A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of Process Variables on Food Waste Valorization via Hydrothermal Liquefaction
https://orcid.org/0000-0003-4664-6002
https://orcid.org/0000-0002-7902-3744
We examined hydrothermal liquefaction (HTL) of simulated food waste over a wide range of temperatures (200–600 °C), pressures (10.2–35.7 MPa), biomass loadings (2–20 wt %), and times (1–33 min). These conditions included water as vapor, saturated liquid, compressed liquid, and supercritical fluid and explored both isothermal and fast HTL. The highest biocrude yields (∼30 wt %) were from HTL near the critical temperature. The most severe reaction conditions (600 °C, 35.3 MPa, 30 min) gave biocrude with the largest heating value (36.5 MJ/kg) and transfer of up to 50% of the nitrogen and 68% of the phosphorus in the food mixture into the aqueous phase. Energy recovery in the biocrude exceeded 65% under multiple reaction conditions. Saturated fatty acids were the most abundant compounds in the light biocrude fraction under all the reaction conditions. Isothermal HTL gave a higher fraction of heavy compounds than fast HTL. A kinetic model for HTL of microalgae predicted 2/3 of the experimental biocrude yields from HTL of food waste to within ±5 wt %, and nearly 90% to within ±10 wt %. This predictive ability supports the hypothesis that biochemical composition of the feedstock is important input for a predictive HTL model.
Effect of Process Variables on Food Waste Valorization via Hydrothermal Liquefaction
https://orcid.org/0000-0003-4664-6002
https://orcid.org/0000-0002-7902-3744
We examined hydrothermal liquefaction (HTL) of simulated food waste over a wide range of temperatures (200–600 °C), pressures (10.2–35.7 MPa), biomass loadings (2–20 wt %), and times (1–33 min). These conditions included water as vapor, saturated liquid, compressed liquid, and supercritical fluid and explored both isothermal and fast HTL. The highest biocrude yields (∼30 wt %) were from HTL near the critical temperature. The most severe reaction conditions (600 °C, 35.3 MPa, 30 min) gave biocrude with the largest heating value (36.5 MJ/kg) and transfer of up to 50% of the nitrogen and 68% of the phosphorus in the food mixture into the aqueous phase. Energy recovery in the biocrude exceeded 65% under multiple reaction conditions. Saturated fatty acids were the most abundant compounds in the light biocrude fraction under all the reaction conditions. Isothermal HTL gave a higher fraction of heavy compounds than fast HTL. A kinetic model for HTL of microalgae predicted 2/3 of the experimental biocrude yields from HTL of food waste to within ±5 wt %, and nearly 90% to within ±10 wt %. This predictive ability supports the hypothesis that biochemical composition of the feedstock is important input for a predictive HTL model.
Effect of Process Variables on Food Waste Valorization via Hydrothermal Liquefaction
https://orcid.org/0000-0003-4664-6002
https://orcid.org/0000-0002-7902-3744
We examined hydrothermal liquefaction (HTL) of simulated food waste over a wide range of temperatures (200–600 °C), pressures (10.2–35.7 MPa), biomass loadings (2–20 wt %), and times (1–33 min). These conditions included water as vapor, saturated liquid, compressed liquid, and supercritical fluid and explored both isothermal and fast HTL. The highest biocrude yields (∼30 wt %) were from HTL near the critical temperature. The most severe reaction conditions (600 °C, 35.3 MPa, 30 min) gave biocrude with the largest heating value (36.5 MJ/kg) and transfer of up to 50% of the nitrogen and 68% of the phosphorus in the food mixture into the aqueous phase. Energy recovery in the biocrude exceeded 65% under multiple reaction conditions. Saturated fatty acids were the most abundant compounds in the light biocrude fraction under all the reaction conditions. Isothermal HTL gave a higher fraction of heavy compounds than fast HTL. A kinetic model for HTL of microalgae predicted 2/3 of the experimental biocrude yields from HTL of food waste to within ±5 wt %, and nearly 90% to within ±10 wt %. This predictive ability supports the hypothesis that biochemical composition of the feedstock is important input for a predictive HTL model.
Effect of Process Variables on Food Waste Valorization via Hydrothermal Liquefaction
Motavaf, Bita (author) / Savage, Phillip E. (author)
ACS ES&T Engineering ; 1 ; 363-374
2021-03-12
Article (Journal)
Electronic Resource
English
Valorization of Fly Ash from Municipal Solid Waste Incineration Via Hydrothermal Treatment
| British Library Conference Proceedings | 2001
Waste and biomass valorization
UB Braunschweig | 2010 -