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 -