what's the difference between sanitation & sterilization
Sanitation is just general cleanliness (and is subjective, relative) whereas sterilization has a very specific meaning (something that is sterile is, by definition, free of all germs and bacteria).
Sterilization is also a surgical technique leaving a male or female unable to procreate. It is a method of birth control. Sanitation is the hygienic disposal or recycling of waste, as well as the policy and practice of protecting health through hygienic measures.