Supercritical water gasification of sewage sludge: gas production and phosphorus recovery

N.Y. Acelas Soto; D.P. Lopez; Derk Willem Frederik Brilman; Sascha R.A. Kersten; A.M.J. Kootstra

doi:10.1016/j.biortech.2014.10.003

Supercritical water gasification of sewage sludge: gas production and phosphorus recovery

N.Y. Acelas Soto, D.P. Lopez, Derk Willem Frederik Brilman, Sascha R.A. Kersten, A.M.J. Kootstra

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Abstract

In this study, the feasibility of the gasification of dewatered sewage sludge in supercritical water (SCW) for energy recovery combined with P-recovery from the solid residue generated in this process was investigated. SCWG temperature (400 °C, 500 °C, 600 °C) and residence time (15 min, 30 min, 60 min) were varied to investigate their effects on gas production and the P recovery by acid leaching. The results show that the dry gas composition for this uncatalyzed gasification of sewage sludge in SCW mainly comprised of CO2, CO, CH4, H2, and some C2–C3 compounds. Higher temperatures and longer residence times favored the production of H2 and CH4. After SCWG, more than 95% of the P could be recovered from the solid residue by leaching with acids. SCWG combined with acid leaching seems an effective method for both energy recovery and high P recovery from sewage sludge.

Original language	English
Pages (from-to)	167-175
Number of pages	9
Journal	Bioresource technology
Volume	174
DOIs	https://doi.org/10.1016/j.biortech.2014.10.003
Publication status	Published - 2014

Keywords

METIS-307761
IR-95032

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10.1016/j.biortech.2014.10.003

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@article{38a63d67b78249a9a1758c4f5ec86723,

title = "Supercritical water gasification of sewage sludge: gas production and phosphorus recovery",

abstract = "In this study, the feasibility of the gasification of dewatered sewage sludge in supercritical water (SCW) for energy recovery combined with P-recovery from the solid residue generated in this process was investigated. SCWG temperature (400 °C, 500 °C, 600 °C) and residence time (15 min, 30 min, 60 min) were varied to investigate their effects on gas production and the P recovery by acid leaching. The results show that the dry gas composition for this uncatalyzed gasification of sewage sludge in SCW mainly comprised of CO2, CO, CH4, H2, and some C2–C3 compounds. Higher temperatures and longer residence times favored the production of H2 and CH4. After SCWG, more than 95% of the P could be recovered from the solid residue by leaching with acids. SCWG combined with acid leaching seems an effective method for both energy recovery and high P recovery from sewage sludge.",

keywords = "METIS-307761, IR-95032",

author = "{Acelas Soto}, N.Y. and D.P. Lopez and Brilman, {Derk Willem Frederik} and Kersten, {Sascha R.A.} and A.M.J. Kootstra",

year = "2014",

doi = "10.1016/j.biortech.2014.10.003",

language = "English",

volume = "174",

pages = "167--175",

journal = "Bioresource technology",

issn = "0960-8524",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Supercritical water gasification of sewage sludge: gas production and phosphorus recovery

AU - Acelas Soto, N.Y.

AU - Lopez, D.P.

AU - Brilman, Derk Willem Frederik

AU - Kersten, Sascha R.A.

AU - Kootstra, A.M.J.

PY - 2014

Y1 - 2014

N2 - In this study, the feasibility of the gasification of dewatered sewage sludge in supercritical water (SCW) for energy recovery combined with P-recovery from the solid residue generated in this process was investigated. SCWG temperature (400 °C, 500 °C, 600 °C) and residence time (15 min, 30 min, 60 min) were varied to investigate their effects on gas production and the P recovery by acid leaching. The results show that the dry gas composition for this uncatalyzed gasification of sewage sludge in SCW mainly comprised of CO2, CO, CH4, H2, and some C2–C3 compounds. Higher temperatures and longer residence times favored the production of H2 and CH4. After SCWG, more than 95% of the P could be recovered from the solid residue by leaching with acids. SCWG combined with acid leaching seems an effective method for both energy recovery and high P recovery from sewage sludge.

AB - In this study, the feasibility of the gasification of dewatered sewage sludge in supercritical water (SCW) for energy recovery combined with P-recovery from the solid residue generated in this process was investigated. SCWG temperature (400 °C, 500 °C, 600 °C) and residence time (15 min, 30 min, 60 min) were varied to investigate their effects on gas production and the P recovery by acid leaching. The results show that the dry gas composition for this uncatalyzed gasification of sewage sludge in SCW mainly comprised of CO2, CO, CH4, H2, and some C2–C3 compounds. Higher temperatures and longer residence times favored the production of H2 and CH4. After SCWG, more than 95% of the P could be recovered from the solid residue by leaching with acids. SCWG combined with acid leaching seems an effective method for both energy recovery and high P recovery from sewage sludge.

KW - METIS-307761

KW - IR-95032

U2 - 10.1016/j.biortech.2014.10.003

DO - 10.1016/j.biortech.2014.10.003

M3 - Article

SN - 0960-8524

VL - 174

SP - 167

EP - 175

JO - Bioresource technology

JF - Bioresource technology

ER -

Supercritical water gasification of sewage sludge: gas production and phosphorus recovery

Abstract

Keywords

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