Waste Biorefinery: A New Paradigm for a Sustainable Bioelectro Economy

Mohan, S. Venkata; Butti, Sai Kishore; Amulya, K.; Dahiya, Shikha; Modestra, J. Annie

doi:10.1016/j.tibtech.2016.06.006

Cited by 100 publications

(32 citation statements)

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“…In addition, any waste generated in the process may serve as a source of new products and energy. Waste may be recovered and residual energy content extracted using technologies based on acidogenesis, bioelectrogenesis, photosynthesis, and photofermentation . The full exploitation of this system's bioprocessing capacity will make it productive and environmentally sound, encompassing bioelectro and circular economy concepts.…”

Section: Future Perspectivesmentioning

confidence: 99%

“…This enzymatic method is also consistent with the new paradigm of a sustainable bioelectro economy . Analogous to the waste biorefinery concept, enzymes can be employed in a holistic approach to lignocellulosic biomass management, integrating remediation and resource recovery (bioproducts and biofuels) through a closed‐loop bioprocess cascade, enabling the shift towards a circular, low‐carbon bioeconomy.…”

Section: Introductionmentioning

confidence: 99%

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Bringing plant cell wall‐degrading enzymes into the lignocellulosic biorefinery concept

Silva

Vaz

Filho

2017

Biofuels Bioprod Bioref

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Recent decades have seen the growth of immense interest in lignocellulosic biomass conversion technologies. This interest is motivated by their huge potential for energy and bioproduct generation and reduced dependency on non-renewable feedstocks, leading to improved air quality and reduced emission of greenhouse gases. It is in this context that the lignocellulose biorefi nery concept arises. Among the lignocellulose conversion technologies available, enzymatic conversion has emerged as a promising candidate, since it represents a biomass management approach that integrates recycling and remediation in an environmentally friendly manner. Although already in existence, biorefi neries employing enzymatic conversion of lignocellulose are at an incipient stage. There remain many operational diffi culties, resulting in a very costly overall process that is refl ected in product price, reducing market competitiveness. Therefore, much research is still needed to improve the operational and fi nancial feasibility of this process. This paper covers general biorefi nery concepts, as well as new and associated concepts, such as the circular economy, bioeconomy, and waste biorefi nery. Subsequently, the global outlook, including examples of currently existing enzyme-based lignocellulose biorefi neries and their status, is described. The main technical and economic challenges are also discussed, and various potential tools for the optimization of biomass degradation in enzyme-based biorefi neries are presented. Finally, the future perspectives for the sector are considered, and models of the ideal biorefi nery and globally integrated biorefi nery hubs are proposed. These models may contribute to the future establishment of such biorefi neries as competitive industries, consistent with the sustainable bioelectro economy paradigm. (Brazil). His research focuses on the valorization of Brazilian agroindustrial residues, mainly sugarcane bagasse, as substrate for enzyme synthesis and conversion into bioproducts. He is currently involved in the investigation of pretreatment technologies to enhance holocellulase production when employing lignocellulosic materials as substrate for filamentous fungi. Raissa P. VazRaissa P. Vaz is a PhD student at the Department of Cell Biology of the University of Brasília (Brazil). Her work is focused mainly on immobilization, characterization, and applications of lignocellulose-degrading enzymes. Edivaldo X.F. FilhoEdivaldo X.F. Filho is Professor of Biochemistry at the Department of Cell Biology of the University of Brasília (Brazil). He conducts research in the fields of biochemistry and biotechnology, investigating the production, purification, characterization, and biotechnology applications of lignocellulose-degrading enzymes from filamentous fungi.

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Section: Future Perspectivesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bringing plant cell wall‐degrading enzymes into the lignocellulosic biorefinery concept

Silva

Vaz

Filho

2017

Biofuels Bioprod Bioref

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“…On the other hand, VFAs or VOAs and other organic acids (as well as solvents) that can be produced by fermentation of organic wastes are marketable bioproducts; many can be used as building blocks in chemical synthesis, thus replacing current building blocks from fossil origin, or used for liquid biofuels production, bioelectricity generation or photofermentative bioH 2 . In addition to C1–C7 carboxylic acids, other organic acids as well as solvents could be of interest: succinic acid, HLac, pyruvic acid, malic acid, fumaric acid, 2,5‐furan dicarboxylic acid, 3‐hydroxy HPr, aspartic acid, glucaric acid, glutamic acid, itaconic acid, levulinic acid, citric acid, and C1–C7 VFA .…”

Section: Resultsmentioning

confidence: 99%

“…Thus, the issue on which – bioH 2 or organic acids – could be more sustainable from waste fermentation should be decided according to: a market analysis that identifies the types of organic acids and other fermentative organic compounds of interest in the region and warrants their use; a careful analysis that applies System Analysis tools that would complete the feasibility study. For example, life cycle assessment and life cycle costing would shed light in a more objective way on the advantages of one approach (bioH 2 ) or the other (organic acids) from DF, in terms of their impacts on the environment, health and resources, as well as the economic impacts …”

Section: Resultsmentioning

confidence: 99%

Sodium polyacrylate inhibits fermentative hydrogen production from waste diaper‐like material

Sotelo-Navarro

Poggi‐Varaldo

Turpin-Marion

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: The inhibitory effect of a moisture-absorbent sodium polyacrylate (SPA), that is commonly used in disposable diapers, on the bio-hydrogen (H 2 ) generation from waste diaper-like material (WDM) was assessed in dark fermentation studies. Three types of treatments were evaluated in batch bioreactors at 37 ∘ C: mixture of bond paper and filter paper (WDM, no SPA), SPA alone (only SPA or control), and WDM spiked with SPA [paper plus sodium polyacrylate hydrogel (WDM-SPA)]. The WDM simulated the cellulosic fraction of diaper composition. RESULTS:The units with only SPA did not produce H 2 . The WDM-SPA units exhibited H 2 production 25% lower than those of bioreactors loaded with only WDM but no SPA. Cumulative H 2 production was 0.03, 4.22 and 5.50 mmolH 2 g TS -1 for the SPA, WDM-SPA and WDM reactors, respectively (0.04, 5.90 and 8.77 mmolH 2 g VS -1 ; 0.89, 132.19 and 196.45 NmLH 2 g VS -1 ). BioH 2 generation was related to predominance of the fermentation route that produces 1 mol L -1 of butyric acid (HBu) plus 2 mol L -1 H 2 in the WDM and WDM-SPA units, as suggested by the ratio A:B (acetic: butyric acids; A:B < 0.79 mg HAc-COD mg HBu-COD -1 in both cases).CONCLUSION: It seems that this is the first documented result on the inhibitory effect of SPA on the bioH2 fermentation of cellulosic wastes. However, further research should be carried out at different levels of SPA to determine, for instance, the half-inhibition value of SPA, that is, the concentration of SPA that would cause a 50% drop in H 2 generation of the non-SPA treatment.

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“…For example, by cascading levels of extraction of, initially high-value-added chemicals and products, then bio-materials and finally 100% (aka zero waste [168,[175][176][177]) bioprocessing of residual biomass and further a CO 2 biosequestration, closed loop, zero emission bio-refinery [178][179][180].…”

Section: Zero Waste: Formation Convergence Circularity and Critiquementioning

confidence: 99%

Exploring the Phenomenon of Zero Waste and Future Cities

Hannon

Zaman

2018

Urban Science

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Abstract:The evolving phenomenon of zero waste encompasses the theory, practice, and learning of individuals, families, businesses, communities, and government organisations, responding to perceptions of crisis and failure around conventional waste management. The diverse and growing body of international zero waste experience, can be portrayed as both, an entirely new and alternative waste management paradigm, and or, interpreted as overlapping, extending, and synergetic with a general evolution towards more sustainable waste/resource management practices. Combining the terms zero and waste provokes creative, intellectual, and pragmatic tensions, which provide a contemporary axis for necessary debate and innovation in this sphere of resource management. This commentary draws on an interdisciplinary perspective and utilises some elements of the critique of zero waste, as a lens to examine and better understand this heterogeneous global community of practice. In particular, how the concept and implementation of a zero waste goal can increase community engagement and be a catalyst for the design and management of a more circular urban metabolism and hence, more adaptive, resilient, and sustainable future (zero waste) cities.

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Waste Biorefinery: A New Paradigm for a Sustainable Bioelectro Economy

Cited by 100 publications

References 11 publications

Bringing plant cell wall‐degrading enzymes into the lignocellulosic biorefinery concept

Bringing plant cell wall‐degrading enzymes into the lignocellulosic biorefinery concept

Sodium polyacrylate inhibits fermentative hydrogen production from waste diaper‐like material

Exploring the Phenomenon of Zero Waste and Future Cities

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