User:Bavondong1637/sandbox
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Pasteurization http://www.foodsafetysite.com/educators/competencies/general/foodprocessing/processing2.html
Heat Treatment http://www.brighthubengineering.com/manufacturing-technology/30476-what-is-heat-treatment/
EM (Effective Microorganism) http://mmaqua.in/waste-water/effective-microorganism/