Abstract:

Candida tropicalis has been used for treating ramie bio-degumming wastewater.The effects of Candida tropicalis under the conditions of different ages and nitrogen sources(urea,ammonium oxalate,ammonium sulfate,diammonium phosphate,and amchlor) on ramie bio-degumming wastewater treatment efficacy and single cell protein yield are studied.The results show that the age of Candida tropicalis does not have much influence on COD removing rate,but the influence on single cell protein yield is obvious.Taking both of them into account,the treatment efficacy of 28 h aged Candida tropicalis is the best.Among the five kinds of nitrogen sources supplied in the experiment,it is found that diammonium phosphate has the best effects on COD removal from ramie bio-degumming wastewater and single cell protein yield.Therefore,diammonium phosphate is the ideal nitrogen for substituting peptone.

Key words: Candida tropicalis, ramie bio-degumming wastewater, nitrogen sources, single cell protein yield

摘要：

利用热带假丝酵母(C.tropicalis)处理苎麻生物脱胶废液,研究了不同种龄及不同氮源(尿素、草酸铵、硫酸铵、磷酸氢二铵、氯化铵)条件下,热带假丝酵母对苎麻生物脱胶废水的处理效果及单细胞蛋白的产量(以菌体干重计)。结果表明:种龄对于废水COD去除率的影响不大,但对单细胞蛋白生成量的影响较大,兼顾二者,以28 h种龄的菌的处理效果最佳;在试验供试的替代氮源中,磷酸氢二铵对于苎麻脱胶废水COD的去除和单细胞蛋白的产量最为有效,是替代蛋白胨的理想氮源。

关键词: 热带假丝酵母, 苎麻生物脱胶废水, 氮源, 单细胞蛋白产量

CLC Number: 

• X703