastewater first passed through the GAC bed and then through the sludge bed. By means of the GAC bed, the top-layer granular sludge was protected from toxicants. Biological regeneration of GAC, which was enhanced via a recycle flow, was demonstrated. The combined GAC-UASB and SCAS treatments allowed a stable performance and a COD (chemical oxygen demand) and colour removal of 98 and 95 %, respectively.
ISSN:0959-3330
1479-487X
DOI:10.1080/09593331908616769