Download Biomass recalcitrance: deconstructing the plant cell wall by Michael Himmel PDF

By Michael Himmel

Substitute and renewable fuels derived from lignocellulosic biomass provide a promising replacement to standard strength resources, and supply strength protection, monetary development, and environmental merits. even though, plant mobile partitions certainly face up to decomposition from microbes and enzymes - this collective resistance is named "biomass recalcitrance". step forward applied sciences are had to triumph over obstacles to constructing good value strategies for changing biomass to fuels and chemical compounds. This publication examines the relationship among biomass constitution, ultrastructure, and composition, to resistance to enzymatic deconstruction, with the purpose of studying new least expensive applied sciences for biorefineries. It comprises chapters on issues extending from the top degrees of biorefinery layout and biomass life-cycle research, to specific facets of plant phone wall constitution, chemical remedies, enzymatic hydrolysis, and product fermentation innovations. Biomass Recalcitrance is vital interpreting for researchers, method chemists and engineers operating in biomass conversion, additionally plant scientists operating in mobile wall biology and plant biotechnology.

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Sometimes in the literature the term “integrated biorefinery” is used (9) and is generally used in the context that a number of unit operations or technologies are used in an integrated manner to convert biomass to fuels and chemicals, so essentially the terms “biorefinery” and “integrated biorefinery” are interchangeable in the literature. A good explanation of the stages or phases of biorefineries is provided by Kamm and Kamm (10) and Van Dyne and coworkers (11). They explain the progression of biorefineries in three phases as the technology develops to move from the simple, easily processed feedstocks at lower volumes to the more difficult to process lignocellulosic biomass feedstocks at higher volumes.

There are two primary routes for saccharification: 1) acid hydrolysis, with either concentrated or multiple stages of dilute; and 2) pretreatment followed by enzymatic hydrolysis. In the 1980s, DOE evaluated the long-term potential of each process (31) and although at the time acid hydrolysis technology was further developed and appeared less expensive, comparing progress and future potential suggested that enzymes offered greater opportunity for ethanol cost reduction in the long run (32). Acid hydrolysis technologies are certainly feasible and in proper niche situations they are being pursued to commercialization.

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