Synergies during hydrothermal liquefaction of cow manure and wheat straw

Juliano Souza Dos Passos; Aisha Matayeva; Patrick Biller

doi:10.1016/j.jece.2022.108181

Synergies during hydrothermal liquefaction of cow manure and wheat straw

Juliano Souza Dos Passos, Aisha Matayeva, Patrick Biller^*

^*Corresponding author for this work

Department of Biological and Chemical Engineering - Process and Materials Engineering
CBIO - Centre for Circular Bioeconomy, Foulum - CBIO - Centre for Circular Bioeconomy, Roskilde

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

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Abstract

Agribusiness crop and animal residues constitute some of the major waste streams worldwide. Among them, wheat straw and cow manure are large contributors to the quantities generated. Both materials can be converted using hydrothermal liquefaction (HTL) for recovery of biocrude and here we investigate how combined HTL processing can be of great interest to boost biocrude production and carbon recovery. This study presents batch HTL experiments using individual and blended feedstock mixtures to build predictive models for biocrude, carbon and energy recovery. These models are validated using a continuous HTL pilot plant. The combined approach led to the nitrogen-containing compounds present in cow manure to react with lignocellulosic-derived compounds from wheat straw and divert carbon into the oil phase, the reason for which biocrude, carbon and energy yields were drastically improved. Continuous HTL pilot plant campaigns successfully demonstrated increased carbon yields from 40% to 60% when using optimal feedstock ratios. Continuous data also shows the great benefits of increasing the organic matter concentration input with combined processing, resulting in total energy efficiencies larger than 50% and energy return over investment of 2.6, compared to 1.3-1.9 for individual feedstock processing.

Original language	English
Article number	108181
Journal	Journal of Environmental Chemical Engineering
Volume	10
Issue	5
Number of pages	10
ISSN	2213-3437
DOIs	https://doi.org/10.1016/j.jece.2022.108181
Publication status	Published - Oct 2022

Keywords

Biofuel
Hydrothermal liquefaction
Manure
Waste valorization
Wheat straw

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10.1016/j.jece.2022.108181Licence: CC BY

1-s2.0-S2213343722010545-mainFinal published version, 2.26 MBLicence: CC BY

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Synergies during hydrothermal liquefaction of cow manure and wheat straw. / Dos Passos, Juliano Souza; Matayeva, Aisha; Biller, Patrick.
In: Journal of Environmental Chemical Engineering, Vol. 10, No. 5, 108181, 10.2022.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

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AU - Biller, Patrick

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AB - Agribusiness crop and animal residues constitute some of the major waste streams worldwide. Among them, wheat straw and cow manure are large contributors to the quantities generated. Both materials can be converted using hydrothermal liquefaction (HTL) for recovery of biocrude and here we investigate how combined HTL processing can be of great interest to boost biocrude production and carbon recovery. This study presents batch HTL experiments using individual and blended feedstock mixtures to build predictive models for biocrude, carbon and energy recovery. These models are validated using a continuous HTL pilot plant. The combined approach led to the nitrogen-containing compounds present in cow manure to react with lignocellulosic-derived compounds from wheat straw and divert carbon into the oil phase, the reason for which biocrude, carbon and energy yields were drastically improved. Continuous HTL pilot plant campaigns successfully demonstrated increased carbon yields from 40% to 60% when using optimal feedstock ratios. Continuous data also shows the great benefits of increasing the organic matter concentration input with combined processing, resulting in total energy efficiencies larger than 50% and energy return over investment of 2.6, compared to 1.3-1.9 for individual feedstock processing.

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Synergies during hydrothermal liquefaction of cow manure and wheat straw

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