A new cutting-edge review on the bioremediation of anaerobic digestate for environmental applications and cleaner bioenergy

Eraky, Mohamed; Elsayed, Mahdy; Qyyum, Muhammad Abdul; Ai, Ping; Tawfik, Ahmed

doi:10.1016/j.envres.2022.113708

Cited by 30 publications

(11 citation statements)

References 185 publications

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“…Differently, the solid digestate fraction can be easily stored, transported, or converted into biochar, nanocellulose, or used as a biofertilizer. New technologies such as composting and vermicomposting of solid digestate have been applied to limit the environmental impacts and improve a safer application of the digestate in the field . In addition to these techniques, integrated systems that combine the use of the liquid digestate for microalgae cultivation and of the solid fraction to yield syngas and pyrochars via thermochemical processes or by further AD processes to produce biomethane, bioethanol, and biodiesel have been developed .…”

Section: Discussionmentioning

confidence: 99%

“…New technologies such as composting and vermicomposting of solid digestate have been applied to limit the environmental impacts and improve a safer application of the digestate in the field. 34 In addition to these techniques, integrated systems that combine the use of the liquid digestate for microalgae cultivation 35 and of the solid fraction to yield syngas and pyrochars via thermochemical processes 36 or by further AD processes to produce biomethane, 35 bioethanol, and biodiesel have been developed. 37 In spite of all of these efforts to find new digestate valorizations, very few studies have investigated the possible applications of digestate in fungal biorefineries, and even those are mostly for mushroom cultivation.…”

Section: ■ Discussionmentioning

confidence: 99%

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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%

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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“…The surging energy demand has triggered a revolution in biodiesel production, with various sources being utilized, ranging from oleaginous microorganisms and black soldier fly larvae to higher plants such as rapeseed, palm, and sunflowers (Asopa et al 2022;Eraky et al 2022). Chemically, biodiesel is the alkyl ester form of fatty acids.…”

Section: Transesterificationmentioning

confidence: 99%

Sustainable valorization of waste glycerol into bioethanol and biodiesel through biocircular approaches: a review

Elsayed,

Eraky,

Osman

et al. 2023

Environ Chem Lett

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Liquid biofuels like biodiesel and bioethanol are crucial in the transition to low-carbon and high-energy alternatives to fossil fuels. One significant by-product of biodiesel production is glycerol, which accounts for about 10% of the total conversion output. While waste glycerol poses challenges due to its impurities and contaminants, it also holds potential as a metabolic resource for essential cellular components in microorganisms. Crude glycerol production is reviewed, highlighting relevance in current biodiesel technologies and its biochemical composition. To efficiently utilize waste glycerol, co-valorization with low-cost substrates through biocircular platforms using various microorganisms or insects for second and third-generation oxy-biofuels has been explored. Among these, the black soldier fly larvae have demonstrated higher competitiveness for lipid contents (35–43%), making them a promising organism for recycling waste glycerol into biodiesel production, alongside microalgae and oleaginous yeast. The microbial biodiesel productivity from oleaginous yeast is notably higher (3546 kg ha−1 y−1) than soybean biodiesel (562 kg ha−1 y−1), while microalgal biodiesel productivity surpasses palm biodiesel by more than 25 times. Remarkably, black soldier fly larvae biodiesel productivity was reported to be ~ 1.7 times higher than microalgae and an impressive ~ 43 times higher than palm biodiesel. Despite their potential for biodiesel production, waste glycerol from biodiesel industry still represents a challenge because of high impurities, high viscosity, and limited direct applications in existing processes. To further enhance energy sustainability and address the challenge of waste glycerol, biocircular platforms are discussed for waste glycerol utilization with domestic wastewater sludge, lignocellulosic biomass, and protein-rich wastes. These platforms offer opportunities to create other sustainable agricultural products while minimizing their environmental footprint.

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“…Developing countries prioritize saving renewable energy from natural sources (Tawfik et al 2022c). Proton exchange membrane fuel cells are a good electricity generation technology and have recently received great attention (Eraky et al 2022). This technology enjoys low cost, environmental friendliness and high power efficiency (Huang et al 2016).…”

Section: Enhancement Of Proton Exchange Membrane In Fuel Cellsmentioning

confidence: 99%

Sulfonated graphene nanomaterials for membrane antifouling, pollutant removal, and production of chemicals from biomass: a review

et al. 2022

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Water pollution and the unsustainable use of fossil fuel derivatives require advanced catalytic methods to clean waters and to produce fine chemicals from modern biomass. Classical homogeneous catalysts such as sulfuric, phosphoric, and hydrochloric acid are highly corrosive and non-recyclable, whereas heterogeneous catalysts appear promising for lignocellulosic waste depolymerization, pollutant degradation, and membrane antifouling. Here, we review the use of sulfonated graphene and sulfonated graphene oxide nanomaterials for improving membranes, pollutant adsorption and degradation, depolymerization of lignocellulosic waste, liquefaction of biomass, and production of fine chemicals. We also discuss the economy of oil production from biomass. Sulfonated graphene and sulfonated graphene oxide display an unusual large theoretical specific surface area of 2630 m2/g, allowing the reactants to easily enter the internal surface of graphene nanosheets and to reach active acid sites. Sulfonated graphene oxide is hydrophobic and has hydrophilic groups, such as hydroxyl, carboxyl, and epoxy, thus creating cavities on the graphene nanosheet’s surface. The adsorption capacity approached 2.3–2.4 mmol per gram for naphthalene and 1-naphthol. Concerning membranes, we observe an improvement of hydrophilicity, salt rejection, water flux, antifouling properties, and pollutant removal. The nanomaterials can be reused several times without losing catalytic activity due to the high stability originating from the stable carbon–sulfur bond between graphene and the sulfonic group.

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A new cutting-edge review on the bioremediation of anaerobic digestate for environmental applications and cleaner bioenergy

Cited by 30 publications

References 185 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

Sustainable valorization of waste glycerol into bioethanol and biodiesel through biocircular approaches: a review

Sulfonated graphene nanomaterials for membrane antifouling, pollutant removal, and production of chemicals from biomass: a review

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