A novel production process for optically pure L-lactic acid from kitchen refuse using a bacterial consortium at high temperatures.

Abstract:

:We investigated L-lactic acid production in static batch fermentation of kitchen refuse using a bacterial consortium from marine-animal-resource (MAR) composts at temperatures ranging from 30 to 65 °C. At relatively low temperatures butyric acid accumulated, whereas at higher temperatures L-lactic acid was produced. In particular, fermentation at 50 °C produced 34.5 g L(-1) L-lactic acid with 90% lactic acid selectivity and 100% optical purity. Denaturing gradient gel electrophoresis indicated that dominant bacteria present in the original MAR composts diminished rapidly and Bacillus coagulans strains became the dominant contributors to L-lactic acid production at 45, 50 and 55 °C. This is the first report of the achievement of 100% optical purity of L-lactic acid using a bacterial consortium.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Tashiro Y,Matsumoto H,Miyamoto H,Okugawa Y,Pramod P,Miyamoto H,Sakai K

doi

10.1016/j.biortech.2013.07.102

subject

Has Abstract

pub_date

2013-10-01 00:00:00

pages

672-681

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(13)01170-X

journal_volume

146

pub_type

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