Digestate: The Coproduct of Biofuel Production in a Circular Economy, and New Results for Cassava Peeling Residue Digestate

Aso, Sammy N.

doi:10.5772/intechopen.91340

Cited by 9 publications

(10 citation statements)

References 75 publications

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“…AD was probably recognized in a scientific sense about 392 years ago in 1630, when Jan Baptist van Helmont (1580-1644), observed that decomposing organic matter produced combustible gas; and during 1804-1808 John Dalton and Humphrey Davy established that the combustibility of the gas was due to the presence of methane [94,95]. Today, AD is carried out within artificial environments named digesters, which are designed to optimize the process [96][97][98]. The combustible gas is called biogas, and the watery sludge, digestate.…”

Section: Anaerobic Digestion (Ad) Technologymentioning

confidence: 99%

“…Biogas is composed of methane (40-75%), carbon dioxide (25-40%), and trace contaminants (≈ 0.1-3%). Digestate is rich in plant growth macronutrients; with their quantities and micronutrients contents related to the quality of the feedstock [98,99]. Digestate attributes, AD's technical feasibilities, types of feedstocks utilized (virtually all organic matter), limitations, advantages, benefits, applications, and much more have been presented in the literature [83,96,98,[100][101][102].…”

Section: Anaerobic Digestion (Ad) Technologymentioning

confidence: 99%

“…Digestate is rich in plant growth macronutrients; with their quantities and micronutrients contents related to the quality of the feedstock [98,99]. Digestate attributes, AD's technical feasibilities, types of feedstocks utilized (virtually all organic matter), limitations, advantages, benefits, applications, and much more have been presented in the literature [83,96,98,[100][101][102]. AD may be now considered a mature technology that could help humanity decarbonize industries, supplant inorganic fertilizers, and address waste management shortcomings.…”

Section: Anaerobic Digestion (Ad) Technologymentioning

confidence: 99%

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Dialing Back the Doomsday Clock with Circular Bioeconomy

N. Aso

2024

From Biomass to Biobased Products

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Present day status of planet earth is perilous. In January 2023, the “Doomsday Clock” (a serving global indicator for worldwide catastrophe) crept up to 90 seconds before midnight. According to the bulletin of atomic scientists, the Doomsday Clock aims to designate humanity’s closeness to annihilation; with midnight being the instance of ignition and thus, the point of no return from Armageddon. Because 90 seconds is the closest the clock has ever been to midnight, the year 2023 is therefore, planet earth’s nearest to Armageddon. But why is planet earth perilously close to extinction? The bulletin of atomic scientists cited threats from War; Disease; Climate change; and Disruptive technologies as major contributors. In the context of climate change mitigation, this chapter attempts to present contributions of the circular bioeconomy paradigm that could help humanity to dial back the Doomsday Clock. Anaerobic digestion (AD), integrated regenerative agriculture (IRA), controlled ecological life support system (CELSS), bioregenerative life support system (BLSS), note by note cuisine (NNC), circularity, and molecular pharming are some of the solutions isolated.

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Section: Anaerobic Digestion (Ad) Technologymentioning

confidence: 99%

Section: Anaerobic Digestion (Ad) Technologymentioning

confidence: 99%

Section: Anaerobic Digestion (Ad) Technologymentioning

confidence: 99%

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Dialing Back the Doomsday Clock with Circular Bioeconomy

N. Aso

2024

From Biomass to Biobased Products

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“…In terms of by-products, incineration facilities typically recycle the bottom ash to recover valuable metals, while the remaining ash can find use as construction materials, specifically aggregates [99]. In the case of anaerobic digestion, the primary by-product is digestate, a nutrient-rich material suitable for use as a fertilizer [100]. Gasification primarily results in ashes alongside the generated synthesis gas.…”

Section: Technical and Environmental Impact Of Wte Technologiesmentioning

confidence: 99%

Unlocking Energy from Waste: A Comprehensive Analysis of Municipal Solid Waste Recovery Potential in Ghana

Tahiru,

Cobbina,

Asare

et al. 2024

World

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Ghana is currently facing a waste crisis that presents considerable risks to its environment, economy, and public health. This investigation evaluates four prospective waste-to-energy options—namely, incineration, anaerobic digestion, gasification, and landfill gas—with the objective of mapping out a sustainable strategy for efficient waste management. Among these solutions, anaerobic digestion stands out as a superior option, offering renewable energy production, valuable bio-product creation, and a comparatively lower greenhouse gas emission effect. A cost analysis further reveals that utilizing biogas from anaerobic digestion is not only environmentally friendly but also economically more viable than relying on light crude oil. Producing 200 MW of energy using biogas costs 36% less, potentially resulting in monthly savings of USD 5.46 million for Ghana. However, several obstacles impede the development of WtE. Inaccurate waste data and a lack of clear policies on waste-to-energy hinder the harnessing of Ghana’s WtE potential. To address this, the study recommends (1) implementing a well-defined national strategy complete with regulations and incentives to attract investments and (2) conducting specialized research to optimize WtE technologies for Ghana’s unique waste composition and context. By surmounting these challenges, Ghana stands poised to secure a sustainable future, simultaneously meeting the targets of Sustainable Development Goals 7 and 11. This entails ensuring access to affordable, reliable, sustainable, and modern energy for all (SDG 7) and fostering inclusive, safe, resilient, and sustainable cities and human settlements (SDG 11).

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“…The C that remains is usually highly stabilized, so C retention when applied to C-poor soils is likely to be at least the 10% assumed for other residues [80], equivalent to 5.8 × 10 4 to 4.7 × 10 6 t yr −1 . The retention and availability of nutrients (N and P) in the bioslurry is high, so bioslurry also acts as an excellent organic fertilizer [98][99][100], potentially replacing the production of fertilizers using fossil fuels.…”

Section: (C) Impacts On Soils Of Producing Crops For Energymentioning

confidence: 99%

The role of soils in provision of energy

Smith

Farmer

Smith

et al. 2021

Phil. Trans. R. Soc. B

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Soils have both direct and indirect impacts on available energy, but energy provision, in itself, has direct and indirect impacts on soils. Burning peats provides only approximately 0.02% of global energy supply yet emits approximately 0.7–0.8% of carbon losses from land-use change and forestry (LUCF). Bioenergy crops provide approximately 0.3% of energy supply and occupy approximately 0.2–0.6% of harvested area. Increased bioenergy demand is likely to encourage switching from forests and pastures to rotational energy cropping, resulting in soil carbon loss. However, with protective policies, incorporation of residues from energy provision could sequester approximately 0.4% of LUCF carbon losses. All organic wastes available in 2018 could provide approximately 10% of global energy supply, but at a cost to soils of approximately 5% of LUCF carbon losses; not using manures avoids soil degradation but reduces energy provision to approximately 9%. Wind farms, hydroelectric solar and geothermal schemes provide approximately 3.66% of energy supply and occupy less than approximately 0.3% of harvested area, but if sited on peatlands could result in carbon losses that exceed reductions in fossil fuel emissions. To ensure renewable energy provision does not damage our soils, comprehensive policies and management guidelines are needed that (i) avoid peats, (ii) avoid converting permanent land uses (such as perennial grassland or forestry) to energy cropping, and (iii) return residues remaining from energy conversion processes to the soil. This article is part of the theme issue ‘The role of soils in delivering Nature's Contributions to People’.

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Digestate: The Coproduct of Biofuel Production in a Circular Economy, and New Results for Cassava Peeling Residue Digestate

Cited by 9 publications

References 75 publications

Dialing Back the Doomsday Clock with Circular Bioeconomy

Dialing Back the Doomsday Clock with Circular Bioeconomy

Unlocking Energy from Waste: A Comprehensive Analysis of Municipal Solid Waste Recovery Potential in Ghana

The role of soils in provision of energy

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