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Vine Trimming Shoots as Substrate for Ferulic Acid Esterases Production.
Applied Biochemistry and Biotechnology 2017 Februrary
Ferulic acid esterases (FAE) possess a large variety of biotechnological applications mainly based on their ability to release ferulic acid from lignocellulosic matrixes. The use of vine trimming shoots (VTS), an agricultural waste, as substrate for the generation of this kind of esterases represents an attractive alternative to change the consideration of VTS from residue to resource. Furthermore, xylanase, cellobiase, and cellulase activities were quantified. Six microorganisms were screened for FAE production by solid-state fermentation, and the effects of the additional supplementation and substrate size were also tested. Finally, the process was scaled-up to a horizontal bioreactor where the influence of aeration in enzymatic activities was evaluated. Thus, the optimal FAE activity (0.44 U/g dry VTS) was attained by Aspergillus terreus CECT 2808, in non-additional supplementation media, using the larger particles size of substrate (≤ 5 mm) and at a flow rate of 0.7 L/min.
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