COTABARREN Ivana Maria
Valorization of anaerobic digestion liquid residue through the production of organic fertilizer by fluidized bed granulation
COTABARREN, IVANA M.; MORENO, JONATHAN; MARTÍNEZ, ANA L.; CABRERA, FERNANDA A.; PIÑA, JULIANA
CHEMICAL ENGINEERING RESEARCH & DESIGN
INST CHEMICAL ENGINEERS
Año: 2019 vol. 147 p. 113 - 121
In this work the feasibility of developing a solid fertilizer by fluidized bed granulation, usingdigestate (liquid residue from anaerobic digestion) as binder and different minerals as seedsis analysed. Full characterization of the selected mineral particles and the liquid digestatewas performed. Particularly, phosphorous and potassium content was assayed before andafter granulation. Friability and breakage strength of product granules were tested as well.Also, the process operating conditions (bed temperature, fluidization air temperature andflowrate, digestate temperature and flowrate, etc.) that enable stable operation and the pro-duction of completely coated granules were successfully established for lab- and pilot-scalegranulation units.