Coupling hydrothermal carbonization with anaerobic digestion: an evaluation based on energy recovery and hydrochar utilization

This work evaluates the effect of hydrothermal carbonization (HTC) as a pretreatment and post-treatment technique to anaerobic digestion (AD) of dairy sludge. HTC's effect on AD was evaluated based on energy recovery, nutrient transformation, and hydrochar utilization. The first approach was ex...

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Autores principales:	Mahmood Al Ramahi, Gábor Keszthelyi-Szabó, Sándor Beszédes
Formato:	article
Lenguaje:	EN
Publicado:	Green Wave Publishing of Canada 2021
Materias:	hydrothermal carbonization anaerobic digestion sludge biodegradability steam gasification liquid fertilizer energy balance Fuel TP315-360 Energy industries. Energy policy. Fuel trade HD9502-9502.5
Acceso en línea:	https://doaj.org/article/43c62bcaa8144f338952786034370b0d
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spelling	oai:doaj.org-article:43c62bcaa8144f338952786034370b0d2021-11-30T13:24:36ZCoupling hydrothermal carbonization with anaerobic digestion: an evaluation based on energy recovery and hydrochar utilization2292-878210.18331/BRJ2021.8.3.4https://doaj.org/article/43c62bcaa8144f338952786034370b0d2021-09-01T00:00:00Zhttps://www.biofueljournal.com/article_135741_b7bdd24788a97835ae082f3b8a2d5ba1.pdfhttps://doaj.org/toc/2292-8782This work evaluates the effect of hydrothermal carbonization (HTC) as a pretreatment and post-treatment technique to anaerobic digestion (AD) of dairy sludge. HTC's effect on AD was evaluated based on energy recovery, nutrient transformation, and hydrochar utilization. The first approach was executed by performing HTC under a range of temperatures before mesophilic AD. HTC optimal pretreatment temperature was 210 °C for 30 min residence time. HTC pretreatment significantly increased the methane yield potential by 192%, the chemical oxygen demand removal by 18%, and the sludge biodegradability during AD by 30%. On the other hand, the application of HTC after AD (post-treatment) increased the total energy production, i.e., in addition to methane, a hydrochar with a caloric value of 10.2 MJ/kg was also obtained. Moreover, HTC post-treatment improved the steam gasification performance of the AD digestate. From the fertilizer quality point of view, HTC implementation generally boosted the concentrations of macro, micro, and secondary nutrients, suggesting its suitability for use as a liquid fertilizer. Overall, the findings of the present study indicate that if bioenergy production were the main target, HTC post-treatment following AD would lead to the most promising outcomes.Mahmood Al RamahiGábor Keszthelyi-SzabóSándor BeszédesGreen Wave Publishing of Canadaarticlehydrothermal carbonizationanaerobic digestionsludge biodegradabilitysteam gasificationliquid fertilizerenergy balanceFuelTP315-360Energy industries. Energy policy. Fuel tradeHD9502-9502.5ENBiofuel Research Journal, Vol 8, Iss 3, Pp 1444-1453 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	hydrothermal carbonization anaerobic digestion sludge biodegradability steam gasification liquid fertilizer energy balance Fuel TP315-360 Energy industries. Energy policy. Fuel trade HD9502-9502.5
spellingShingle	hydrothermal carbonization anaerobic digestion sludge biodegradability steam gasification liquid fertilizer energy balance Fuel TP315-360 Energy industries. Energy policy. Fuel trade HD9502-9502.5 Mahmood Al Ramahi Gábor Keszthelyi-Szabó Sándor Beszédes Coupling hydrothermal carbonization with anaerobic digestion: an evaluation based on energy recovery and hydrochar utilization
description	This work evaluates the effect of hydrothermal carbonization (HTC) as a pretreatment and post-treatment technique to anaerobic digestion (AD) of dairy sludge. HTC's effect on AD was evaluated based on energy recovery, nutrient transformation, and hydrochar utilization. The first approach was executed by performing HTC under a range of temperatures before mesophilic AD. HTC optimal pretreatment temperature was 210 °C for 30 min residence time. HTC pretreatment significantly increased the methane yield potential by 192%, the chemical oxygen demand removal by 18%, and the sludge biodegradability during AD by 30%. On the other hand, the application of HTC after AD (post-treatment) increased the total energy production, i.e., in addition to methane, a hydrochar with a caloric value of 10.2 MJ/kg was also obtained. Moreover, HTC post-treatment improved the steam gasification performance of the AD digestate. From the fertilizer quality point of view, HTC implementation generally boosted the concentrations of macro, micro, and secondary nutrients, suggesting its suitability for use as a liquid fertilizer. Overall, the findings of the present study indicate that if bioenergy production were the main target, HTC post-treatment following AD would lead to the most promising outcomes.
format	article
author	Mahmood Al Ramahi Gábor Keszthelyi-Szabó Sándor Beszédes
author_facet	Mahmood Al Ramahi Gábor Keszthelyi-Szabó Sándor Beszédes
author_sort	Mahmood Al Ramahi
title	Coupling hydrothermal carbonization with anaerobic digestion: an evaluation based on energy recovery and hydrochar utilization
title_short	Coupling hydrothermal carbonization with anaerobic digestion: an evaluation based on energy recovery and hydrochar utilization
title_full	Coupling hydrothermal carbonization with anaerobic digestion: an evaluation based on energy recovery and hydrochar utilization
title_fullStr	Coupling hydrothermal carbonization with anaerobic digestion: an evaluation based on energy recovery and hydrochar utilization
title_full_unstemmed	Coupling hydrothermal carbonization with anaerobic digestion: an evaluation based on energy recovery and hydrochar utilization
title_sort	coupling hydrothermal carbonization with anaerobic digestion: an evaluation based on energy recovery and hydrochar utilization
publisher	Green Wave Publishing of Canada
publishDate	2021
url	https://doaj.org/article/43c62bcaa8144f338952786034370b0d
work_keys_str_mv	AT mahmoodalramahi couplinghydrothermalcarbonizationwithanaerobicdigestionanevaluationbasedonenergyrecoveryandhydrocharutilization AT gaborkeszthelyiszabo couplinghydrothermalcarbonizationwithanaerobicdigestionanevaluationbasedonenergyrecoveryandhydrocharutilization AT sandorbeszedes couplinghydrothermalcarbonizationwithanaerobicdigestionanevaluationbasedonenergyrecoveryandhydrocharutilization
_version_	1718406557247471616

Coupling hydrothermal carbonization with anaerobic digestion: an evaluation based on energy recovery and hydrochar utilization

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