THE NUMBER OF PERSONNEL FOR THE OPERATION IS DETERMINED BY CONSIDERING THE CAPACITY FOR THE OPERATION OF RIVER WATER TREATMENT PLANTS (THE NUMBER OF EQUIPMENT DEPENDING ON THE CAPACITY). AFTER THE ASSEMBLY, THE DETERMINED OPERATING PERSONNEL ARE GIVEN PRACTICAL TRAINING AT THE FACILITY. IN THE CONTENT OF THIS TRAINING, ALL THE NECESSARY INFORMATION FOR THE OPERATION SUCH AS THE PROBLEMS TO BE ENCOUNTERED IN THE PACKAGE RIVER WATER TREATMENT PLANT, HOW TO FOLLOW THE CHEMICAL RAW MATERIALS ARE GIVEN IN PRACTICE.