木薯渣固态发酵植酸酶的中试条件

Phytase Production by Enlarged Solid-State Fermentation of Cassava Dregs

研究了培养条件对木薯渣在箱式固态发酵反应器中用黑曲霉(Aspergillus niger)PD菌株发酵生产植酸酶的影响.结果表明:单因素试验最佳条件为水质量分数75%,料层厚度5～10 cm,接种量1.5%,培养温度32～34℃,培养时间6～8 d.在此条件下,植酸酶活力最高达4 189 μmol/(min·g).

The influence of solid-state fermentation conditions on phytase production with cassava dregs using Aspergillus niger PD strain was studied. The results showed that cassava dregs with 75 % moisture, piled 5~10 cm high at 1.5 % inoculation rate and incubated at 32~34 ℃ for 6~8 days were optimum fermentation conditions for phytase production. The maximum activity 4 189μmolmin·g) of phytase was obtained in such fermentation conditions.