利用甘蔗糖蜜酒精废液生产单细胞蛋白的中间试验研究

Pilot Plant Production of SCP with Stillage from Molasses Alcohol Fermentation

单细胞蛋白(SCP)作为蛋白饲料在发展畜牧业中的重要作用早已为世人所公认,而利用非食用资源特别是废弃资源作原料通过微生物的作用以工业方式生产SCP更有变废为宝的重大意义。云南省有近70家糖厂,大多附设酒精车间,

Intraspecific fusant Ct-3 from Candida tropicalis has been used toproduce sing cell protein(SCP) with the stillage from molasses alcoholfermentation. The yeast was cultured for 8 h in 10m^3 stirred-tankfermentor, the maximum biomass of dry yeast was 25.32g/L, theaverage biomass was 18.57g/L, the maximum specific growth rate was0.39 per hour and the maximum volumetric rate of production was 2.43gper liter hour. The product contains 44.83% protein, 6.08% moistureand 7.25% ash. Its colour was brown-yellow and the quality meets thefirst class standard QB596-82 issued by National Ministry of Light Indu-stry. The pH of the second waste water compared with the originalone has gone up from 3.5 to neutral, and the COD and BOD_5 have cutdown by 73.49% and 75.27%, respectively.