Valorization of Waste Biomass in Fermentative Production of Cellulases: A Review

Verma, Nitin; Kumar, Vivek; Bansal, M. C.

doi:10.1007/s12649-020-01048-8

Cited by 37 publications

(9 citation statements)

References 206 publications

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“…Cellulase is normally produced using different kinds of substrates including lignocellulosic wastes arraying from wheat bran to sewage sludge . When cellulase is produced by Trichoderma in SSF, a wide spectrum of productivity, ranging from 1.5 to 24.9 U/mL, is reported, but no production was obtained by T.…”

Section: Discussionmentioning

confidence: 99%

Solid-State Fermentation of Trichoderma spp.: A New Way to Valorize the Agricultural Digestate and Produce Value-Added Bioproducts

Bulgari

Alias

Peron

et al. 2023

J. Agric. Food Chem.

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In this study, the agricultural digestate from anaerobic biogas production mixed with food wastes was used as a substrate to grow Trichoderma reesei RUT-C30 and Trichoderma atroviride Ta13 in solid-state fermentation (SSF) and produce highvalue bioproducts, such as bioactive molecules to be used as ingredients for biostimulants. The Trichoderma spp. reached their maximum growth after 6 and 3 SSF days, respectively. Both Trichoderma species were able to produce cellulase, esterase, and citric and malic acids, while T. atroviride also produced gibberellins and oxylipins as shown by ultraperformance liquid chromatography with quadrupole time-of-flight mass spectrometry (UPLC-QTOF-MS) profiling. Experimental evaluation of germination parameters highlighted a significant promotion of tomato seed germination and root elongation induced by T. atroviride crude extracts from SSF. This study suggests an innovative sustainable use of the whole digestate mixed with agro-food waste as a valuable substrate in fungal biorefineries. Here, it has been applied to produce plant growth-promoting fungi and bioactive molecules for sustainable agriculture.

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Section: Discussionmentioning

confidence: 99%

Solid-State Fermentation of Trichoderma spp.: A New Way to Valorize the Agricultural Digestate and Produce Value-Added Bioproducts

Bulgari

Alias

Peron

et al. 2023

J. Agric. Food Chem.

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“…Hydrolysis allows transforming cellulose and hemicellulose into fermentable sugars that can be used to produce value-added products [3,5]. Although this process can be carried out by using chemical hydrolysis or other physicochemical treatments, the current trend is to use lignocellulolytic enzymes such as cellulases and xylanases [7]. In the hydrolysis process, enzymes act as catalysts accelerating various reaction steps.…”

Section: Introductionmentioning

confidence: 99%

Brewer’s spent grain biotransformation to produce lignocellulolytic enzymes and polyhydroxyalkanoates in a two-stage valorization scheme

Llimós-Turet

Martínez-Avila

Marti

et al. 2020

Biomass Conv. Bioref.

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Lignocellulolytic enzymes from low-cost sources are gaining attention as a tool to reduce production costs. Such enzymes can be obtained sustainably by diverse fungal strains via solid-state fermentation (SSF) of lignocellulosic-derived residues as substrates. Besides, these enzymes allow hydrolyzing the same residue, releasing fermentable sugars that can be transformed into valueadded products. This study shows a two-stage valorization approach for the lignocellulosic leftover brewer's spent grain (BSG): first, by producing lignocellulolytic enzymes through the SSF of BSG using three fungal strains and, second, by using the selfproduced enzymes to hydrolyze the same BSG and obtaining sugar-rich hydrolysates that serve as an alternative carbon source for polyhydroxyalkanoates (PHA) production. From the evaluated set, Aspergillus niger and Thermoascus aurantiacus produced the highest xylanase activities compared with Trichoderma reesei (268 ± 24, 241 ± 10, and 150 ± 24 U per gram of dry BSG, respectively). Also, A. niger extracts resulted in the most effective for releasing sugars from BSG, obtaining up to 0.56 g per gram of dry BSG after 24 h without any pretreatment needed. Thus, the sugar-rich hydrolysate obtained with A. niger was used as a source for producing PHA by using two bacterial strains, namely, Burkholderia cepacia and Cupriavidus necator. Maximum PHA yield was achieved by using C. necator after 48 h with 9.0 ± 0.44 mg PHA•g −1 dry BSG. These results show the significant potential of BSG as raw material for obtaining value-added bioproducts and the importance of multiple valorization schemes to improve the feasibility of similar residue-based systems.

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“…Since cellulose accounts for up to 60% of the mass of lignocellulose, cellulases are the most important enzymatic group involved in its degradation [6]. The synthesis of cellulase enzyme was studied using a variety of solid substrates, including rice straw [7], Saw dust [8], water hyacinth [9], egg shell waste [10], wheat bran [11] and potato peel [12].…”

Section: Introductionmentioning

confidence: 99%

Upsurge production of cellulase from maize stover under soildstate conditions mediated by Streptomyces enissocaesilis DQ026641

Ashok¹,

Siddanna²,

Sirasagar³

et al. 2022

J Appl Biol Biotech

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Maize stover was explored as a sole substrate of carbon for the extra cellular production of cellulase under solid-state conditions by an actinobacterium, Streptomyces enissocaesilis DQ026641. The upsurge production of cellulase was optimized manually regulating important process variables such as substrate (particle size, moisture content), organism (inoculum size), physicochemical attributes (pH, temperature) and mineral salts (NaCl, MgSO 4 , FeSO 4) following one factor at a time approach. The maximum production (71.10 IU/ml) of cellulase was obtained at particle size 2 mm, moisture content 1.25%, temperature 45°C, inoculum size 1 × 10 8 and NaCl 1.5%. Enhanced production (79 IU/ml) of cellulase was achieved by following Response Surface Methodology with Centre Composite Design, considering pH 6.5, temperature 45°C and sodium chloride 1.5% as critical process variables. The quadratic impact of pH, temperature and sodium chloride significantly contributed for the production of cellulase under solid-state conditions from maize stover mediated by S. enissocaesilis DQ026641.

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Valorization of Waste Biomass in Fermentative Production of Cellulases: A Review

Cited by 37 publications

References 206 publications

Solid-State Fermentation of Trichoderma spp.: A New Way to Valorize the Agricultural Digestate and Produce Value-Added Bioproducts

Solid-State Fermentation of Trichoderma spp.: A New Way to Valorize the Agricultural Digestate and Produce Value-Added Bioproducts

Brewer’s spent grain biotransformation to produce lignocellulolytic enzymes and polyhydroxyalkanoates in a two-stage valorization scheme

Upsurge production of cellulase from maize stover under soildstate conditions mediated by Streptomyces enissocaesilis DQ026641

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