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BTEX and ethanol removal in horizontal-flow anaerobic immobilized biomass reactor, under denitrifying condition

Paper ID Volume ID Publish Year Pages File Format Full-Text
36352 45129 2006 10 PDF Available
Title
BTEX and ethanol removal in horizontal-flow anaerobic immobilized biomass reactor, under denitrifying condition
Abstract

A denitrifying consortium was used as inoculum to form a biofilm in horizontal-flow anaerobic immobilized biomass reactor. The reactor was fed with hydrocarbons, separately (benzene at 13.8, 15.4 and 26.5 mg/L; toluene 30.8 mg/L; ethylbenzene 33.3 mg/L; xylene 32.1 mg/L), and also with a benzene, toluene, ethylbenzene and xylene (BTEX) mix solution of approximately 5.0 mg/L of each hydrocarbon. The hydrocarbons were dissolved in a solution containing ethanol. Organic matter removal efficiencies were of 95% with benzene and toluene amendments and about 76% with ethylbenzene, m-xylene and the BTEX-mix amendments. Hydrocarbons removal efficiencies were of 99% at an initial concentration of benzene 26.5 mg/L, toluene 30.8 mg/L, m-xylene 32.1 mg/L, ethylbenzene 33.3 mg/L and BTEX 26.5 mg/L. Microbial diversity assessed by a small portion of 16S DNA suggested the predominance of species related to the phylotypes Pseudomonas, Paracoccus and Bacteroides. This system showed to be an alternative to treating wastewater contaminated with nitrate, ethanol and hydrocarbons.

Keywords
BTEX; Ethanol; Denitrifying bacteria; HAIB reactor; Paracoccus; Pseudomonas
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BTEX and ethanol removal in horizontal-flow anaerobic immobilized biomass reactor, under denitrifying condition
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 41, Issue 6, June 2006, Pages 1391–1400
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
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Full-text PDF Download
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Any Questions? feel free to contact us