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Effects of volatile fatty acids in biohydrogen effluent on biohythane production from palm oil mill effluent under thermophilic condition
Mamimin, Chonticha; Prasertsan, Poonsuk; Kongjan, Prawit; O-Thong, Sompong.
  • Mamimin, Chonticha; Thaksin University. Faculty of Science. Department of Biology. TH
  • Prasertsan, Poonsuk; Prince of Songkla University. Faculty of Agro-Industry. Department of Industrial Biotechnology. TH
  • Kongjan, Prawit; Prince of Songkla University. Faculty of Science and Technology. Department of Science. TH
  • O-Thong, Sompong; Thaksin University. Faculty of Science. Department of Biology. TH
Electron. j. biotechnol ; 29: 78-85, sept. 2017. tab, graf, ilus
Article in English | LILACS | ID: biblio-1017382
Responsible library: CL1.1
ABSTRACT

Background:

Biohydrogen effluent contains a high concentration of volatile fatty acid (VFA) mainly as butyric, acetic, lactic and propionic acids. The presence of various VFAs (mixture VFAs) and their cooperative effects on two-stage biohythane production need to be further studied. The effect of VFA concentrations in biohydrogen effluent of palm oil mill effluent (POME) on methane yield in methane stage of biohythane production was investigated.

Results:

The methane yield obtained in low VFA loading (0.9 and 1.8 g/L) was 15­20% times greater than that of high VFA loading (3.6 and 4.7 g/L). Butyric acid at high concentrations (8 g/L) has the individual significantly negative effect the methane production process (P b 0.05). Lactic, acetic and butyric acid mixed with propionic acid at a concentration higher than 0.5 g/L has an interaction significantly negative effect on the methanogenesis process (P b 0.05). Inhibition condition had a negative effect on both bacteria and archaea with inhibited on Geobacillus sp., Thermoanaerobacterium thermosaccharolyticum, Methanoculleus thermophilus and Methanothermobacter delfuvii resulting in low methane yield.

Conclusion:

Preventing the high concentration of butyric acid, and propionic acid in the hydrogenic effluent could enhance methane production in two-stage anaerobic digestion for biohythane production.
Subject(s)

Full text: Available Index: LILACS (Americas) Main subject: Propionates / Butyrates / Waste Water / Methane Language: English Journal: Electron. j. biotechnol Journal subject: Biotechnology Year: 2017 Type: Article / Project document Affiliation country: Thailand Institution/Affiliation country: Prince of Songkla University/TH / Thaksin University/TH

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Full text: Available Index: LILACS (Americas) Main subject: Propionates / Butyrates / Waste Water / Methane Language: English Journal: Electron. j. biotechnol Journal subject: Biotechnology Year: 2017 Type: Article / Project document Affiliation country: Thailand Institution/Affiliation country: Prince of Songkla University/TH / Thaksin University/TH