Decomposition of Polyolefins and Higher Paraffins by Wet Oxidation

Bjerre, Anne Belinda; Soerensen, E.

doi:10.1021/ie00027a037

Cited by 7 publications

(1 citation statement)

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“…In some other pretreament methods (e.g., steam explosion), furfural and hydroxymethyl-furfural (HMF) are produced as by-products. This production is most undesirable because of their known inhibitory effect against micro0rganisms,4,~' which has caused many problems for scientists fermenting these potential sugar components requiring a costly detoxification step fol-lowing the pr~treatment.~.~' Von Sivers et al 3" estimated that such a detoxification step would account for about 22% of the total cost of producing ethanol from lignocellulosic materials. However, because the aliphatic aldehydes and saturated carbon bonds are very reactive under wet oxidation conditions; these inhibitors were not expected to be produced or even to be stable in such a system.…”

Section: Introductionmentioning

confidence: 99%

Pretreatment of wheat straw using combined wet oxidation and alkaline hydrolysis resulting in convertible cellulose and hemicellulose

Bjerre¹,

Olesen²,

Fernqvist³

et al. 2000

Biotechnol. Bioeng.

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279

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The wet oxidation process of wheat straw has been studied as a pretreatment method to attain our main goal: To break down cellulose to glucose enzymatic, and secondly, to dissolve hemicellulose (e.g., for fermentation) without producing microbial inhibitors. Wet oxidation combined with base addition readily oxidizes lignin from wheat straw facilitating the polysaccharides for enzymatic hydrolysis. By using a specially constructed autoclave system, the wet oxidation process was optimized with respect to both reaction time and temperature. The best conditions (20 g/L straw, 170°C, 5 to 10 min) gave about 85% w/w yield of converting cellulose to glucose. The process water, containing dissolved hemicellulose and carboxylic acids, has proven to be a direct nutrient source for the fungus Aspergillus niger producing exo‐β‐xylosidase. Furfural and hydroxymethyl‐furfural, known inhibitors of microbial growth when other pretreatment systems have been applied, were not observed following the wet oxidation treatment. © 1996 John Wiley & Sons, Inc.

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Section: Introductionmentioning

confidence: 99%