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Kim, Jaai
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Continuous treatment of dairy effluent in a downflow anaerobic filter packed with slag grains: Reactor performance and kinetics

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Title
Continuous treatment of dairy effluent in a downflow anaerobic filter packed with slag grains: Reactor performance and kinetics
Author
Jo, YeadamKim, JaaiLee, Changsoo
Issue Date
2016-11
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS, v.68, pp.147 - 152
Abstract
A downflow anaerobic filter packed with blast-furnace slag (BFS) grains was evaluated for treating cheese whey, a high-strength dairy effluent. The reactor demonstrated effective and stable biomethanation of whey in continuous mode without pH control. The chemical oxygen demand (COD) removal remained at around 80%, with the reactor pH being maintained neutral without buffering, in the organic loading rate (OLR) range of 0.8-2.4 g COD/l∙d. Although the COD removal decreased down to below 60% at higher OLRs along with acid accumulation, the methane production rate continued to increase with increasing OLR. On the other hand, the methane yield was maintained at 0.28-0.34 l/g COD throughout the experiment. The substrate removal and methane production kinetics were successfully described by the modified Stover-Kincannon model. The overall results suggest that BFS grains could be used as economic filter media for anaerobic treatment of cheese whey and other easily acidifying waste streams.
URI
https://scholarworks.unist.ac.kr/handle/201301/20752
URL
http://www.sciencedirect.com/science/article/pii/S1876107016302978
DOI
10.1016/j.jtice.2016.08.021
ISSN
1876-1070
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