Abstract:
:Lactic acid (LA), a versatile platform molecule, can be fermented from organic wastes, such as food waste and waste activated sludge. In this study, an efficient approach using salt, a component of food waste as an additive, was proposed to increase LA production. The LA productivity was increased at 10 g NaCl/L and optical pure L-lactate was obtained at 30 g NaCl/L. The enhancement of LA was in accordance with the increased solubilization and the critical hydrolase activities under saline conditions. Moreover, high salinity (30-50 g NaCl/L) changed the common conversion of LA to volatile fatty acids. In addition, the key LA bacteria genera (Bacillus, Enterococcus, Lactobacillus) were selectively enriched under saline conditions. Strong correlations between salinity and functional genes for L-LA production were also observed. This study provides a practical way for the enrichment of L-LA with high optical activity from organic wastes.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Li X,Sadiq S,Zhang W,Chen Y,Xu X,Abbas A,Chen S,Zhang R,Xue G,Sobotka D,Makinia Jdoi
10.1016/j.biortech.2020.124124subject
Has Abstractpub_date
2021-01-01 00:00:00pages
124124eissn
0960-8524issn
1873-2976pii
S0960-8524(20)31398-5journal_volume
319pub_type
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