TY - JOUR

T1 - Techno-economic assessment of non-sterile batch and continuous production of lactic acid from food waste

AU - Peinemann, Jan

AU - Demichelis, Francesca

AU - Fiore, Silvia

AU - Pleissner, Daniel

PY - 2019/10/1

Y1 - 2019/10/1

N2 - Non-sterile lactic acid (LA) fermentation of highly viscous food waste was demonstrated in batch and continuous flow fermentations. With Streptococcus sp., an indigenous consortium, and/or applied glucoamylase, food waste was fermented without addition of external carbon or nitrogen sources. Experimental results were used for economic and energy evaluations under consideration of different catchment area sizes from 50,000 to 1,000,000 inhabitants. During batch mode, addition of glucoamylase resulted in a titer (after 24 h), yield, and productivity of 50 g L −1, 63%, and 2.93 g L −1h −1, respectively. While titer and yield were enhanced, productivity was lower during continuous operation and 69 g L −1, 86%, and 1.27 g L −1h −1 were obtained at a dilution rate of 0.44 d −1 when glucoamylase was added. Both batch and continuous flow fermentations were found economically profitable with food waste from 200,000 or more inhabitants.

AB - Non-sterile lactic acid (LA) fermentation of highly viscous food waste was demonstrated in batch and continuous flow fermentations. With Streptococcus sp., an indigenous consortium, and/or applied glucoamylase, food waste was fermented without addition of external carbon or nitrogen sources. Experimental results were used for economic and energy evaluations under consideration of different catchment area sizes from 50,000 to 1,000,000 inhabitants. During batch mode, addition of glucoamylase resulted in a titer (after 24 h), yield, and productivity of 50 g L −1, 63%, and 2.93 g L −1h −1, respectively. While titer and yield were enhanced, productivity was lower during continuous operation and 69 g L −1, 86%, and 1.27 g L −1h −1 were obtained at a dilution rate of 0.44 d −1 when glucoamylase was added. Both batch and continuous flow fermentations were found economically profitable with food waste from 200,000 or more inhabitants.

KW - Chemistry

KW - Biorefinery

KW - Fermentation

KW - Lactic acid

KW - non sterile

KW - TEA

UR - http://www.scopus.com/inward/record.url?scp=85067279604&partnerID=8YFLogxK

U2 - 10.1016/j.biortech.2019.121631

DO - 10.1016/j.biortech.2019.121631

M3 - Journal articles

C2 - 31220764

VL - 289

JO - Bioresource Technology

JF - Bioresource Technology

SN - 0960-8524

M1 - 121631

ER -