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Studies on utilization ratio of carbon source and nitrogen source by high quality bacteria with liquid fermentation distillers' grains to produce high feeding-proteins

LI Zheng-yi; ZHOU Ding( Beijing Technology and Business University, Department of chemical Engineering Beijing 100037; 2. Harbin Institute of Technology,Seventh Department,Harbin 150006)  
It was studied that method of analysis detection about utilization ratio of reduclng sugar (carbon source and nitrogen source by the use of high quality bacteria 8503 and 8505, which are cultured in liquid medium of distillers' grains of white spirit, alcohol and their mixture. As mass of oven dry thallus and availability of carbon source and nitrogen source at the same fermentation time were compared, it was found that regularity of utilization ratio of carbon source and nitrogen source by the use the bacteria, which are cultured in liquid medium of three kinds of the distil1ers' grains. After fermentation 48h or 72h, utilization ratio of carbon source raises up to around 90%. Its maximum is 92. 92% in the experiment Generally speaking, utilization ratio of nitrogen source raises up to around 50% ~ 70%,Its maximum is 68. 41 % in the experiment.And after fermentation 72h maximum mass of oven dry thallus is 0. 7839g in 100ml liquid medium of distillers grains.
【Fund】: 国家“八五”“九五”攻关项目
【CateGory Index】: X797
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