TY  - JOUR
A1  - Schroedter, Linda
A1  - Schneider, Roland
A1  - Remus, Lisa
A1  - Venus, Joachim
T1  - L-(+)-lactic acid from reed
BT  - comparing various resources for the nutrient provision of B. coagulans
JF  - Resources
N2  - Biotechnological production of lactic acid (LA) is based on the so-called first generation feedstocks, meaning sugars derived from food and feed crops such as corn, sugarcane and cassava. The aim of this study was to exploit the potential of a second generation resource: Common reed (Phragmites australis) is a powerfully reproducing sweet grass which grows in wetlands and creates vast monocultural populations. This lignocellulose biomass bears the possibility to be refined to value-added products, without competing with agro industrial land. Besides utilizing reed as a renewable and inexpensive substrate, low-cost nutritional supplementation was analyzed for the fermentation of thermophilicBacilluscoagulans.Various nutritional sources such as baker's and brewer's yeast, lucerne green juice and tryptone were investigated for the replacement of yeast extract. The structure of the lignocellulosic material was tackled by chemical treatment (1% NaOH) and enzymatic hydrolysis (Cellic(R)CTec2).B.coagulansDSM ID 14-300 was employed for the homofermentative conversion of the released hexose and pentose sugars to polymerizable L-(+)-LA of over 99.5% optical purity. The addition of autolyzed baker's yeast led to the best results of fermentation, enabling an LA titer of 28.3 g L(-1)and a yield of 91.6%.
KW  - lignocellulose
KW  - reed
KW  - Phragmites australis
KW  - lactic acid
KW  - Bacillus
KW  - coagulans
Y1  - 2020
U6  - https://doi.org/10.3390/resources9070089
SN  - 2079-9276
VL  - 9
IS  - 7
PB  - MDPI
CY  - Basel
ER  -