The Effect Of Mixing On Fermentation Of Primary Solids, Glycerol, And Biodiesel Waste

Keywords

Acetic acid; Biodiesel waste fermentation; Glycerol fermentation; Prefermentation; Propionic acid; Volatile fatty acid

Abstract

The effect of mixing on volatile fatty acid (VFA) production and composition was investigated through running five identical bench-scale reactors that were filled with primary solid and dosed with either pure glycerol or biodiesel waste. Results showed that there was an inverse correlation between the mixing intensity and the VFA production. Propionic acid was the dominant VFA in all the reactors except the reactor mixed at 30 rpm. Low mixing facilitated H2 transfer between obligate H2 producing acetogens and H2 consuming acidogens in these non-methanogenic reactors. Also, in a narrower range of mixing, the total VFA production in biodiesel waste-fed reactors was considerably higher than that of pure glycerol-fed reactors.

Publication Date

3-1-2018

Publication Title

Water Science and Technology

Volume

77

Issue

5

Number of Pages

1355-1362

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.2166/wst.2018.015

Socpus ID

85044325499 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85044325499

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