A greener way of lactic acid production from cellulose-rich waste materials utilising cellulolytic bacteria population from insect gut. (June 2022)

• Record Type: Journal Article
• Authors: Saha, Sumitra; Khatun, Fahmida; Nahiduzzaman, Md.; Mahmud, Md. Pavel; Rahman, Md. Mafiur; Yasmin, Sabina
• Is Part Of: Bioresource technology reports. Volume 18(2022)
• Publication Date: 2022-06
• Subjects: Cellulosic wastes -- Cellulose-degrading bacteria -- Lactic acid -- Insect gut -- Lactobacillus; Biomass energy -- Periodicals; Biotransformation (Metabolism) -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Waste products as fuel -- Periodicals; Waste products as fuel; Organic wastes; Factory and trade waste; Biotransformation (Metabolism); Biomass energy; Agricultural wastes; Periodicals; Electronic journals; 662.88
• DOI: 10.1016/j.biteb.2022.101021
• Languages: English
• ISSNs: 2589-014X

Abstract

Abstract: The lactic acid production potential of cellulosic wastes was tested through SSF using insect gut cellulose-degrading bacteria population isolated from Derobrachus hovorei ( Dhb ), Omocestus viridulus ( Ovb ), and Spilosoma virginica ( Svb ). SSF was carried out using Lactobacillus acidophilus (LAB) and insect gut cellulosic bacteria at 1:1 at different temperatures (30°, 37°, and 45 °C), pH (4.5, 5, and 6) and fermentation periods (24, 48, 60, and 72 h). The present study found that the optimum operational parameters for lactic acid fermentation vary with the substrate and microbial sources used. From 1% substrate used, the statistically highest lactic acid concentration for Sugarcane bagasse (16.20%), Water hyacinth (14.75%) and Grass (14.20%) was obtained after 72 h of fermentation at 30 °C and pH 5 using LAB + Ovb, LAB + Svb and LAB + Dhb, respectively. However, there were no significant differences in produced lactic acid from cellulosic wastes at constant operational parameters and microbial sources. Graphical abstract: Unlabelled Image Highlights: First study utilised cellulosic wastes and insect gut microbes for LA production. The highest (16.20%) LA through SSF was obtained from sugarcane bagasse. Combined L. acidophilus -cellulolytic bacteria increases LA production. The highest LA from water hyacinth and grass were found after 72 h at 30 °C and pH 5. Optimum parameters for LA fermentation vary with the substrates and microbes used.