Problem:

Proper sanitation of the drinking water at OR Tambo International Airport is of utmost importance.  Failure to do proper sanitation will have serious health implications, as most of the 60 mega-liters flow per month, are used for human consumption. 

Sodium Hypochlorite was formally dosed via a chemical dosing pump. The chemical dosing tank were underground, thus 20litre Sodium Hypochlorite drums needed to be de-caned once a month, to fill the 1000litre dosing tank. Sodium Hypochlorite damps use to fill the air, making the work environment uncomfortable and not safe.

The customer had occasional problems with flooding in the pump room, as the 10 bar pressure would push the 6mm Sodium Hypochlorite dosing line out of the dosing point, releasing huge quantities of water into the downstairs pump room.  The customer in question approached Arch Chemicals (Pty) Ltd to propose alternatives for both the chemistry and dosing equipment. 

Solution:

The HTH® Industrial feeder do not need electricity, thus the dosing point could be moved outside the pump room and to the ground level, eliminating the changes for flooding. This also ensures proper ventilation to make sure the operator is not effected by chlorine damps when filling the hopper. The Calcium Hypochlorite solution is injected into the drinking water system by means of a venturi.

The solution Arch Chemicals (Pty) Ltd. offered made perfect sense as it addressed all the customer’s major concerns, where easy to maintain and low in cost. 

Further, the solution offered, ensured more effective dosing, as the drinking water will still be properly sanitized even in the case of power failures.

Down stairs pump room at OR Tambo           

Installation above ground.

Benefits:

• No handling of liquid chemicals.
• Continuous chemical dosing ensures safe drinking water.
• The HTH® 250kg Industrial feeder has proven reliability.
• Dosage can be regulated.