Towards the implementation of hydrothermal carbonization for nutrients, carbon, and energy recovery in centralized biogas plant treating sewage sludge

Anna Hämäläinen; Marika Kokko; Henrik Tolvanen; Viljami Kinnunen; Jukka Rintala

doi:10.1016/j.wasman.2023.11.012

Towards the implementation of hydrothermal carbonization for nutrients, carbon, and energy recovery in centralized biogas plant treating sewage sludge

Anna Hämäläinen^*
, Marika Kokko
, Henrik Tolvanen
, Viljami Kinnunen
, Jukka Rintala

^*Corresponding author for this work

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

23 Citations (Scopus)

69 Downloads (Pure)

Abstract

In recent years, extensive experimental research on hydrothermal carbonization (HTC) of sewage sludge has been performed, to study the effects of process conditions on hydrochar characteristics and nutrient, carbon, and energy recovery from sewage sludge. To promote the implementation of HTC, this study assessed HTC (230 °C, 30 min) integration into an advanced centralized biogas plant by analyzing its theoretical effects on the fates of sewage sludge solids, nitrogen, phosphorus, and carbon. The study used the mass and nutrient flows and concentrations obtained from laboratory studies, and the studied biogas plant had an original layout that employed hygienization. HTC integration decreased the solid product volume by up to 56 % and, increased the recovery of ammonium in ammonia water by 33 % and methane by 1.4 %, while increasing the biogas plant energy demand by 4 %. The changes in the nutrient and solids flows and their recovery potentials show the need to consider the rearrangements of the liquid and gas flows in the biogas plant and the re-dimensioning of stripping process.

Original language	English
Pages (from-to)	99-108
Number of pages	10
Journal	Waste Management
Volume	173
Early online date	18 Nov 2023
DOIs	https://doi.org/10.1016/j.wasman.2023.11.012
Publication status	Published - 1 Jan 2024
Publication type	A1 Journal article-refereed

Funding

The financial support of the Maj and Tor Nessling Foundation (Anna Hämäläinen), the Gasum Gas Fund (Anna Hämäläinen), and the Industrial Research Fund at Tampere University (Anna Hämäläinen) are gratefully acknowledged.

Funders
Gasum Gas Fund
Maj ja Tor Nesslingin säätiö
Tampere University

Keywords

Carbon sequestration
Energy recovery
Hydrothermal carbonization
Liquefied biogas
Nitrogen recovery
Sewage sludge digestate

Publication forum classification

Publication forum level 3

ASJC Scopus subject areas

Waste Management and Disposal

Access to Document

10.1016/j.wasman.2023.11.012Licence: CC BY

1-s2.0-S0956053X23006888-mainFinal published version, 1.77 MBLicence: CC BY

https://urn.fi/URN:NBN:fi:tuni-2023120510466Licence: CC BY

Environmental engineering
Kokko, M. (Contact) & Szlachta, M. (Contact)
Materials Science and Environmental Engineering
Facility/equipment: Research infrastructure

Cite this

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title = "Towards the implementation of hydrothermal carbonization for nutrients, carbon, and energy recovery in centralized biogas plant treating sewage sludge",

abstract = "In recent years, extensive experimental research on hydrothermal carbonization (HTC) of sewage sludge has been performed, to study the effects of process conditions on hydrochar characteristics and nutrient, carbon, and energy recovery from sewage sludge. To promote the implementation of HTC, this study assessed HTC (230 °C, 30 min) integration into an advanced centralized biogas plant by analyzing its theoretical effects on the fates of sewage sludge solids, nitrogen, phosphorus, and carbon. The study used the mass and nutrient flows and concentrations obtained from laboratory studies, and the studied biogas plant had an original layout that employed hygienization. HTC integration decreased the solid product volume by up to 56 \% and, increased the recovery of ammonium in ammonia water by 33 \% and methane by 1.4 \%, while increasing the biogas plant energy demand by 4 \%. The changes in the nutrient and solids flows and their recovery potentials show the need to consider the rearrangements of the liquid and gas flows in the biogas plant and the re-dimensioning of stripping process.",

keywords = "Carbon sequestration, Energy recovery, Hydrothermal carbonization, Liquefied biogas, Nitrogen recovery, Sewage sludge digestate",

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T1 - Towards the implementation of hydrothermal carbonization for nutrients, carbon, and energy recovery in centralized biogas plant treating sewage sludge

AU - Hämäläinen, Anna

AU - Kokko, Marika

AU - Tolvanen, Henrik

AU - Kinnunen, Viljami

AU - Rintala, Jukka

PY - 2024/1/1

Y1 - 2024/1/1

N2 - In recent years, extensive experimental research on hydrothermal carbonization (HTC) of sewage sludge has been performed, to study the effects of process conditions on hydrochar characteristics and nutrient, carbon, and energy recovery from sewage sludge. To promote the implementation of HTC, this study assessed HTC (230 °C, 30 min) integration into an advanced centralized biogas plant by analyzing its theoretical effects on the fates of sewage sludge solids, nitrogen, phosphorus, and carbon. The study used the mass and nutrient flows and concentrations obtained from laboratory studies, and the studied biogas plant had an original layout that employed hygienization. HTC integration decreased the solid product volume by up to 56 % and, increased the recovery of ammonium in ammonia water by 33 % and methane by 1.4 %, while increasing the biogas plant energy demand by 4 %. The changes in the nutrient and solids flows and their recovery potentials show the need to consider the rearrangements of the liquid and gas flows in the biogas plant and the re-dimensioning of stripping process.

AB - In recent years, extensive experimental research on hydrothermal carbonization (HTC) of sewage sludge has been performed, to study the effects of process conditions on hydrochar characteristics and nutrient, carbon, and energy recovery from sewage sludge. To promote the implementation of HTC, this study assessed HTC (230 °C, 30 min) integration into an advanced centralized biogas plant by analyzing its theoretical effects on the fates of sewage sludge solids, nitrogen, phosphorus, and carbon. The study used the mass and nutrient flows and concentrations obtained from laboratory studies, and the studied biogas plant had an original layout that employed hygienization. HTC integration decreased the solid product volume by up to 56 % and, increased the recovery of ammonium in ammonia water by 33 % and methane by 1.4 %, while increasing the biogas plant energy demand by 4 %. The changes in the nutrient and solids flows and their recovery potentials show the need to consider the rearrangements of the liquid and gas flows in the biogas plant and the re-dimensioning of stripping process.

KW - Carbon sequestration

KW - Energy recovery

KW - Hydrothermal carbonization

KW - Liquefied biogas

KW - Nitrogen recovery

KW - Sewage sludge digestate

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M3 - Article

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SN - 0956-053X

VL - 173

SP - 99

EP - 108

JO - Waste Management

JF - Waste Management

ER -

Towards the implementation of hydrothermal carbonization for nutrients, carbon, and energy recovery in centralized biogas plant treating sewage sludge

Abstract

Funding

Keywords

Publication forum classification

ASJC Scopus subject areas

Access to Document

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Equipment

Environmental engineering

Cite this