Ex-situ biological hydrogen methanation in trickle bed reactors: Integration into biogas production facilities

Donya Kamravamanesh; Johanna M. Rinta Kanto; Harri Ali-Loytty; Antti Myllärinen; Mikko Saalasti; Jukka Rintala; Marika Kokko

doi:10.1016/j.ces.2023.118498

Ex-situ biological hydrogen methanation in trickle bed reactors: Integration into biogas production facilities

Donya Kamravamanesh, Johanna M. Rinta Kanto, Harri Ali-Loytty, Antti Myllärinen, Mikko Saalasti, Jukka Rintala, Marika Kokko

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

Biological hydrogen methanation (BHM) is a biocatalytic process for biogas upgrading. Integrating ex-situ BHM processes into biogas facilities has the advantage of using inoculum, CO₂, and nutrients directly from anaerobic digestion (AD) processes to enhance CH₄ productivity. This study investigated the potential of biowaste digestate as an inoculum and digested biowaste reject water as the trickling liquid and nutrient source in thermophilic trickle bed reactors (TBRs). Use of reject water improved H₂ conversion efficiency to up to 99 %, thus achieving a H₂ loading rate of 10.8 L_H2 L _Rv^-1 d^-1 at a gas retention time (GRT) of 1.8 h and CH₄ productivity of 2.6 L L_Rv^-1 d^-1 implying that reject water contains macronutrients beneficial to enriching hydrogenotrophic methanogens. However, at high H₂ loading rates, a trace element supply was necessary to stabilize process performance. Hydrogenotrophic methanogens Methanothermobacter and Methanobacterium were selectively enriched, mainly due to the increased H₂ loading rate.

Original language	English
Article number	118498
Journal	Chemical Engineering Science
Volume	269
Early online date	20 Jan 2023
DOIs	https://doi.org/10.1016/j.ces.2023.118498
Publication status	Published - 5 Apr 2023
Publication type	A1 Journal article-refereed

Keywords

Biological hydrogen methanation
Digested biowaste reject water
Hydrogenotrophic methanogens
Power-to-gas
Trickle bed reactor

Publication forum classification

Publication forum level 3

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.ces.2023.118498Licence: CC BY

1-s2.0-S0009250923000544-mainFinal published version, 1.78 MBLicence: CC BY

https://urn.fi/URN:NBN:fi:tuni-202303243142Licence: CC BY

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title = "Ex-situ biological hydrogen methanation in trickle bed reactors: Integration into biogas production facilities",

abstract = "Biological hydrogen methanation (BHM) is a biocatalytic process for biogas upgrading. Integrating ex-situ BHM processes into biogas facilities has the advantage of using inoculum, CO2, and nutrients directly from anaerobic digestion (AD) processes to enhance CH4 productivity. This study investigated the potential of biowaste digestate as an inoculum and digested biowaste reject water as the trickling liquid and nutrient source in thermophilic trickle bed reactors (TBRs). Use of reject water improved H2 conversion efficiency to up to 99 %, thus achieving a H2 loading rate of 10.8 LH2 L Rv-1 d-1 at a gas retention time (GRT) of 1.8 h and CH4 productivity of 2.6 L LRv-1 d-1 implying that reject water contains macronutrients beneficial to enriching hydrogenotrophic methanogens. However, at high H2 loading rates, a trace element supply was necessary to stabilize process performance. Hydrogenotrophic methanogens Methanothermobacter and Methanobacterium were selectively enriched, mainly due to the increased H2 loading rate.",

keywords = "Biological hydrogen methanation, Digested biowaste reject water, Hydrogenotrophic methanogens, Power-to-gas, Trickle bed reactor",

author = "Donya Kamravamanesh and {Rinta Kanto}, {Johanna M.} and Harri Ali-Loytty and Antti Myll{\"a}rinen and Mikko Saalasti and Jukka Rintala and Marika Kokko",

note = "Funding Information: The financial support of Doranova Ltd. is gratefully acknowledged. Antti Nuottaj{\"a}rvi and Mika Karttunen are also acknowledged for their support in the laboratory. Publisher Copyright: {\textcopyright} 2023 The Author(s)",

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doi = "10.1016/j.ces.2023.118498",

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TY - JOUR

T1 - Ex-situ biological hydrogen methanation in trickle bed reactors

T2 - Integration into biogas production facilities

AU - Kamravamanesh, Donya

AU - Rinta Kanto, Johanna M.

AU - Ali-Loytty, Harri

AU - Myllärinen, Antti

AU - Saalasti, Mikko

AU - Rintala, Jukka

AU - Kokko, Marika

N1 - Funding Information: The financial support of Doranova Ltd. is gratefully acknowledged. Antti Nuottajärvi and Mika Karttunen are also acknowledged for their support in the laboratory. Publisher Copyright: © 2023 The Author(s)

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Y1 - 2023/4/5

N2 - Biological hydrogen methanation (BHM) is a biocatalytic process for biogas upgrading. Integrating ex-situ BHM processes into biogas facilities has the advantage of using inoculum, CO2, and nutrients directly from anaerobic digestion (AD) processes to enhance CH4 productivity. This study investigated the potential of biowaste digestate as an inoculum and digested biowaste reject water as the trickling liquid and nutrient source in thermophilic trickle bed reactors (TBRs). Use of reject water improved H2 conversion efficiency to up to 99 %, thus achieving a H2 loading rate of 10.8 LH2 L Rv-1 d-1 at a gas retention time (GRT) of 1.8 h and CH4 productivity of 2.6 L LRv-1 d-1 implying that reject water contains macronutrients beneficial to enriching hydrogenotrophic methanogens. However, at high H2 loading rates, a trace element supply was necessary to stabilize process performance. Hydrogenotrophic methanogens Methanothermobacter and Methanobacterium were selectively enriched, mainly due to the increased H2 loading rate.

AB - Biological hydrogen methanation (BHM) is a biocatalytic process for biogas upgrading. Integrating ex-situ BHM processes into biogas facilities has the advantage of using inoculum, CO2, and nutrients directly from anaerobic digestion (AD) processes to enhance CH4 productivity. This study investigated the potential of biowaste digestate as an inoculum and digested biowaste reject water as the trickling liquid and nutrient source in thermophilic trickle bed reactors (TBRs). Use of reject water improved H2 conversion efficiency to up to 99 %, thus achieving a H2 loading rate of 10.8 LH2 L Rv-1 d-1 at a gas retention time (GRT) of 1.8 h and CH4 productivity of 2.6 L LRv-1 d-1 implying that reject water contains macronutrients beneficial to enriching hydrogenotrophic methanogens. However, at high H2 loading rates, a trace element supply was necessary to stabilize process performance. Hydrogenotrophic methanogens Methanothermobacter and Methanobacterium were selectively enriched, mainly due to the increased H2 loading rate.

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KW - Digested biowaste reject water

KW - Hydrogenotrophic methanogens

KW - Power-to-gas

KW - Trickle bed reactor

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DO - 10.1016/j.ces.2023.118498

M3 - Article

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JO - Chemical Engineering Science

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ER -

Ex-situ biological hydrogen methanation in trickle bed reactors: Integration into biogas production facilities

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