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Advantages and Disadvantages of Disinfectants

The effectiveness of cleaning and disinfection checked by conducting microbiological monitoring of the food products and food contact surfaces. Microbiological monitoring of the product at each stage of production will also provide information about the effectiveness of cleaning and disinfection procedures. When sampling for microbiological monitoring equipment and surfaces in contact with food, required a neutralizing agent to remove residual disinfectant.

Chlorine will form hipoklorat acid (HOCl) in solution. HOCl will eradicate microbes. HOCl formation depends on the pH, the pH between 4-5, HOCl formation will occur optimally. So when the pH varies, the effectiveness of chlorine as a disinfectant does not reach the optimum. When the pH is less than 5, a solution of chlorine becomes corrosive. Treatment is usually done in the factory is keep the pH at 6-7.5, where the solution is not corrosive but still have high levels of HOCl are enough to disinfect.

Sodium and Calcium Hypochlorite will increase the pH of the solution. So the higher the levels of hypochlorite in solution, the higher the pH. With higher pH, the effectiveness of the disinfectant will be much reduced, because the levels of HOCl will be reduced. When the solvent is very hard water (high pH) is likely to be added to the acid in advance, to be effective. Cl2 gas lowers the pH of the solution, therefore, when the addition of chlorine should be controlled. Soda ash can be used to neutralize the pH, because the soda ash will increase the pH of the water.

High temperatures will lead to evaporation of the solution Cl 2 gas and decrease the effectiveness of the solution. Cl2 gas can also disturb pernafasaan. At high temperatures, hypochlorite and chloramine is more stable than chlorine gas and is more effective in killing germs, but this solution is very corrosive and become more corrosive when the temperature rises. So it is recommended for use at temperatures of 20-25 ° C.

Table 7. Advantages and disadvantages and some disinfectants
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The solution makes Sanitary:
In doing sanitation, sanitary solution should be made in advance in accordance with needs. To dilute the disinfectant is recommended to use the standard hard water ie: 17 ml solution of CaCl2, 6H2O 10% (w / v) and 5.0 ml solution of MgSO4, 7H2O 10% (w / v), then added to 3.3 liters of distilled water.