Continuous fermentation of food waste leachate for the production of volatile fatty acids and potential as a denitrification carbon source
SCIE
SCOPUS
- Title
- Continuous fermentation of food waste leachate for the production of volatile fatty acids and potential as a denitrification carbon source
- Authors
- Hakchan Kim; Jaai Kim; Seung Gu Shin; HWANG, SEOK HWAN; Changsoo Lee
- Date Issued
- 2016-05
- Publisher
- ELSEVIER SCI LTD
- Abstract
- This study investigated the simultaneous effects of hydraulic retention time (HRT) and pH on the continuous
production of VFAs from food waste leachate using response surface analysis. The response surface
approximations (R2 = 0.895, p < 0.05) revealed that pH has a dominant effect on the specific VFA production
(PTVFA) within the explored space (1–4-day HRT, pH 4.5–6.5). The estimated maximum PTVFA was
0.26 g total VFAs/g CODf at 2.14-day HRT and pH 6.44, and the approximation was experimentally validated
by running triplicate reactors under the estimated optimum conditions. The mixture of the filtrates
recovered from these reactors was tested as a denitrification carbon source and demonstrated superior
performance in terms of reaction rate and lag length relative to other chemicals, including acetate and
methanol. The overall results provide helpful information for better design and control of continuous fermentation
for producing waste-derived VFAs, an alternative carbon source for denitrification.
- Keywords
- Acidogenic fermentation; Denitrification carbon source; Food waste leachate; Response surface analysis; Volatile fatty acids
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/39284
- DOI
- 10.1016/j.biortech.2016.02.063
- ISSN
- 0960-8524
- Article Type
- Article
- Citation
- BIORESOURCE TECHNOLOGY, vol. 207, page. 440 - 445, 2016-05
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