TY - JOUR

T1 - Non-sterile fermentation of food waste with indigenous consortium and yeast – Effects on microbial community and product spectrum

AU - Peinemann, Jan

AU - Rhee, Chaeyoung

AU - Shin, Seung Gu

AU - Pleißner, Daniel

PY - 2020/6/1

Y1 - 2020/6/1

N2 - This work presents examples of non-sterile mixed culture fermentation of food waste with a cultivated indigenous consortium (IC) gained from food waste, which produces lactic and acetic acids, combined with Saccharomyces cerevisiae, which produces ethanol. All results are flanked by microbial analysis to monitor changes in microbial community. At pH 6 and inoculated with yeast or IC, or both mixed sugars conversion was equal to 71%, 51%, or 67%, respectively. Under pH unregulated conditions metabolic yields were 71%, 67%, or up to 81%. While final titer of acetic acid was not affected by pH (100–200 mM), ethanol and lactic acid titers were. Using mixed culture and pH 6, sugars were almost equally used for formation of ethanol and lactic acid (400–500 mM). However, under pH unregulated conditions 80% of the substrate was converted into ethanol (900–1000 mM).

AB - This work presents examples of non-sterile mixed culture fermentation of food waste with a cultivated indigenous consortium (IC) gained from food waste, which produces lactic and acetic acids, combined with Saccharomyces cerevisiae, which produces ethanol. All results are flanked by microbial analysis to monitor changes in microbial community. At pH 6 and inoculated with yeast or IC, or both mixed sugars conversion was equal to 71%, 51%, or 67%, respectively. Under pH unregulated conditions metabolic yields were 71%, 67%, or up to 81%. While final titer of acetic acid was not affected by pH (100–200 mM), ethanol and lactic acid titers were. Using mixed culture and pH 6, sugars were almost equally used for formation of ethanol and lactic acid (400–500 mM). However, under pH unregulated conditions 80% of the substrate was converted into ethanol (900–1000 mM).

KW - Acetic acid

KW - Enterococcus spp.

KW - Ethanol

KW - Lactic acid

KW - Mixed fermentation

KW - Saccharomyces cerevisiae

KW - Chemistry

UR - http://www.scopus.com/inward/record.url?scp=85081682625&partnerID=8YFLogxK

U2 - 10.1016/j.biortech.2020.123175

DO - 10.1016/j.biortech.2020.123175

M3 - Journal articles

C2 - 32192963

AN - SCOPUS:85081682625

VL - 306

JO - Bioresource Technology

JF - Bioresource Technology

SN - 0960-8524

M1 - 123175

ER -