Title:
Filtration Characteristics of Enzymatically Hydrolyzed and Fermented Biomass Suspensions
Author(s):
Kinnarinen, T., Häkkinen, A.
Document(s):
Paper
Abstract:
Currently, there is a growing need for a deeper understanding of the solid¬liquid separation of biomass suspensions, not least because of the difficulties encountered in most applications. Biomasses are typically highly compressible, have a high water retention capacity and contain substances that may affect the solid¬liquid separation. Conversion of lignocellulosic biomasses to fermentable monosaccharides is commonly performed using various mixtures of enzymes. However, there always remains a certain solid residue suspended in the hydrolysate. For this study, cardboard waste was selected as the model biomass. The solid residues were separated from enzymatically produced hydrolysates using a pressure filter, both immediately after the hydrolysis and after separate hydrolysis and fermentation (SHF). The effects of enzyme dosage, pre¬milling of the biomass and the degree of conversion on the average specific resistance of the filter cakes were investigated. The results show that the average specific resistances of the filter cakes were fairly high and increased with the applied pressure, demonstrating that the filter cakes were compressible; the compressibility indices varied between 0.8 and 1. More complete conversions resulted in higher average specific resistances and lower filter cake porosities. Furthermore, the average specific cake resistance increased significantly as the SHF process proceeded.
Keywords:
bioethanol, enzymatic hydrolysis, filtration
Topic:
R&D on Processes for Solid, Liquid and Gaseous Fuels from Biomass
Subtopic:
Bioethanol production and sugar release from lignocellulosic
Event:
20th European Biomass Conference and Exhibition
Session:
3DO.9.3
Pages:
1586 - 1591
ISBN:
978-88-89407-54-7
Paper DOI:
10.5071/20thEUBCE2012-3DO.9.3
Price:
FREE
