Outside the UK
Everswinkel Municipal Utilities Waterworks
In many waterworks, the addition of oxidation air is performed manually by means of simple mechanical valves. With this procedure, an experienced waterworks supervisor can guarantee the quality of the drinking water beyond doubt – however, the procedure can neither be traced nor documented. If the composition or quantity of the drinking water fluctuates, for example due to the changing interconnection of several wells with different water qualities, manual readjustment is necessary, which is costly and time-consuming.
Bürkert provided a packaged, problem-solving solution that is designed to provide flexibility, but save time and costs compared to a fully bespoke solution, making it compact, cost-effective and easy to apply in order to achieve reliable and extremely accurate performance.
“To ensure compliance with the requirements of the Drinking Water Ordinance, which specifies a maximum of 0.2 mg/l iron and 0.05 mg/l manganese, an overdose of oxidation air is generally the result in manual supply of the oxidation air”, explains Hartmut Schmalz, sales engineer for technical systems at Bürkert’s Sales Center in Hanover.
The uncontrolled supply of air to the untreated water can cause unnecessary additional costs due to suboptimal utilisation or potential over-dimensioning of the compressors. If pure oxygen is used for oxidation, only one fifth of the required quantity is needed; however, the oxygen has to be purchased and also causes avoidable additional costs in case of uncontrolled metering.
B. Rengers (Everswinkel Municipal Utilities Waterworks Supervisor) said:
“The intelligent design of the Bürkert oxidator box ensures precise control of the oxygen input based on the current quantity of untreated water. This oxygen quantity is always reproducible and no longer depends on the expertise of the waterworks supervisor. Every year we replace about 10 pumps at the wells, which in the past required one week for adjustment of the oxygen quantity. This adjustment work has now been eliminated and the metering rate is always precise. Due to the precisely controlled oxidation we now have less iron in the treated water tank, which saves us the costly and time-consuming task of cleaning the tank. This also eliminates the subsequent use of disinfectants, which is good for us and the environment.”