Adding value to lignocellulosic wastes via their use for endoxylanase production by Aspergillus fungi

DÍAZ, GABRIELA V.; CONIGLIO, ROMINA O.; VELAZQUEZ, JUAN E.; ZAPATA, PEDRO D.; VILLALBA, LAURA; FONSECA, MARÍA I.

MYCOLOGIA.

ALLEN PRESS INC

Lugar: Lawrence; Año: 2019 p. 1 - 11

0027-5514

Agroforestry industries in the world generate lignocellulosic wastes that can be a huge problem ofpollution, or the wastes can be used for different biotechonological applications such as substrates for microorganism growth and enzyme production. Fungi such as Aspergillus niger cangrow in almost every substrate and produce hydrolytic enzymes such as endoxylanases, givingadded value to agroforestry wastes generated by industries in the northeast of Argentina. In thiscontext, the aim of this work was to use agroforestry wastes as substrates for the production ofendoxylanases by Aspergillus niger and to optimize nitrogen sources and physical variables for thehighest endoxylanase activity. A. niger LBM 055 and A. niger LBM 134 produced high endoxylanaselevels when they were grown with sugarcane and cassava bagasses as carbon sources. A. nigerLBM 134 reached the highest endoxylanase activity when nitrogen sources and physical variableswere optimized. The fungus exhibited up to 110 U mL−1 of endoxylanase activity when it wasgrown with sugarcane bagasse and more than 160 U mL−1 with cassava bagasse. Therefore,endoxylanase production was optimized using agricultural bagasses and cost 20 times less thanenzyme production using synthetic xylan