Volatile fatty acids production from separately collected municipal biowaste through mixed cultures fermentation
Emilia Den Boer , Jan Den Boer , Elias Hakalehto
AbstractSubstituting the conventional crude oil-based products, such as volatile fatty acids (VFAs) derived from oil refineries by adequate substances produced in biowaste refineries triggers a lot of attention. There is also interest in combining wastewater treatment and biowaste treatment and focus it on bio-products production, other than the currently established methane fermentation. This paper summarizes investigations of VFAs generation from separately collected municipal biowaste, inoculated with anaerobic digestion plant wastewater, in a batch laboratory bioreactor with 20 L volume under varying conditions. The production of VFAs within 72 h from batch with 7.5 % TS and OLR of 21.5 g/(L·d) amounted to 11.5 g/L; 13.5 g/L and 20.5 g/L for pH 5.0; 5.5 and 6.0, respectively. The highest yield of VFAs production (0.310 g VFAs/g VSfed) was determined for pH 6.0 and OLR of 21.5 g/(L·d). Moreover, at pH 6.0 the dominating products were higher chain acids, in form of valeric and butyric acids, constituting 53 % and 41 % of the total mass of VFAs produced, which distinguishes this study from existing literature.
|Journal series||Journal of Water Process Engineering, ISSN 2214-7144, e-ISSN 2214-7144, (N/A 100 pkt)|
|Keywords in English||Volatile Fatty Acids (VFA); Biorefinery; Wastewater; Municipal biowaste|
|ASJC Classification||; ; ;|
|Score||= 100.0, 28-09-2020, ArticleFromJournal|
|Publication indicators||= 0; : 2018 = 1.165; : 2018 = 3.173 (2) - 2018=3.688 (5)|
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