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Case Study
EUWA water treatment plants are always tailor-made according to your
specific requirements and local conditions. Piloting may become necessary
when looking for the best possible solution, as the following
ultrafiltration-case study shows.
>> Initial Situation
>> Target of Piloting
>> Installed Design
>> Analysedaten
>> Scheme of the Plant
>> Summary
>> Brochure (pdf)
Initial Situation
The brewery is situated on the banks of a lake and sources all its water from there.
Reasons for action were:
•The existing sand and carbon filters were incapable of supplying a good and constant water quality.
•The water quality deteriorates with decreasing water level of the lake.
•The water quality fluctuates depending on seasonality and rainfall in terms of turbidity.
•As a surface water the brew water quality needed improvement (lack of non-carbonate hardness). The brew water specification was not met.
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Target of Piloting
To improve the microbiological situation right from the beginning and furthermore remove turbidity in a constant manner, ultrafiltration was chosen for the water treatment plant. Due to the fluctuaing raw water quality, piloting of the ultrafiltration was inevitable to achieve proper design data. The piloting tests took place in 2006 over a period of 3 months. Haze free filtrate was produced throughout the trials. After optimization of the backwashing and cleaning process, the ultrafiltration performed constantly with good quality.
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Installed Design
The plant was designed to meet capacity requirements and all quality specifications of the brewery. The main parts are:
•Plant capacity: 150 m3/h.
•Ultrafiltration plant for removal of bacteria and virus (germ barrier) and suspended solids.
•Chemical disinfection with chlorine dioxide in front of the filtered water reservoir.
•Dechlorination of the brew water with activated carbon filtration.
•Increase of Ca non-carbonate hardness in the brew water by the patented Calmix® System.
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Analytical Data (installed design)
Scheme of the Plant
Summary
Taking a global view the mentioned example shows on one hand that the water resources deteriorate in quality and quantity. On the other hand this can be improved by using new technologies in combination with proper design and if necessary piloting.
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