P RACTICAL SKILLS ON THE TOPIC : T HE DEFINITION OF COAGULANT DOSE AND CHLORINE FOR WATER PURIFICATION

P URPOSE This skill is required when carrying out control over the quality of drinking water purification. The doctor should be able to verify the correctness of execution of coagulation and chlorination of water and, if necessary -day consultation on their holding.

P URPOSE A) Coagulation water

1 to determine the amount of disposable water hardness 2 depending on the removable stiffening the table coagulant dose investigated water 200ml 3 Check the selected dose of coagulant (experimental coagulation in three cups) After a 4-coagulant dose 10min choose a glass with the best coagulation. Calculate the dose of 5-coagulant 1L water and any amount of water.

B. WATER CHLORINATION 1- Determine the activity of bleach (CI) 2- Determine activity of 1% solution of HI 3- Conduct pilot investigated water chlorination in three glasses in three doses of chlorine. 4- After 30min determine the residual chlorine in each of the three glasses 5- Select beaker in which the amount of residual chlorine is 0,3-0,5mg / l and the glass therefore calculate the dose of chlorine to 1 liter of water and any number.