Washing and disinfecting of milk pasteurization production line
1. The cleaning and disinfection of dairy equipments must be carried out in two different operation stages. The two processes cannot be carried out at the same time, otherwise the expected effect of washing and disinfection cannot be achieved. In the process of washing and disinfection, washing is more important, and thorough washing is much better than the direct disinfection without washing. Therefore, washing is the first thing, and we should not be rash at all. The used milk sterilizers and pipelines must be cleaned immediately before sterilization.
2. After using the milk pasteurization machines and pipes, wash them with cold water or warm water immediately. If the milk attached to the equipment and pipes is not washed off immediately, it will be denatured if it is allowed to dry. After forming a solid gel film with salt, it will be very difficult to wash them again. Use too hot water with salt to prevent protein from hardening. Keep the water temperature between 38-60 degrees.
3. When washing with detergent solution, the temperature must be kept at 600C ~ 720c, and the detergent solution has the following three functions.
A. Physical function: it can make the fat, protein and salt in the residual milk play the role of milk and anti flocculation.
B. Chemical action: it can make fat saponify and hydrolyze, and generate fatty acid and glycerin, and make protein generate and degrade.
C. Mechanical function: it can wash away the decomposed or loose milk scale and its decomposition products.
The emulsification ability of detergent is related to its surface tension and penetration. The three functions listed above all promote each other.
The temperature of milk tank washing metal appliance equipment and pipeline and detergent solution must be kept at 71-720c, and then washed with 93-940c hot water.
Glassware is usually treated with 60-630c detergent solution, then washed with 38-43 degree water, and then sprayed with 15-16 degree water.
4. All metals, including stainless steel, will be corroded by chloric acid and alkali, especially when soft water is used and its pH value is very low.
5. After washing, utensils, containers, equipment, etc. can be dried by treatment with bactericide solution. When the appliance and equipment are not used, it shall be kept in a fully dry state, because without water, bacteria are not easy to grow and reproduce, so it is necessary to carry out another disinfection treatment before use, even if it has been washed and sterilized the previous night, it shall be treated again before use the next day.