Use of new membrane-reactor saccharification assay to evaluate the performance of cellulases under simulated SSF conditions
- National Renewable Energy Lab., Golden, CO (United States); and others
A new saccharification assay has been devised, in which a continuously buffer-swept membrane reactor is used to remove the solubilized saccharification products, thus allowing high extents of substrate conversion without significant inhibitory effects from the buildup of either cellobiose or glucose. This diafiltration saccharification assay (DSA) can, therefore, be used to obtain direct measurements of the performance of combinations of cellulose and substrate under simulated SSF conditions, without the saccharification results being complicated by factors that may influence the subsequent fermentation step. This assay has been used to compare the effectiveness of commercial and special in-house-produced Trichoderma reesei cellulose preparations in the saccharification of a standardized microcrystalline (Sigmacell) substrate and a dilute-acid pretreated lignocellulosic substrate. Initial results strongly suggest that enzyme preparations produced in the presence of the targeted lignocellulosic substrate will saccharify that substrate more effectively. These results call into question the widespread use of the {open_quotes}filter paper assay{close_quotes} as a reliable predictor of enzyme performance in the extensive hydrolysis of substrates that are quite different from filter paper in both physical properties and chemical composition. 14 refs., 6 figs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 576264
- Report Number(s):
- CONF-960539-; ISSN 0273-2289; TRN: 98:000980-0032
- Journal Information:
- Applied Biochemistry and Biotechnology, Vol. 63-65; Conference: 18. symposium on biotechnology for fuels and chemicals, Gatlinburg, TN (United States), 5-9 May 1996; Other Information: PBD: Spr 1997
- Country of Publication:
- United States
- Language:
- English
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