Problem:

Proper sanitation of the incoming raw water at a bottling plant in South Africa is of utmost importance.  Failure to do proper sanitation will have serious health implications, as most of the water is used in the process for the manufacture of cold drinks for human consumption.  Calcium Hypochlorite was dissolved in a tank and it was dosed by means of a small chemical dosing pump into the make-up water line. When the incoming water flow rate increased the Calcium Hypochlorite dosing pump needed to be adjusted manually to ensure the correct levels were maintained for proper sanitation. No holding tank was utilized, thus the incoming flow rate monitoring was critical to the disinfection process. The bottling plant was interested in supplying a certain line for Coca-Cola, but could not meet the safety standards on sanitation that Coca-Cola required.

Solution:

Firstly, the process flow was changed to utilize a water holding tank. This was accomplished by rerouting the water from entering the sand filter, but instead flow to a holding tank and then to the sand filter. On the holding tank a recirculation system was installed, which would pump the water from the suction side of the holding tank pump back to the water entering point. A venturi system was installed on the recirculation line which would remove the chlorine solution from the Pulsar 3. The HTH® Controller was installed and is used to monitor and control the correct free chlorine levels in the holding tank. This would ensure that the holding tank’s free chlorine levels were correct at all times (6-8ppm), which means that water system is properly sanitized. With the bottling plant utilizing the HTH® Controller and HTH Chips they were able to satisfy the Coke Cola sanitation standards resulting in them successfully packing the line for Coca-Cola.

The HTH Controller and Pulsar 3 in action