Optimization of tannase production by Aspergillus glaucus in solid-state fermentation of black tea waste

Bioresources and Bioprocessing

Table 7 Bioconversion of tannins and gallic acid production by A. glaucus tannase

Initial tannic acid concentration (g/L)	The total tannin content	Residual tannic acid concentration	Gallic acid content (mg/ml)	Tannan deposition (%)
30 °C
50	33.6	25.97	37.03	22.71
100	89.6	71.09	28.34	20.66
200	179.2	149.55	23.17	16.55
40 °C
50	33.6	21.90	51.33	34.82
100	89.6	59.27	39.92	33.85
200	179.2	140.39	24.08	21.66