Energy and phosphorous recovery through hydrothermal carbonization of digested sewage sludge
Entity
UAM. Departamento de Ingeniería QuímicaPublisher
ElsevierDate
2020-03-10Citation
10.1016/j.wasman.2020.03.004
Waste Management 105 (2020): 566-574
ISSN
0956-053X (print)DOI
10.1016/j.wasman.2020.03.004Funded by
Authors greatly appreciate funding from Spanish Ministry of Economy and Competitiveness (Project CTM2016-76564-R; project RYC-2013-12549) and Madrid Regional Government (Project P2018/EMT-4344). Authors thank to Instituto Colombiano de Crédito Educativo y Estudios Técnicos en el Exterior (ICETEX) (Colombia) as part of the grant awarded to José Marin-BatistaProject
Gobierno de España. CTM2016-76564-R; Comunidad de Madrid. P2018/EMT-4344Editor's Version
https://doi.org/10.1016/j.wasman.2020.03.004Subjects
Anaerobic digestion; Digestate; Hydrothermal carbonization; Phosphorus recovery; QuímicaRights
® 2020 Elsevier Ltd.Esta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional.
Abstract
This work evaluates the potential of hydrothermal carbonization (HTC) to valorize the digestate derived from the anaerobic digestion of sewage sludge into useful materials for P and energy recovery. The hydrothermal treatment of digestate at 180–240 ºC did not lead to high-rank hydrochars. On the other hand, inorganic P concentration did not change with the temperature, while as the carbonization temperature increased, the organic P retention yield in hydrochar became lower, increasing the total P in the process water obtained at the highest temperature, up to 25.3%. P recovery from acid leaching of the hydrochar obtained at 180 ºC, via precipitation with CaO at pH up to 9, led to a brown solid precipitate with total P content close to 42 mg g-1 , in the range of low grade phosphorus ores. Moreover, acid leaching reduced by 50% the ash content, yielding lignite-like upgraded hydrochars with higher heating values in the range of 20.5–23.1 MJ kg-1 , fairly interesting as solid fuels. Anaerobic digestion of the process water enabled additional energy recovery in form of biogas (325 and 279 mL CH4 g-1 VS -at standard temperature and pressure; STP- from the process water resulting at 180 and 210 ºC, respectively)
Files in this item
Google Scholar:Marin-Batista, J. D.
-
Fernández Mohedano, Ángel
-
Rodríguez Jiménez, Juan José
-
Rubia Romero, María de los Ángeles de la
This item appears in the following Collection(s)
Related items
Showing items related by title, author, creator and subject.