Treatment efficiency and VFA composition of a thermophilic anaerobic contact reactor treating food industry wastewater

The objective of this study was to examine the effects of organic loading rate and hydraulic retention time on volatile fatty acid composition and treatment efficiency of high rate thermophilic anaerobic contact reactor (TACR) treating potato-chips wastewaters. The operational performance of TACR wa...

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Bibliographic Details
Published in:Journal of hazardous materials 2010-04, Vol.176 (1), p.843-848
Main Authors: Şentürk, E., İnce, M., Onkal Engin, G.
Format: Article
Language:English
Subjects:
Anaerobic contact reactors
Anaerobiosis
Applied sciences
Biodegradation, Environmental
Biological and medical sciences
Bioreactors
Biotechnology
Carboxylic Acids - analysis
Chemical engineering
Exact sciences and technology
Fatty Acids, Volatile - analysis
Food engineering
Food industries
Food Industry
Fundamental and applied biological sciences. Psychology
General aspects
General purification processes
Hydraulic retention time
Industrial Waste - prevention & control
Methods. Procedures. Technologies
Organic loading rate
Others
Pollution
Potato-chips wastewater
Reactors
Solanum tuberosum - metabolism
Thermophilic
Various methods and equipments
Volatile fatty acids
Wastewaters
Water Pollutants, Chemical - metabolism
Water Purification - methods
Water treatment and pollution
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Summary:The objective of this study was to examine the effects of organic loading rate and hydraulic retention time on volatile fatty acid composition and treatment efficiency of high rate thermophilic anaerobic contact reactor (TACR) treating potato-chips wastewaters. The operational performance of TACR was monitored from start-up by assessing chemical oxygen demand (COD) removal efficiencies, volatile fatty acid (VFA) production and biogas composition. The reactor was studied at different organic loading rates (OLRs) ranging from 0.6 to 8 kg COD/m 3 d. The COD removal efficiencies were found to be 86–97% and the methane percentage of the biogas produced was 68–89% during the OLRs studied. The approximate methane yield was found to be 0.42 m 3 CH 4/kg COD removed. The major intermediate products of anaerobic digestion were acetate, propionate, iso-butyrate, butyrate, iso-valerate, valerate, iso-caproate and caproate. The use of thermophilic anaerobic contact reactor offers a sustainable technology for the treatment of potato-chips wastewaters since high COD removal efficiencies and high methane percentage in the biogas produced can be attained even at high OLRs.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2009.11.113