Valorization of Residual Biomasses from the Agri-Food Industry by Subcritical Water Hydrolysis Assisted by CO2

Author(s)

Prado, Juliana M. ; Vardanega, Renata ; Nogueira, Gislaine C. ; Forster-Carneiro, Tania ; Rostagno, Mauricio A. ; Maugeri Filho, Francisco ; Meireles, M. Angela A.

• Document type: Journal article
• Source: ENERGY & FUELS; v. 31, n. 3, p. 2838-2846, MAR 2017.
• Web of Science Citations: 4

Abstract

In this work, four residual biomasses from the food industry (coconut husk, defatted grape seeds, sugar cane bagasse, and pressed palm fiber) were subjected to subcritical water hydrolysis assisted by CO2 (SubWH + CO2) with the objective of producing fermentable sugars. Hydrolysis kinetics were determined using a semi-batch unit equipped with a 50 mL reactor. The process was conducted at 250 degrees C for 30 min under 20 MPa. Total reducing sugars recovered using SubWH + CO2 were (wet basis): 13.5% for coconut husk, 10% for defatted grape seeds, 13.2% for sugar cane bagasse, and 11.2% for pressed palm fiber. For coconut husk and defatted grape seeds, adding CO2 increased total reducing sugars by 15 and 56%, respectively. For sugar cane bagasse and pressed palm fiber, adding CO2 to the process did not alter total reducing sugars recovered. In all cases, the byproduct yield increased when adding CO2 to the process. (AU)

• FAPESP's process: 12/10692-4 - Biorefinery in agricultural and food industry: recycling waste for new chemicals and biohydrogen
• Grantee: Tânia Forster Carneiro
• Support Opportunities: Scholarships in Brazil - BIOEN - Young Researchers
• FAPESP's process: 10/08684-8 - Hydrolysis of sugarcane bagasse and palm pressed fiber with sub/supercritical water and CO2: technical and economical evaluation
• Grantee: Juliana Martin Do Prado
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/17260-5 - Extraction process intensification of saponins from Brazilian ginseng (Pfaffia glomerata) using ultrasound and hyphenized processes for integral use of the plant
• Grantee: Renata Vardanega
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 11/19817-1 - Biorefinery in agricultural and food industry: recycling waste for production of new chemicals componds and biohydrogen
• Grantee: Tânia Forster Carneiro
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Young Investigators Grants