Process simulation of co-HTC of sewage sludge and food waste digestates and supercritical water gasification of aqueous effluent integrated with biogas plants

Niloufar Ghavami; Karhan Özdenkci; Cataldo De Blasio

doi:10.1016/j.energy.2023.130221

Process simulation of co-HTC of sewage sludge and food waste digestates and supercritical water gasification of aqueous effluent integrated with biogas plants

Energiteknik

Forskningsoutput: Tidskriftsbidrag › Artikel › Vetenskaplig › Peer review

19 Citeringar (Scopus)

139 Nedladdningar (Pure)

Sammanfattning

The objective of this article is to investigate the integration of a digestate treatment with a biogas plant processing sewage sludge and food waste via process simulations: co-HTC of mixed digestates and supercritical water gasification (SCWG) of the aqueous effluent. The optimum co-HTC conditions are selected based on the energetic yields, comparing relative equipment sizes besides the hydrochar product. The selected conditions are 200 °C, 30 % solid load, and 1-h residence time for the mixing ratios in scope: energetic yields of 3.58–3.59 MJ/kg reactor inlet. These conditions result in more than 60 % K, P, and N recovery on hydrochar. SCWG of the aqueous effluent provides complete mineral recovery in the solid form and surplus energy production through syngas while causing some nitrogen loss as N ₂ gas. Although the co-HTC data is calculated from individual HTC results, the synergetic effect on the energetic yield does not affect the selection of optimum conditions as investigated through co-HTC of sewage sludge and food waste (the origins of the digestates). Consequently, biogas plants can evolve into multi-product biorefineries through the proposed integration. Meanwhile, this study can guide future co-HTC experiments of food waste and sewage sludge digestates and reduce the required runs.

Originalspråk	Engelska
Artikelnummer	130221
Tidskrift	Energy
Volym	291
DOI	https://doi.org/10.1016/j.energy.2023.130221
Status	Publicerad - 15 mars 2024
MoE-publikationstyp	A1 Tidskriftsartikel-refererad

Finansiering

We gratefully acknowledge the financial support of Kaute Foundation [20220122] and the University Foundation of Ostrobothnia (Högskolestiftelsen) [28600148] in Finland. We are also very grateful to the EU Regional Council of Ostrobothnia for their support in conducting the EU-ERUF project named “Implementation of a hydrothermal carbonization process for the disposal sludge and wet organic streams” [28400198K1]. We gratefully acknowledge the financial support of Kaute Foundation [ 20220122 ] and the University Foundation of Ostrobothnia (Högskolestiftelsen) [ 28600148 ] in Finland. We are also very grateful to the EU Regional Council of Ostrobothnia for their support in conducting the EU-ERUF project named “ Implementation of a hydrothermal carbonization process for the disposal sludge and wet organic streams ” [ 28400198K1 ].

Åtkomst av dokument

10.1016/j.energy.2023.130221Licens: CC BY

1-s2.0-S0360544223036150-mainSlutlig publicerad version, 2,55 MBLicens: CC BY

https://urn.fi/URN:NBN:fi-fe2024040113796

Citera det här

@article{93b06c04603b48dbb05ba68b0e6ee395,

title = "Process simulation of co-HTC of sewage sludge and food waste digestates and supercritical water gasification of aqueous effluent integrated with biogas plants",

abstract = "The objective of this article is to investigate the integration of a digestate treatment with a biogas plant processing sewage sludge and food waste via process simulations: co-HTC of mixed digestates and supercritical water gasification (SCWG) of the aqueous effluent. The optimum co-HTC conditions are selected based on the energetic yields, comparing relative equipment sizes besides the hydrochar product. The selected conditions are 200 °C, 30 \% solid load, and 1-h residence time for the mixing ratios in scope: energetic yields of 3.58{\textendash}3.59 MJ/kg reactor inlet. These conditions result in more than 60 \% K, P, and N recovery on hydrochar. SCWG of the aqueous effluent provides complete mineral recovery in the solid form and surplus energy production through syngas while causing some nitrogen loss as N 2 gas. Although the co-HTC data is calculated from individual HTC results, the synergetic effect on the energetic yield does not affect the selection of optimum conditions as investigated through co-HTC of sewage sludge and food waste (the origins of the digestates). Consequently, biogas plants can evolve into multi-product biorefineries through the proposed integration. Meanwhile, this study can guide future co-HTC experiments of food waste and sewage sludge digestates and reduce the required runs.",

author = "Niloufar Ghavami and Karhan {\"O}zdenkci and \{De Blasio\}, Cataldo",

year = "2024",

month = mar,

day = "15",

doi = "10.1016/j.energy.2023.130221",

language = "English",

volume = "291",

journal = "Energy",

issn = "0360-5442",

publisher = "Elsevier",

}

TY - JOUR

T1 - Process simulation of co-HTC of sewage sludge and food waste digestates and supercritical water gasification of aqueous effluent integrated with biogas plants

AU - Ghavami, Niloufar

AU - Özdenkci, Karhan

AU - De Blasio, Cataldo

PY - 2024/3/15

Y1 - 2024/3/15

N2 - The objective of this article is to investigate the integration of a digestate treatment with a biogas plant processing sewage sludge and food waste via process simulations: co-HTC of mixed digestates and supercritical water gasification (SCWG) of the aqueous effluent. The optimum co-HTC conditions are selected based on the energetic yields, comparing relative equipment sizes besides the hydrochar product. The selected conditions are 200 °C, 30 % solid load, and 1-h residence time for the mixing ratios in scope: energetic yields of 3.58–3.59 MJ/kg reactor inlet. These conditions result in more than 60 % K, P, and N recovery on hydrochar. SCWG of the aqueous effluent provides complete mineral recovery in the solid form and surplus energy production through syngas while causing some nitrogen loss as N 2 gas. Although the co-HTC data is calculated from individual HTC results, the synergetic effect on the energetic yield does not affect the selection of optimum conditions as investigated through co-HTC of sewage sludge and food waste (the origins of the digestates). Consequently, biogas plants can evolve into multi-product biorefineries through the proposed integration. Meanwhile, this study can guide future co-HTC experiments of food waste and sewage sludge digestates and reduce the required runs.

AB - The objective of this article is to investigate the integration of a digestate treatment with a biogas plant processing sewage sludge and food waste via process simulations: co-HTC of mixed digestates and supercritical water gasification (SCWG) of the aqueous effluent. The optimum co-HTC conditions are selected based on the energetic yields, comparing relative equipment sizes besides the hydrochar product. The selected conditions are 200 °C, 30 % solid load, and 1-h residence time for the mixing ratios in scope: energetic yields of 3.58–3.59 MJ/kg reactor inlet. These conditions result in more than 60 % K, P, and N recovery on hydrochar. SCWG of the aqueous effluent provides complete mineral recovery in the solid form and surplus energy production through syngas while causing some nitrogen loss as N 2 gas. Although the co-HTC data is calculated from individual HTC results, the synergetic effect on the energetic yield does not affect the selection of optimum conditions as investigated through co-HTC of sewage sludge and food waste (the origins of the digestates). Consequently, biogas plants can evolve into multi-product biorefineries through the proposed integration. Meanwhile, this study can guide future co-HTC experiments of food waste and sewage sludge digestates and reduce the required runs.

U2 - 10.1016/j.energy.2023.130221

DO - 10.1016/j.energy.2023.130221

M3 - Article

SN - 0360-5442

VL - 291

JO - Energy

JF - Energy

M1 - 130221

ER -

Process simulation of co-HTC of sewage sludge and food waste digestates and supercritical water gasification of aqueous effluent integrated with biogas plants

Sammanfattning

Finansiering

Åtkomst av dokument

Fingeravtryck

Citera det här