Optimization of upstream and downstream process parameters for cellulase-poor-thermo-solvent-stable xylanase production and extraction by Aspergillus tubingensis FDHN1

Bioresources and Bioprocessing

Table 6 Comparison of A. tubingensis FDHN1 with different Aspergillus sp. for xylanase yield and productivity

Microorganism	Substrate	Xylanase activity (U/g)	Productivity (U/g/day)	Reference
Aspergillus tubingensis FDHN1^a	Sorghum straw	4,105	821.00	This study
Aspergillus tubingensis JP-1	Wheat straw	6,887	859.90	[20]
Aspergillus niger DFR-5	Wheat bran	4,465	744.16	[11]
Aspergillus fischeri Fxn 1	Wheat bran	1,024	341.33	[37]
Aspergillus fumigates	Wheat bran	1,055	211.00	[38]
Aspergillus fumigates	Sugarcane bagasse/wheat bran (1:1)	821.0	164.20	[38]
Aspergillus fumigates	Soybean bran	558.3	111.66	[38]
Aspergillus niger	Wheat bran	1,285	257.00	[38]
Aspergillus niger	Soybean bran	484.2	96.84	[38]
Aspergillus niger	Sugarcane bagasse/wheat bran (1:1)	1,050	210.00	[38]

^aHighest xylanase yield, 4,105 U/g, was obtained when SSF was carried out using 9 g sorghum straw under optimized physiological (at 5-day incubation, 1:5 (w/v) substrate/moisture ratio, pH 6.0 and 40°C) and nutritional conditions (xylose 0.3%, gelatine and NaNO₃ both at 0.05 g N equivalent in 50 mL medium) along with optimized recovery conditions (at an extractant/solid ratio of 12:1 (v/w), 150 rpm, 90 min and 40°C).