Hemicellulases Preparation Methods
The hemicellulase enzymes are produced by fungi, bacteria, yeast, marine algae, protozoans, snails, crustaceans, and insects [74]. A list of microorganisms capable of producing some common hemicellulases is shown in Table 6.3. Filamentous fungi are the most interesting producers of xylanases because they excrete the enzymes into the medium and their enzyme levels are much higher than those of yeasts and bacteria [66]. The common industrial sources of hemicellulases are: Aspergillus niger, Humicola inso — lens, Termomonospora fusca, T. reesei, Trichoderma longibrachiatum, and T. koningii. Besides this, bacteria such as Bacillus sp. have also been used to obtain xylanases for commercial use, as xylanases have many commercial uses, such as in paper manufacturing,
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Table 6.3 Some hemicellulases producing microorganisms and references.
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animal feed, bread making, the juice and wine industries, and xylitol production [74, 76].