高壓氣體對(duì)液體殺菌的試驗(yàn)研究.pdf

1、重慶大學(xué)碩士學(xué)位論文高壓氣體對(duì)液體殺菌的試驗(yàn)研究姓名：柏冰申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：動(dòng)力機(jī)械及工程指導(dǎo)教師：盧嘯風(fēng)20050401重慶大學(xué)碩士學(xué)位論文 英文摘要IIABSTRACTThe traditional sterilization methods have a lot of shortage while the sterilizationwith high- pressure gas has many advantages suc

2、h as innocuity, high efficiency,user- friendly, low cost and so on. This method won’ t change the intrinsic flavor whenused in food industry. It also is environmental friendly when used to get rid of thesullage.A test- b

3、ed used for sterilization by high- pressure gas experimental study basedupon the reference of experimental study abroad was constructed. Moreover, theexperimental study of sterilization by high- pressure CO2 carried on f

4、irstly in China aftersolving the problem of design, installation and experimentation.The material for experiment includes beer yeast, high- pressure CO2 used mostlywhile N2 and air used for comparison.The experimentation

5、 includes basically four aspects:(1) Bactericidal effect of three kinds of gas with different pressure.(2) Bactericidal effect of three kinds of gas with different time of operation.(3) Bactericidal effect of three kinds

6、 of gas with different concentration of yeastliquor.(4) Bactericidal effect of three kinds of gas with different aperture of gasdistributing pipe.The test results show that:(1) It is impossible to use high- pressure gas

7、for sterilization.(2) The bactericidal effect of three kinds of gas has almost no differ in the samesituation. The bactericidal effect of high- pressure CO2 is the best and high- pressure N2next to it. The inactive rate

8、of high- pressure air is somewhat lower than rate ofhigh- pressure N2.(3) The dissolved CO2’ s acidity can also make yeast which is not break up deadand the inactive effect will be enhanced when time raising, but, it has