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- W1277148906 abstract "This study presents a novel process for producing pipeline-quality biomethane by anaerobic digestion (AD) of sludge with in-situ biogas cleanup and upgrading using corn stover biochar. The biochar has high surface area (105 m2/g), high ash content (45.2% dry weight) and high concentrations of potassium, calcium and magnesium (14.2% K2O, 3.9% CaO and 4.2% MgO of the ash content, respectively). The biochar-amended digesters produced near pipeline-quality biomethane (>90% CH4 and <5 ppb H2S), facilitated CO2 removal by up to 86.3%, boosted average CH4 content in biogas by up to 42.4% compared to the control digester, close to fungibility of natural gas. The biochar addition enhanced the methane yield, biomethanation rate constant and maximum methane production rate by up to 7.0%, 8.1% and 27.6%, respectively. The biochar addition also increased alkalinity and mitigated ammonia inhibition, providing sustainable process stability for thermophilic sludge AD. The biochar-amended digestate is enriched with nutrients such as potassium, nitrogen and phosphorus, and therefore has great potential for soil applications." @default.
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- W1277148906 date "2015-11-01" @default.
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- W1277148906 title "Producing pipeline-quality biomethane via anaerobic digestion of sludge amended with corn stover biochar with in-situ CO2 removal" @default.
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- W1277148906 doi "https://doi.org/10.1016/j.apenergy.2015.08.016" @default.
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