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Perfect water treatment thanks to adjustable rotary lobe blowers

ID: 1561487
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(businesspress24) - 23,000 inhabitants of the Danish municipality of Rudersdal are supplied with drinking water by the municipal water company Birker.

Water treatment from raw water to drinking water is a two-stage process. The raw water is aerated in a first step. This removes unwanted gases such as methane or hydrogen sulfide from the water. The water is also enriched with oxygen in the same process step. This is done so that, after filtration, the drinking water contains the specified five milligrams of dissolved oxygen per liter. In order to obtain the most energy-efficient solution, those responsible opted for two TYR rotary lobe blowers from Busch Vacuum Solutions. These blowers adapt their performance to the incoming raw water quantity by means of variable speed drives, so that it can be guaranteed that the oxygen content in the water is always the same.

In the past, the raw water was enriched with oxygen via so-called oxygen stairs. The disadvantage of this procedure is that there are no adjustment options, i.e. the oxygen content could not be maintained precisely. In addition, high cleaning and maintenance effort was also required.

When the water treatment plant had to be overhauled in 2018, the water company Birkernction to ensure the water supply in case the other system fails. Normally, both aeration systems are used daily on an alternating basis. A TYR rotary lobe blower is connected to each of these aeration tanks. A silencer is mounted on the inlet side in order to keep noise emissions inside and outside the building as low as possible. For plant manager Jens Ejnar Kristensen, the smooth running of the rotary lobe blowers was an extremely important aspect, given that the water treatment plant is located in the middle of a residential area. Since the installation of the two TYR rotary lobe blowers in these aeration systems, Kristensen has been able to precisely maintain the oxygen content and thus ensure a consistently high water quality.

After aeration, the second step involves filtering the water through sand filters. The filtration takes place in two stages: in pre-filters and after-filters. The sand filters remove iron and manganese from the water and convert ammonium into nitrate. The filters must be cleaned of sand deposits at regular intervals. For this purpose, compressed air flows through them, which is generated by two TYR rotary lobe blowers. These rotary lobe blowers are equipped with frequency-controlled motors, meaning that the performance is adapted to the degree of clogging of the filters. At the same time, the flow rate or pressure is prevented from being too high so that the differently grained sand layers are not swirled together.

Two TYR rotary lobe blowers have also been in use here since 2017 in order to regenerate the six pre-filters and the six after-filters. At that time they replaced two obsolete rotary lobe blowers that required a great deal of maintenance and needed to be changed out, as they were too old. TYR rotary lobe blowers are equipped with an acoustic enclosure as standard.

The rotary lobe blowers originally used were unregulated. This meant it was not possible to adjust the volume flow and overpressure to the actual demand. Jens Ejnar Kristensen determined that optimizing the aeration process results in significant energy savings. In addition, the water company Birker

After the raw water has been filtered, it is fed into a 1,000 cubic meter clean-water tank, from where it is pumped into the distribution network directly to the consumer or in a water tower as a reservoir.

With the complete conversion to frequency-controlled TYR rotary lobe blowers, the water company Birker

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Busch Vacuum Solutions is one of the world’s largest producers of vacuum pumps, vacuum systems, blowers and compressors.
Its extensive product portfolio comprises solutions for vacuum and overpressure applications in all industries, including the chemical, semiconductor, medical technology, plastics, and food sectors. It also covers the design and construction of customized vacuum systems, as well as a global service network.
The Busch group is a family-owned company and is still managed by the Busch family. Busch Vacuum Solutions has 3,500 employees in more than 60 companies in over 40 countries worldwide. Busch is headquartered in Maulburg, in southwest Germany. This is the location of Busch SE headquarters, as well as the German production facility and German sales company. In addition to Maulburg, Busch also has its own production plants in Switzerland, the UK, Czech Republic, Korea and the USA.

PressRelease by


Jasmin Markanic
Coordinator Global Press & Media Relations

+49 (0) 7622 681-3376

Busch Vacuum Solutions
Schauinslandstraße 1
79689 Maulburg, Germany

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published by: SabrinaHeinecke
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Date: 10/14/2020 - 11:25
Language: English
News-ID 1561487
Character count: 3771
Firma: Busch Vacuum Solutions
Ansprechpartner: Jasmin Markanic Feedback to about Pressrelease-id:
Stadt: Maulburg
Telefon: +49 (0) 7622 681-3376

Meldungsart: Success
Versandart: send
Freigabedatum: 14.10.2020

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