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Title: Bench-Scale Evaluation of Hydrothermal Processing Technology for Conversion of Wastewater Solids to Fuels

Abstract

Hydrothermal Liquefaction (HTL) and Catalytic Hydrothermal Gasification (CHG) proof-of-concept bench-scale tests were performed to assess the potential of hydrothermal treatment for handling municipal wastewater sludge. HTL tests were conducted at 300-350°C and 20 MPa on three different feeds: primary sludge, secondary sludge, and digested solids. Corresponding CHG tests were conducted at 350°C and 20 MPa on the HTL aqueous phase output using a ruthenium based catalyst. Biocrude yields ranged from 25-37%. Biocrude composition and quality were comparable to biocrudes generated from algae feeds. Subsequent hydrotreating of biocrude resulted in a product with comparable physical and chemical properties to crude oil. CHG product gas methane yields on a carbon basis ranged from 47-64%. Siloxane concentrations in the CHG product gas were below engine limits. The HTL-CHG process resulted in a chemical oxygen demand (COD) reduction of > 99.9% and a reduction in residual solids for disposal of 94-99%.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1434855
Report Number(s):
PNNL-SA-131515
Journal ID: ISSN 1061-4303; WAERED; BM0102060
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Water Environment Research
Additional Journal Information:
Journal Volume: 90; Journal Issue: 4; Journal ID: ISSN 1061-4303
Country of Publication:
United States
Language:
English
Subject:
hydrothermal; liquefaction; biocrude; catalyst; gasification; hydrotreating; upgrading; wastewater solids; sludge

Citation Formats

Marrone, Philip A., Elliott, Douglas C., Billing, Justin M., Hallen, Richard T., Hart, Todd R., Kadota, Paul, Moeller, Jeff C., Randel, Margaaret A., and Schmidt, Andrew J. Bench-Scale Evaluation of Hydrothermal Processing Technology for Conversion of Wastewater Solids to Fuels. United States: N. p., 2018. Web.
Marrone, Philip A., Elliott, Douglas C., Billing, Justin M., Hallen, Richard T., Hart, Todd R., Kadota, Paul, Moeller, Jeff C., Randel, Margaaret A., & Schmidt, Andrew J. Bench-Scale Evaluation of Hydrothermal Processing Technology for Conversion of Wastewater Solids to Fuels. United States.
Marrone, Philip A., Elliott, Douglas C., Billing, Justin M., Hallen, Richard T., Hart, Todd R., Kadota, Paul, Moeller, Jeff C., Randel, Margaaret A., and Schmidt, Andrew J. Sun . "Bench-Scale Evaluation of Hydrothermal Processing Technology for Conversion of Wastewater Solids to Fuels". United States.
@article{osti_1434855,
title = {Bench-Scale Evaluation of Hydrothermal Processing Technology for Conversion of Wastewater Solids to Fuels},
author = {Marrone, Philip A. and Elliott, Douglas C. and Billing, Justin M. and Hallen, Richard T. and Hart, Todd R. and Kadota, Paul and Moeller, Jeff C. and Randel, Margaaret A. and Schmidt, Andrew J.},
abstractNote = {Hydrothermal Liquefaction (HTL) and Catalytic Hydrothermal Gasification (CHG) proof-of-concept bench-scale tests were performed to assess the potential of hydrothermal treatment for handling municipal wastewater sludge. HTL tests were conducted at 300-350°C and 20 MPa on three different feeds: primary sludge, secondary sludge, and digested solids. Corresponding CHG tests were conducted at 350°C and 20 MPa on the HTL aqueous phase output using a ruthenium based catalyst. Biocrude yields ranged from 25-37%. Biocrude composition and quality were comparable to biocrudes generated from algae feeds. Subsequent hydrotreating of biocrude resulted in a product with comparable physical and chemical properties to crude oil. CHG product gas methane yields on a carbon basis ranged from 47-64%. Siloxane concentrations in the CHG product gas were below engine limits. The HTL-CHG process resulted in a chemical oxygen demand (COD) reduction of > 99.9% and a reduction in residual solids for disposal of 94-99%.},
doi = {},
journal = {Water Environment Research},
issn = {1061-4303},
number = 4,
volume = 90,
place = {United States},
year = {2018},
month = {4}
}