| 1. |
- Kumar, A. Naresh, et al.
(författare)
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Upgrading the value of anaerobic fermentation via renewable chemicals production : A sustainable integration for circular bioeconomy
- 2022
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Ingår i: Science of the Total Environment. - : Elsevier. - 0048-9697 .- 1879-1026. ; 806, part 1
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Forskningsöversikt (refereegranskat)abstract
- The single bioprocess approach has certain limitations in terms of process efficiency, product synthesis, and effective resource utilization. Integrated or combined bioprocessing maximizes resource recovery and creates a novel platform to establish sustainable biorefineries. Anaerobic fermentation (AF) is a well-established process for the transformation of organic waste into biogas; conversely, biogas CO2 separation is a challenging and cost-effective process. Biological fixation of CO2 for succinic acid (SA) mitigates CO2 separation issues and produces commercially important renewable chemicals. Additionally, utilizing digestate rich in volatile fatty acid (VFA) to produce medium-chain fatty acids (MCFAs) creates a novel integrated platform by utilizing residual organic metabolites. The present review encapsulates the advantages and limitations of AF along with biogas CO2 fixation for SA and digestate rich in VFA utilization for MCFA in a closed-loop approach. Biomethane and biohydrogen process CO2 utilization for SA production is cohesively deliberated along with the role of biohydrogen as an alternative reducing agent to augment SA yields. Similarly, MCFA production using VFA as a substrate and function of electron donors namely ethanol, lactate, and hydrogen are comprehensively discussed. A road map to establish the fermentative biorefinery approach in the framework of AF integrated sustainable bioprocess development is deliberated along with limitations and factors influencing for techno-economic analysis. The discussed integrated approach significantly contributes to promote the circular bioeconomy by establishing carbon-neutral processes in accord with sustainable development goals.
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| 2. |
- Kundariya, Nidhi, et al.
(författare)
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A review on integrated approaches for municipal solid waste for environmental and economical relevance : Monitoring tools, technologies, and strategic innovations
- 2021
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Ingår i: Bioresource Technology. - : Elsevier BV. - 0960-8524 .- 1873-2976. ; 342
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Forskningsöversikt (refereegranskat)abstract
- Rapid population growth, combined with increased industrialization, has exacerbated the issue of solid waste management. Poor management of municipal solid waste (MSW) not only has detrimental environmental consequences but also puts public health at risk and introduces several other socioeconomic problems. Many developing countries are grappling with the problem of safe disposing of large amounts of produced municipal solid waste. Unmanaged municipal solid waste pollutes the environment, so its use as a potential renewable energy source would aid in meeting both increased energy needs and waste management. This review investigates emerging strategies and monitoring tools for municipal solid waste management. Waste monitoring using high-end technologies and energy recovery from MSW has been discussed. It comprehensively covers environmental and economic relevance of waste management technologies based on innovations achieved through the integration of approaches.
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| 3. |
- Quraishi, Marzuqa, et al.
(författare)
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Exploiting microbes in the petroleum field : Analyzing the credibility of microbial enhanced oil recovery (MEOR)
- 2021
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Ingår i: Energies. - : MDPI. - 1996-1073. ; 14:15
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Forskningsöversikt (refereegranskat)abstract
- Crude oil is a major energy source that is exploited globally to achieve economic growth. To meet the growing demands for oil, in an environment of stringent environmental regulations and economic and technical pressure, industries have been required to develop novel oil salvaging techniques. The remaining ~70% of the world’s conventional oil (one-third of the available total petroleum) is trapped in depleted and marginal reservoirs, and could thus be potentially recovered and used. The only means of extracting this oil is via microbial enhanced oil recovery (MEOR). This tertiary oil recovery method employs indigenous microorganisms and their metabolic products to enhance oil mobilization. Although a significant amount of research has been undertaken on MEOR, the absence of convincing evidence has contributed to the petroleum industry’s low interest, as evidenced by the issuance of 400+ patents on MEOR that have not been accepted by this sector. The majority of the world’s MEOR field trials are briefly described in this review. However, the presented research fails to provide valid verification that the microbial system has the potential to address the identified constraints. Rather than promising certainty, MEOR will persist as an unverified concept unless further research and investigations are carried out.
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| 4. |
- Rani, Alka, et al.
(författare)
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A review on microbial products and their perspective application as antimicrobial agents
- 2021
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Ingår i: Biomolecules. - : MDPI. - 2218-273X. ; 11:12
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Forskningsöversikt (refereegranskat)abstract
- Microorganisms including actinomycetes, archaea, bacteria, fungi, yeast, and microalgae are an auspicious source of vital bioactive compounds. In this review, the existing research regard-ing antimicrobial molecules from microorganisms is summarized. The potential antimicrobial compounds from actinomycetes, particularly Streptomyces spp.; archaea; fungi including endophytic, filamentous, and marine-derived fungi, mushroom; and microalgae are briefly described. Further-more, this review briefly summarizes bacteriocins, halocins, sulfolobicin, etc., that target multiple-drug resistant pathogens and considers next-generation antibiotics. This review highlights the pos-sibility of using microorganisms as an antimicrobial resource for biotechnological, nutraceutical, and pharmaceutical applications. However, more investigations are required to isolate, separate, purify, and characterize these bioactive compounds and transfer these primary drugs into clinically approved antibiotics.
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| 5. |
- Shahid, Muhammad Kashif, et al.
(författare)
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Chapter 10 - Circular bioeconomy perspective of agro-waste-based biochar
- 2022
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Ingår i: Biomass, Biofuels, Biochemicals. - : Elsevier. - 9780323885119 ; , s. 223-243
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- This chapter focuses on the synthesis and application of agro-waste-based biochar with a perspective of circular bioeconomy. Numerous methods are known for the synthesis of biochar; however, pyrolysis of agro-waste is the highly acclaimed method for biochar production from agro-waste. Biochar production is influenced by multiple factors including nature and source of feedstock, pyrolysis conditions, and the system/device used for thermal treatment. The biochar properties enable it to be applied in several fields including wastewater treatment, soil improvement, reduction of greenhouse gas emissions, carbon sequestration, sludge improvement, etc. The commissioning and erection of production facilities nearby agro-waste production sites, can reduce the supply chain and transport, and also improve the sustainability and development of circular bioeconomy. The application of biochar in water treatment can reduce the burden on market for the production and application of expensive adsorbents and hence, the agro-waste-based green adsorbent (biochar) can enhance bio-sustainability and subsequently circular bioeconomy.
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| 6. |
- Singh, Anusuiya, et al.
(författare)
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Production of bioethanol from food waste: Status and perspectives
- 2022
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Ingår i: Bioresource Technology. - : Elsevier. - 0960-8524 .- 1873-2976. ; 360
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Tidskriftsartikel (refereegranskat)abstract
- There is an immediate global requirement for an ingenious strategy for food waste conversion to biofuels in order to replace fossil fuels with renewable resources. Food waste conversion to bioethanol could lead to a sustainable process having the dual advantage of resolving the issue of food waste disposal as well as meeting the energy requirements of the increasing population. Food waste is increasing at the rate of 1.3 billion tonnes per year, considered to be one-third of global food production. According to LCA studies discarding these wastes is detritus to the environment, therefore; it is beneficial to convert the food waste into bioethanol. The CO2 emission in this process offers zero impact on the environment as it is biogenic. Among several pretreatment strategies, hydrothermal pretreatment could be a better approach for pretreating food waste because it solubilizes organic solids, resulting in an increased recovery of fermentable sugars to produce bioenergy.
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| 7. |
- Varjani, Sunita, et al.
(författare)
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Preface
- 2022
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Ingår i: Biomass, Biofuels, Biochemicals. - : Elsevier. - 9780323885119 ; , s. xiii-xv
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 8. |
- Zhou, Yuwen, et al.
(författare)
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Production and beneficial impact of biochar for environmental application: A comprehensive review
- 2021
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Ingår i: Bioresource Technology. - : Elsevier BV. - 0960-8524 .- 1873-2976.
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Forskningsöversikt (refereegranskat)abstract
- This review focuses on a holistic view of biochar, production from feedstock’s, engineering production strategies, its applications and future prospects. This article reveals a systematic emphasis on the continuation and development of biochar and its production methods such as Physical engineering, chemical and bio-engineering techniques. In addition, biochar alternatives such as nutrient formations and surface area made it a promising cheap source of carbon-based products such as anaerobic digestion, gasification, and pyrolysis, commercially available wastewater treatment, carbons, energy storage, microbial fuel cell electrodes, and super-capacitors repair have been reviewed. This paper also covers the knowledge blanks of strategies and ideas for the future in the field of engineering biochar production techniques and application as well as expand the technology used in the circular bio-economy.
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