Cellulase Production by Aspergillus fumigatus Grown on Mixed Substrate of Rice Straw and Wheat Bran

Production of Cellulase and Xylanase by <i>Aspergillus terreus</i> KJ829487 Using Cassava Peels as Subtrates

“…The optimum temperature for growth of fungus may not necessarily be the optimum temperature for production of enzymes, although incubation temperature is a critical factor in enzyme production according to [31]. The result for the cellulase production at 40˚C is in accordance with the work of [32], who also obtained a maximum temperature of 40˚C for A. terreus AV49 using pretreated groundnut shell as substrate, this observation is similar to previous studies carried out by [33] and [27]. Optimal temperature for xylanase in this work is obtained at 40˚C and this is not in agreement with the work of [31] who obtained an optimal temperature for xylanase activity at 28˚C for A. niger, while [34] reported 35˚C for A. terreus UL4206 and [35] reported optimum temperature for xylanase production by A. sulphurous cultivated from agro industrial wastes to be between 30˚C and 45˚C.…”

Effects of Pretreatment of Single and Mixed Lignocellulosic Substrates on Production of Endoglucanase by Bacillus aerius S5.2

“…Jecu (2000) reported that wheat straw (WS) used singly or in higher proportion supported higher endoglucanase production than sole wheat bran (WB) or WS:WB mixtures with higher WB proportions. Similar findings have also been reported for RS:WB mixtures (Sherief et al 2010). Therefore, it may be necessary to optimise the ratios of the mixture components used to achieve significantly higher enzyme production on the MS.…”

Assessment of the Effect of Easily-metabolised Carbon Supplements on Xylanase Production by Newly Isolated Trichoderma asperellum USM SD4 Cultivated on Oil Palm Empty Fruit Bunches

“…Excess moisture increases aerial mycelial growth, lowers oxygen transfer, and decreases substrate porousity, thereby leading to a lower product yield. However, insufficient moisture reduces nutrients and protein solubility due to reduced surface area of the substrate (Shenef et al 2010). Similarly, higher or extemely low temperature denatures synthesized enzymes as well as necessary enzymes needed for growth and other metabolic activities.…”

“…As a consequence of the remarkable improvement in enzyme yields by mixture of some lignocellulosic substrates, recent studies have focused on exploiting the synergistic effect of mixing several other substrates to achieve higher yields of hydrolytic enzymes. Rice straw and wheat bran (Shenef et al 2010), OPEFB and rice husk (Oke et al 2016), and several other combinations (Pathak et al 2014) have been mixed, leading to a higher enzyme titre. Given the inductive abilities respectively of simple easily-metabolised sugars (monosaccharides, disaccharides and less complex polysaccharides) and lignocellulosic substrates on xylanase production, it is presumed that the use of a mixture of these respective substrates could lead accordingly to a more efficient xylanase production.…”