Effect of anatomical fractionation on the enzymatic hydrolysis of acid and alkaline pretreated corn stover
| Autor: | C.L. Crofcheck, K.B. Duguid, L.M. Wendt, Scott A. Shearer, C.W. Radtke, Michael D. Montross |
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| Rok vydání: | 2006 |
| Předmět: |
Environmental Engineering
Bioengineering Chemical Fractionation Husk Lignin Zea mays Hydrolysis Cellulase Enzymatic hydrolysis Sodium Hydroxide Ethanol fuel Biomass Waste Management and Disposal Stover Glucans Chromatography High Pressure Liquid Glucan chemistry.chemical_classification Renewable Energy Sustainability and the Environment food and beverages Water General Medicine Sulfuric Acids Pulp and paper industry Elements Corn stover Agronomy chemistry Solubility Fermentation Carbohydrate Metabolism Xylans |
| Zdroj: | Bioresource technology. 100(21) |
| ISSN: | 1873-2976 |
| Popis: | Due to concerns with biomass collection systems and soil sustainability there are opportunities to investigate the optimal plant fractions to collect for conversion. An ideal feedstock would require a low severity pretreatment to release a maximum amount of sugar during enzymatic hydrolysis. Corn stover fractions were separated manually and analyzed for glucan, xylan, acid soluble lignin, acid insoluble lignin, and ash composition. The stover fractions were also pretreated with either 0%, 0.4%, or 0.8% NaOH for 2 h at room temperature, washed, autoclaved and saccharified. In addition, dilute sulfuric acid pretreated samples underwent simultaneous saccharification and fermentation (SSF) to ethanol. In general, the two pretreatments produced similar trends with cobs, husks, and leaves responding best to the pretreatments, the tops of stalks responding slightly less, and the bottom of the stalks responding the least. For example, corn husks pretreated with 0.8% NaOH released over 90% (standard error of 3.8%) of the available glucan, while only 45% (standard error of 1.1%) of the glucan was produced from identically treated stalk bottoms. Estimates of the theoretical ethanol yield using acid pretreatment followed by SSF were 65% (standard error of 15.9%) for husks and 29% (standard error of 1.8%) for stalk bottoms. This suggests that integration of biomass collection systems to remove sustainable feedstocks could be integrated with the processes within a biorefinery to minimize overall ethanol production costs. |
| Databáze: | OpenAIRE |
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