New Proposal for Sugarcane Vinasse Treatment by Hydrothermal Carbonization: An Evaluation of Solid and Liquid Products

Author(s)

Fregolente, Lais G. ^[1] ; de Castro, Antonio J. R. ^[2] ; Moreira, Altair B. ^[1] ; Ferreira, Odair P. ^[2] ; Bisinoti, Marcia ^[1]

Affiliation

^[1] Univ Estadual Paulista, UNESP, Inst Biociencias Letras & Ciencias Exatas, Lab Estudos Ciencias Ambientais, Dept Quim & Cienc, Campus Sao Jose do Rio Preto, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil

^[2] Univ Fed Ceara, Dept Fis, Lab Mat Funcionais Avancados LaMFA, CP 6030, BR-60455900 Fortaleza, Ceara - Brazil

• Document type: Journal article
• Source: Journal of the Brazilian Chemical Society; v. 31, n. 1, p. 40-50, JAN 2020.
• Web of Science Citations: 0

Abstract

Vinasse is a residue of ethanol production from sugarcane. In view of the problems associated with its disposal, this study aimed to propose a treatment for vinasse by hydrothermal carbonization. The influence of temperature (100 to 200 ºC), acidity (1.7 to 8.3%) and reaction time (12 to 48 h) on the hydrothermal treatment was evaluated, as well the characteristics of the solid (hydrochar) and liquid (process water) products. For the solid product, two hydrothermal carbonization conditions stood out as leading to higher carbonization and yields. These conditions were 200 ºC, 8.3% acidity and times of 12 and 48 h. For the process water, the carbonization reaction at 200 ºC, 8.3% acidity and 48 h produced the highest discoloration and 77% reduction of total organic carbon. Thus, hydrothermal carbonization proved to be an efficient method to treat vinasse, and the hydrochar presents potential for use as fertilizers / soil conditioners, and also the process water after pre-treatment. (AU)

• FAPESP's process: 18/15733-7 - Evaluation of the use of hydrochar for agricultural purposes and of magnetic coal as adsorbent material
• Grantee: Márcia Cristina Bisinoti
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants
• FAPESP's process: 14/22400-3 - Evaluation of the potential reuse of the Bittern and hidrochar obtained from hydrothermal carbonization of vinasse and sugar bagasse with a view to agricultural application
• Grantee: Altair Benedito Moreira
• Support Opportunities: Regular Research Grants
• FAPESP's process: 17/26718-6 - Humic Substances of Hydrochar and soils Amazon Dark Earth: Interactions with Macro and Micronutrients
• Grantee: Altair Benedito Moreira
• Support Opportunities: Regular Research Grants