Supported by Rural Area Project Application in the 12th Five-Year Period(2011BAD14B05);National Key Technology Research and Development Program(2012BAC18B01);Key Program for International S&T Cooperation Projects of China(2010DFB64040)~~
The contamination reasons were analyzed form the viewpoints of strain preparation, air system, medium and equipment sterilization and pipeline configura- tion. Moreover, the contamination-preventing measures were defi...