Investigation of food waste valorization through sequential lactic acid fermentative production and anaerobic digestion of fermentation residues
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In: Bioresource Technology, Vol. 241, 01.10.2017, p. 508-516.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Investigation of food waste valorization through sequential lactic acid fermentative production and anaerobic digestion of fermentation residues
AU - Demichelis, Francesca
AU - Pleissner, Daniel
AU - Mariano, Silvia
AU - Fiore, Silvia
AU - Navarro Gutiérrez, Ivette Michelle
AU - Schneider, Roland
AU - Venus, Joachim
PY - 2017/10/1
Y1 - 2017/10/1
N2 - This work concerns the investigation of the sequential production of lactic acid (LA) and biogas from food waste (FW). LA was produced from FW using a Streptococcus sp. strain via simultaneous saccharification and fermentation (SSF) and separate enzymatic hydrolysis and fermentation (SHF). Via SHF a yield of 0.33 gLA/gFW (productivity 3.38 gLA/L·h) and via SSF 0.29 gLA/gFW (productivity 2.08 gLA/L·h) was obtained. Fermentation residues and FW underwent anaerobic digestion (3 wt% TS). Biogas yields were 0.71, 0.74 and 0.90 Nm3/kgVS for FW and residues from SSF and SHF respectively. The innovation of the approach is considering the conversion of FW into two different products through a biorefinery concept, therefore making economically feasible LA production and valorising its fermentative residues. Finally, a mass balance of three different outlines with the aim to assess the amount of LA and biogas that may be generated within different scenarios is presented.
AB - This work concerns the investigation of the sequential production of lactic acid (LA) and biogas from food waste (FW). LA was produced from FW using a Streptococcus sp. strain via simultaneous saccharification and fermentation (SSF) and separate enzymatic hydrolysis and fermentation (SHF). Via SHF a yield of 0.33 gLA/gFW (productivity 3.38 gLA/L·h) and via SSF 0.29 gLA/gFW (productivity 2.08 gLA/L·h) was obtained. Fermentation residues and FW underwent anaerobic digestion (3 wt% TS). Biogas yields were 0.71, 0.74 and 0.90 Nm3/kgVS for FW and residues from SSF and SHF respectively. The innovation of the approach is considering the conversion of FW into two different products through a biorefinery concept, therefore making economically feasible LA production and valorising its fermentative residues. Finally, a mass balance of three different outlines with the aim to assess the amount of LA and biogas that may be generated within different scenarios is presented.
KW - Chemistry
KW - Biorefinery
KW - Fermentation
KW - Lactic acid
KW - Enzymatic hydrolysis
KW - Biogas
UR - https://www.ncbi.nlm.nih.gov/pubmed/28600944
UR - http://www.sciencedirect.com/science/article/pii/S0960852417308428
U2 - 10.1016/j.biortech.2017.05.174
DO - 10.1016/j.biortech.2017.05.174
M3 - Journal articles
C2 - 28600944
VL - 241
SP - 508
EP - 516
JO - Bioresource Technology
JF - Bioresource Technology
SN - 0960-8524
ER -