稻谷壳水解及水解液生产单细胞蛋白工艺研究

Study on Hydrolysis of Rice Husk and Production of Single Cell Protein from Hydrolysate of Rice Husk

试验中以稀硫酸对８０目的稻谷壳进行常压（１００℃）二级水解，水解率达２６．８％。以此水解液为碳源，适当添加氨水和尿素，经树状假丝酵母于１０Ｌ气升式发酵罐发酵４８ｈ，产物干基粗蛋白含量可达６２．８％，菌体干重为１２．６ｍｇ／ｍｌ，总糖利用率为８５．７％。

Using two-step hydrolysis by diluted sulphuric acid under common pressure,the yield of reduced sugar to rice husk is 26.8%.With hydrolysate as carbon source,adding ammonia water and urea as nitrogen source,Candida arborea 1.257 was cultured for 48h in a 10L air-lift fermentor.The experimental results showed that the crude protein content of products was 62.8% (d.b.),dry cell weight was 12.6mg/ml,total utilization rate of sugar was 85.7%.