Microbial enzyme production: Unlocking the potential of agricultural and food waste through solid-state fermentation

Khaswal, Ashutosh; Mishra, Santosh Kumar; Chaturvedi, Neha; Saini, Sonu; Pletschke, Brett; Kuhad, Ramesh Chander

doi:10.1016/j.biteb.2024.101880

Bioresource Technology Reports

2024

DOI: 10.1016/j.biteb.2024.101880

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Microbial enzyme production: Unlocking the potential of agricultural and food waste through solid-state fermentation

Ashutosh Khaswal,

Santosh Kumar Mishra,

Neha Chaturvedi

et al.

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2024

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Cited by 2 publications

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Microbial Multienzyme Viz., Pectinase, Cellulase and Amylase Production Using Fruit and Vegetable Waste as Substrate—A Review

Singh,

Soni,

Mathur

et al. 2024

Applied Microbiology

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Around 70 million metric tonnes of fruit and vegetable waste (FVW) are produced each year and are eventually discarded as wholesale garbage. Microorganisms decompose this FVW, which has led to environmental contamination, greenhouse gas emissions, and other impacts related to climate change. If FVW are used properly, they can reduce environmental damage and also boost a nation’s economy. FVW contain vast amounts of biopolymers, viz., pectin, cellulose, and starch, all of which are hydrolysed by microbes with the aid of the pectinase, cellulase, and amylase enzymes, respectively. Therefore, in light of this, the intervention of microorganisms for the production of pectinase, cellulase, and amylase could be a safe, cost-effective, and eco-friendly approach for the precise utilisation of FVW. Nowadays, thermophilic multienzymes are extracted from a group of hot spring microbes. Thermophilic multienzymes are more capable of surviving at high temperatures and have less degrading capability. Moreover, through this advancement, we can obtain vast amounts of pectinase, cellulase, and amylase enzymes within a short period of time. This microbial enzyme preparation might be helpful in food, textiles, paper, pulp, animal feed supplements, detergents, juice/pulp clarity, leather, and other related sectors.

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Microbial Multienzyme Viz., Pectinase, Cellulase and Amylase Production Using Fruit and Vegetable Waste as Substrate—A Review

Singh,

Soni,

Mathur

et al. 2024

Applied Microbiology

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Brazilian Food Waste as a Substrate for Bioethanol Production

de Abreu,

Silva,

Siqueira

et al. 2024

Foods

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Food waste (FW) is a common source of contamination, contaminating both soils and water bodies by releasing greenhouse gases. FW holds great potential for biofuel and bioproduct production, which can mitigate its environmental impact and become a valuable addition to the circular bioeconomy. Therefore, this work aimed to investigate the use of food waste as a substrate to produce fermentable sugars and bioethanol. FW was pretreated by lipid removal. Raw and treated FW was hydrolyzed by amylases. Also, FW was hydrolyzed using sulfuric acid under different residence times (20, 40, and 60 min), sulfuric acid concentrations (0.5, 1.0, and 1.5% v·v−1), solid loads (5, 10, and 15% m·v−1), and temperatures (111, 120, and 127 °C). The best reducing sugar concentration was obtained at a 1.5% concentration of sulfuric acid and a 15% solid load applied for 1 h at 127 °C. The acid hydrolysis process was more efficient (76.26% efficiency) than the enzymatic one (72.7%). Bioethanol production was carried out as static submerged fermentation, with Saccharomyces cerevisiae at 10% (humidity m·v−1) being used as the producer and the acid and enzymatic hydrolysates being used as carbon sources. Lipid removal from FW did not influence the acid or enzymatic hydrolytic processes. For fermentation, the highest bioethanol yield was obtained from the acid hydrolysate of raw FW (0.49 kg·kg glicose−1). Thus, the processes used were efficient for bioethanol production, presenting alternatives for sustainable food waste destinations and low-cost biofuel production.

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Microbial enzyme production: Unlocking the potential of agricultural and food waste through solid-state fermentation

Cited by 2 publications

References 97 publications

Microbial Multienzyme Viz., Pectinase, Cellulase and Amylase Production Using Fruit and Vegetable Waste as Substrate—A Review

Microbial Multienzyme Viz., Pectinase, Cellulase and Amylase Production Using Fruit and Vegetable Waste as Substrate—A Review

Brazilian Food Waste as a Substrate for Bioethanol Production

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