Autor: |
P A, Marrone, D C, Elliott, J M, Billing, R T, Hallen, T R, Hart, P, Kadota, J C, Moeller, M A, Randel, A J, Schmidt |
Rok vydání: |
2018 |
Předmět: |
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Zdroj: |
Water environment research : a research publication of the Water Environment Federation. 90(4) |
ISSN: |
1061-4303 |
Popis: |
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 to 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 to 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 to 64%. Siloxane concentrations in the CHG product gas were below engine limits. The HTL-CHG process resulted in a chemical oxygen demand (COD) reduction of99.9% and a reduction in residual solids for disposal of 94 to 99%. |
Databáze: |
OpenAIRE |
Externí odkaz: |
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