Biochar Produced from Organic Waste Digestate and Its Potential Utilization for Soil Remediation: An Overview

Wongrod, Suchanya; Guibaud, Gilles; Simon, Stéphane; Lens, P.N.L.; Huguenot, David; Péchaud, Yoan; Hullebusch, Eric D. van

doi:10.1007/978-3-030-87633-3_10

Cited by 1 publication

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“…Biochars and hydrochars are discussed in this section for their potential applications in four major areas: carbon sink for long-term stability, carbon sequestration, biogas production or upgrading, and pathway integration with anaerobic digestion processes (recycling pathway). The stability mechanisms underlying biochar production are discussed in detail, Table 13 Operational conditions and different yields from thermal conversion methods (Sakhiya et al 2020;Zhang et al 2019;Kambo and Dutta 2015;Belcher 2013;Sohi et al 2010;Wongrod et al 2022;Kung et al 2022) Numerous thermochemical processes can be used to treat biomass and generate various products and byproducts. Fast pyrolysis produces biochar, gas, and oil with % yields of 12, 13, and 75%, respectively, while slow pyrolysis produces 35, 35, and 30%, respectively.…”

Section: Digestate-driven Biocharmentioning

confidence: 99%

“…Drying the digestate (65-80 °C) prior to pyrolysis or gasification is required to reduce the moisture content of the digestate to less than 10% (Wongrod et al 2022). Before pyrolysis, the biomass/digestate is dried, and gasification is an energy-intensive process, which is considered an Numerous thermochemical methods for producing biochar are discussed, including pyrolysis, hydrothermal carbonisation, and gasification.…”

Section: Biochar and Hydrochar Production Technologiesmentioning

confidence: 99%

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Integration of biogas systems into a carbon zero and hydrogen economy: a review

et al. 2022

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The Ukraine conflict has put critical pressure on gas supplies and increased the price of fertilisers. As a consequence, biogas has gained remarkable attention as a local source of both gas for energy and biofertiliser for agriculture. Moreover, climate change-related damage incentivises all sectors to decarbonise and integrate sustainable practices. For instance, anaerobic digestion allows decarbonisation and optimal waste management. Incorporating a biogas system in each country would limit global warming to 2 °C. If suitable policies mechanisms are implemented, the biogas industry could reduce global greenhouse gas emissions by 3.29–4.36 gigatonnes carbon dioxide equivalent, which represent about 10–13% of global emissions. Here, we review the role of the biogas sector in capturing methane and mitigating carbon emissions associated with biogas outputs. Since biogas impurities can cause severe practical difficulties in biogas storing and gas grid delivering systems, we present upgrading technologies that remove or consume the carbon dioxide in raw biogas, to achieve a minimum of 95% methane content. We discuss the role of hydrogen-assisted biological biogas upgrading in carbon sequestration by converting carbon dioxide to biomethane via utilising hydrogen generated primarily through other renewable energy sources such as water electrolysis and photovoltaic solar facilities or wind turbines. This conceptual shift of 'power to gas' allows storing and utilising the excess of energy generated in grids. By converting carbon dioxide produced during anaerobic digestion into additional biomethane, biogas has the potential to meet 53% of the demand for fossil natural gas. We also evaluate the role of digestate from biogas systems in producing biochar, which can be used directly as a biofertiliser or indirectly as a biomethanation enhancement, upgrading, and cleaning material.

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