Understanding of the contribution of the fungal treatment conditions in a wheat straw biorefinery that produces enzymes and biogas

Albornoz, Sandra; Wyman, Valentina; Palma, C.; Carvajal, Andrea

doi:10.1016/j.bej.2018.09.011

Cited by 31 publications

(8 citation statements)

References 48 publications

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“…In another study, Albornoz et al [56] found that the fungal treatment of wheat straw with Pleurotus ostreatus, was the most favorable treatment condition to produce laccase and biogas.…”

Section: Agro-waste Treatment By Laccasementioning

confidence: 99%

Laccases—Versatile Enzymes Used to Reduce Environmental Pollution

et al. 2022

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The accumulation of waste and toxic compounds has become increasingly harmful to the environment and human health. In this context, the use of laccases has become a focus of interest, due to the properties of these versatile enzymes: low substrate specificity, and water formation as a non-toxic end product. Thus, we begin our study with a general overview of the importance of laccase for the environment and industry, starting with the sources of laccases (plant, bacterial and fungal laccases), the structure and mechanism of laccases, microbial biosynthesis, and the immobilization of laccases. Then, we continue with an overview of agro-waste treatment by laccases wherein we observe the importance of laccases for the biodisponibilization of substrates and the biodegradation of agro-industrial byproducts; we then show some aspects regarding the degradation of xenobiotic compounds, dyes, and pharmaceutical products. The objective of this research is to emphasize and fully investigate the effects of laccase action on the decomposition of lignocellulosic materials and on the removal of harmful compounds from soil and water, in order to provide a sustainable solution to reducing environmental pollution.

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“…In another study, Albornoz et al [56] found that the fungal treatment of wheat straw with Pleurotus ostreatus, was the most favorable treatment condition to produce laccase and biogas.…”

Section: Agro-waste Treatment By Laccasementioning

confidence: 99%

Laccases—Versatile Enzymes Used to Reduce Environmental Pollution

et al. 2022

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“…Biogas plants can be a crucial part of future biorefinery solutions. Residue biorefineries use, for example, the organic fraction of municipal solid waste to obtain biochemicals such as polyhydroxyalkanoates [191] or lactic acid [192] or lignocellulosic biomass such as straw to generate enzymes, biohydrogen or bioethanol [193,194]. Green biorefineries convert herbaceous biomass into value-added products such as feed rich in proteins and energy, lactic acid to produce biopolymers, fiber, organic fertilizer and bioenergy [129,195,196].…”

Section: Coupling Anaerobic Digestion With Other Production Systems Omentioning

confidence: 99%

The Future Agricultural Biogas Plant in Germany: A Vision

et al. 2019

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After nearly two decades of subsidized and energy crop-oriented development, agricultural biogas production in Germany is standing at a crossroads. Fundamental challenges need to be met. In this article we sketch a vision of a future agricultural biogas plant that is an integral part of the circular bioeconomy and works mainly on the base of residues. It is flexible with regard to feedstocks, digester operation, microbial communities and biogas output. It is modular in design and its operation is knowledge-based, information-driven and largely automated. It will be competitive with fossil energies and other renewable energies, profitable for farmers and plant operators and favorable for the national economy. In this paper we discuss the required contribution of research to achieve these aims.

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“…The sequential process SSF-SSAD has been studied previously, but focused on lignin elimination (0-35%) and biogas yield improvement (−49% to +300%); all these results depending on several factors and highlighting the substrate-strain fungi interaction. [22][23][24][25][26][27][28] However, none of the previous studies has effectively evaluated the effect of the sequential process with a halfway enzyme extraction stage and the extracting agent.…”

Section: Introductionmentioning

confidence: 99%

Lignocellulosic residue valorization in a sequential process of solid‐state fermentation and solid substrate anaerobic digestion

Caroca

Elorrieta

Palma

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND Lignocellulosic residue valorization is a relevant topic because the study of residue and waste recycling is essential for circular economy development. This area is focused on treatment development for value‐added compound production. This work presents a sequential process of solid‐state fermentation (SSF) by white‐rot fungi (WRF) followed by solid substrate anaerobic digestion (SSAD) with the objective of producing bioenergy and other ancillary product. The agricultural residue from common bean pod (Phaseolus vulgaris) has never been studied for the purpose of a biorefinery concept. In addition, the intermediate stage for enzyme recovery was evaluated, comparing two extractants on their enzyme stability and effectiveness effect and the subsequence SSAD process effect. RESULTS Trametes versicolor produced the highest enzymatic activity of laccase, reaching 1588 U L−1 at 12 days of SSF. Under this condition, both extractants showed excellent enzymatic stability at 17 °C, but only the enzymes recovered with phosphate buffer were capable of the micropollutant degradation. SSF caused an increase in biodegradability of the lignocellulosic residue, providing an increase in biogas yield between 0% and 75.5%; however, high volatile solids consumption during fungal growth decreased the amount of biogas per volatile solid mass before treatment. CONCLUSION Common bean pods were successfully valorized through the sequential process by SSF of the WRF T. versicolor and SSAD, producing enzymes as a value‐added product and biogas from the remaining solids. The enzymes produced were stable and effective for micropollutant degradation when they were recovered with phosphate buffer. © 2021 Society of Chemical Industry (SCI).

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Understanding of the contribution of the fungal treatment conditions in a wheat straw biorefinery that produces enzymes and biogas

Cited by 31 publications

References 48 publications

Laccases—Versatile Enzymes Used to Reduce Environmental Pollution

Laccases—Versatile Enzymes Used to Reduce Environmental Pollution

The Future Agricultural Biogas Plant in Germany: A Vision

Lignocellulosic residue valorization in a sequential process of solid‐state fermentation and solid substrate anaerobic digestion

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