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The Influence of Low-Temperature Food Waste Biochars on Anaerobic Digestion of Food Waste

The proof-of-the-concept of application of low-temperature food waste biochars for the anaerobic digestion (AD) of food waste (the same substrate) was tested. The concept assumes that residual heat from biogas utilization may be reused for biochar production. Four low-temperature biochars produced u...

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Autores principales: Świechowski, Kacper, Matyjewicz, Bartosz, Telega, Paweł, Białowiec, Andrzej
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8838194/
https://www.ncbi.nlm.nih.gov/pubmed/35160890
http://dx.doi.org/10.3390/ma15030945
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author Świechowski, Kacper
Matyjewicz, Bartosz
Telega, Paweł
Białowiec, Andrzej
author_facet Świechowski, Kacper
Matyjewicz, Bartosz
Telega, Paweł
Białowiec, Andrzej
author_sort Świechowski, Kacper
collection PubMed
description The proof-of-the-concept of application of low-temperature food waste biochars for the anaerobic digestion (AD) of food waste (the same substrate) was tested. The concept assumes that residual heat from biogas utilization may be reused for biochar production. Four low-temperature biochars produced under two pyrolytic temperatures 300 °C and 400 °C and under atmospheric and 15 bars pressure with 60 min retention time were used. Additionally, the biochar produced during hydrothermal carbonization (HTC) was tested. The work studied the effect of a low biochar dose (0.05 g(BC) × g(TSsubstrate)(−1), or 0.65 g(BC) × L(−1)) on AD batch reactors’ performance. The biochemical methane potential test took 21 days, and the process kinetics using the first-order model were determined. The results showed that biochars obtained under 400 °C with atmospheric pressure and under HTC conditions improve methane yield by 3.6%. It has been revealed that thermochemical pressure influences the electrical conductivity of biochars. The biomethane was produced with a rate (k) of 0.24 d(−1), and the most effective biochars increased the biodegradability of food waste (FW) to 81% compared to variants without biochars (75%).
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spelling pubmed-88381942022-02-13 The Influence of Low-Temperature Food Waste Biochars on Anaerobic Digestion of Food Waste Świechowski, Kacper Matyjewicz, Bartosz Telega, Paweł Białowiec, Andrzej Materials (Basel) Article The proof-of-the-concept of application of low-temperature food waste biochars for the anaerobic digestion (AD) of food waste (the same substrate) was tested. The concept assumes that residual heat from biogas utilization may be reused for biochar production. Four low-temperature biochars produced under two pyrolytic temperatures 300 °C and 400 °C and under atmospheric and 15 bars pressure with 60 min retention time were used. Additionally, the biochar produced during hydrothermal carbonization (HTC) was tested. The work studied the effect of a low biochar dose (0.05 g(BC) × g(TSsubstrate)(−1), or 0.65 g(BC) × L(−1)) on AD batch reactors’ performance. The biochemical methane potential test took 21 days, and the process kinetics using the first-order model were determined. The results showed that biochars obtained under 400 °C with atmospheric pressure and under HTC conditions improve methane yield by 3.6%. It has been revealed that thermochemical pressure influences the electrical conductivity of biochars. The biomethane was produced with a rate (k) of 0.24 d(−1), and the most effective biochars increased the biodegradability of food waste (FW) to 81% compared to variants without biochars (75%). MDPI 2022-01-26 /pmc/articles/PMC8838194/ /pubmed/35160890 http://dx.doi.org/10.3390/ma15030945 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Świechowski, Kacper
Matyjewicz, Bartosz
Telega, Paweł
Białowiec, Andrzej
The Influence of Low-Temperature Food Waste Biochars on Anaerobic Digestion of Food Waste
title The Influence of Low-Temperature Food Waste Biochars on Anaerobic Digestion of Food Waste
title_full The Influence of Low-Temperature Food Waste Biochars on Anaerobic Digestion of Food Waste
title_fullStr The Influence of Low-Temperature Food Waste Biochars on Anaerobic Digestion of Food Waste
title_full_unstemmed The Influence of Low-Temperature Food Waste Biochars on Anaerobic Digestion of Food Waste
title_short The Influence of Low-Temperature Food Waste Biochars on Anaerobic Digestion of Food Waste
title_sort influence of low-temperature food waste biochars on anaerobic digestion of food waste
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8838194/
https://www.ncbi.nlm.nih.gov/pubmed/35160890
http://dx.doi.org/10.3390/ma15030945
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