4.8 Article

One-pot bioprocess for lactic acid production from lignocellulosic agrowastes by using ionic liquid stable Lactobacillus brevis

Journal

BIORESOURCE TECHNOLOGY
Volume 251, Issue -, Pages 268-273

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.12.056

Keywords

Lignocellulosic biomass; Lactobacillus brevis; Lactic acid; Simultaneous saccharification and co-fermentation (SSCF); Ionic liquids

Funding

  1. Ministry of Food Processing Industries (Govt. of India)
  2. National Agricultural Science Fund (Govt. of India)
  3. Indian Institute of Technology Delhi

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The lignocellulosic agro-wastes are an attractive renewable resource in biorefinery for production of value-added platform chemicals and biofuels. The study describes use of different agro-wastes as substrate for production of lactic acid, a C3-platform chemical and high demand industrial product by Lactobacillus brevis in a one-pot bioprocess. The simultaneous saccharification and co-fermentation (SSCF) process was achieved by L. brevis governed fermentation of sugars, derived from saccharification of ionic liquid pretreated feedstocks by nanoimmobilized cellulase, which was further recovered and used for consecutive cycle. The lactic acid yields of 0.22, 0.49, 0.52 g/g were obtained from cottonseed cake, wheat straw and sugarcane bagasse, respectively. The ionic liquid-tolerant L. brevis, cellulolytic reusable nanoimmobilized enzyme coupled with valorization of renewable feedstocks points towards a holistic approach for future biorefineries with sustainable production of bioproducts.

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