Integration Approach of Anaerobic Digestion and Fermentation Process Towards Producing Biogas and Bioethanol with Zero Waste: Technical

Alrefai, Raid; Ky, Benyounis; Stokes, Joseph

doi:10.4172/2090-4541.1000243

Cited by 17 publications

(10 citation statements)

References 43 publications

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“…The consumption of fresh fruits for their refreshing taste and nutritional value has been common for a long time but the use of processed fruit products has become a fashion and is expanding due to an increase in fruit processing and preserving technologies. Industrial processing transforms fruits into commercially attractive byproducts (such as juices, jams, jellies, pickles, and natural flavors) and also generates significant amounts of different wastes such as peel, seed, pomace, pulp, stem, and others not directly used in human food but discarded as waste 8,52,53 . Although reported differently by different researchers, this accounts for nearly half of the fruit by weight.…”

Section: Tropical Fruit‐processing Waste/byproducts and Compositionmentioning

confidence: 99%

Valorization of tropical fruit‐processing wastes and byproducts for biofuel production

Gebre,

Gebremariam,

Keneni

et al. 2023

Biofuels Bioprod Bioref

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Global energy demand is expanding due to an increasing population and the use of energy‐intensive technologies. Fossil‐based energy and transportation sectors have been blamed for greenhouse gas emissions and price fluctuations. Biofuel production has been suggested as a possible solution to this problem, despite the cost of production and difficulties with the availability of feedstocks, and the food versus energy debate, which is still a challenging issue. For many decades, researchers have been investigating how to valorize low‐cost and non‐edible biomass resources, including fruit‐processing waste and its byproducts, to produce various biofuels using innovative, cost‐effective, and green technologies to overcome these challenges. However, exhaustive studies and comprehensive and structured knowledge related to the biofuel production potential of fruit waste and byproducts are lacking because most of the research that has been done so far was specific to a single fruit, location, and method. As a result, this review paper emphasizes the evaluation of the physicochemical compositions of the wastes and byproducts derived from tropical fruit production and processing to determine their suitability in the production of different biofuels via various valorization techniques. The results of the review showed that fruit waste is a potential alternative raw material for producing different biofuels, like biodiesel, biogas, biohydrogen, and fuel pellets.

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Section: Tropical Fruit‐processing Waste/byproducts and Compositionmentioning

confidence: 99%

Valorization of tropical fruit‐processing wastes and byproducts for biofuel production

Gebre,

Gebremariam,

Keneni

et al. 2023

Biofuels Bioprod Bioref

View full text Add to dashboard Cite

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“…Two principal conversion technologies are generally used for valorisation of lignocellulose in the biorefining industry and may be classified as biochemical and thermochemical. Biochemical conversion of lignocellulose involves the hydrolysis of carbohydrates to soluble sugars, followed by microbial fermentation, or by direct anaerobic digestion with/ without fermentation [47], while the thermochemical route involves direct combustion, pyrolysis, gasification or torrefaction [48].…”

Section: Lignocellulose Conversion Technologiesmentioning

confidence: 99%

Moving towards the second generation of lignocellulosic biorefineries in the EU: Drivers, challenges, and opportunities

Hassan¹,

Williams²,

Jaiswal³

2019

Renewable and Sustainable Energy Reviews

267

100

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The EU aims to achieve a variety of ambitious climate change mitigation and sustainable development goals by 2030. To deliver on this aim, the European Commission (EC) launched the bioeconomy strategy in 2012. At the heart of this policy is the concept of the sustainable Biorefinery, which is based centrally on a cost-effective conversion of lignocellulosic biomass into bioenergy and bioproducts. The first generation of biorefineries was based on utilization of edible food crops, which raised a "food vs. fuel" debate and questionable sustainability issues. To overcome this, lignocellulosic feedstock options currently being pursued range from non-food crops to agroforestry residues and wastes. Notwithstanding this, advanced biorefining is still an emerging sector, with unanswered questions relating to the choice of feedstocks, cost-effective lignocellulosic pretreatment, and identification of viable end products that will lead to sustainable development of this industry. Therefore, this review aims to provide a critical update on the possible future directions of this sector, with an emphasis on its role in the future European bioeconomy, against a background of global developments.

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“…The operational conditions of the digesters are arrived at when there is maximum methane yield. However, it is also known that the organic matter fed into the anaerobic digestion system is not fully degraded during the process and approximately 40% to 60% of carbon is converted into methane, while the remaining portion of carbon is retained in the digestate (Alrefai et al, 2017).…”

Section: Integrated Approach For Optimization Of Anaerobic Digestionmentioning

confidence: 99%

Management strategies for anaerobic digestate of organic fraction of municipal solid waste: Current status and future prospects

2019

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Anaerobic digestion has emerged as the preferred treatment for organic fraction of municipal solid waste. Digestate management strategies are devised not only for safe disposal but also to increase the value and marketability. Regulations and standards for digestate management are framed to address the pollution concerns, conserve vulnerable zones, prevent communicable diseases, and to educate on digestate storage and applications. Regulations and the desired end uses are the main drivers for the enhancement of digestate through pretreatment, in vessel cleaning, and post-digestion treatment technologies for solid and liquid fractions of digestate. The current management practice involves utilization of digestate for land application either as fertilizer or soil improver. Prospects are bright for alternative usage such as microalgal cultivation, biofuel and bioethanol production. Presently, the focus of optimization of the anaerobic digestion process is directed only towards enhancing biogas yield, ignoring the quality of digestate produced. A paradigm shift is needed in the approach from ‘biogas optimization’ to ‘integrated biogas–digestate optimization’.

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Integration Approach of Anaerobic Digestion and Fermentation Process Towards Producing Biogas and Bioethanol with Zero Waste: Technical

Cited by 17 publications

References 43 publications

Valorization of tropical fruit‐processing wastes and byproducts for biofuel production

Valorization of tropical fruit‐processing wastes and byproducts for biofuel production

Moving towards the second generation of lignocellulosic biorefineries in the EU: Drivers, challenges, and opportunities

Management strategies for anaerobic digestate of organic fraction of municipal solid waste: Current status and future prospects

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