No Pumps, No Fun
Without pumps it is impossible to imagine modern water treatment systems. And indeed the market in pumps is very diverse and, not surprisingly, there are a large number of suppliers of pumps exhibiting at IFAT. Progressing cavity pumps give good performance in conveying media that has a high proportion of dry content, for example, dewatered sludge or manure, silage and biowaste for processing into biogas.
The conveyancing principle is based on a rotor that oscillates in a fixed stator. In particular the design of the stator offers still further optimization potential. Manufacturer Netzsch, for example, is presenting a new stator which is easier to maintain. In the case of the iFD-Stator 2.0, the elastomer is not vulcanized into the stator, but is instead shaped perfectly to fit inside it. According to Netzsch, this means that when it needs to be replaced, it can simply be removed and disposed of as recyclable material. A new stator is quick and easy to insert. In addition the improved design reduces the torque required for start and operation, thus reducing energy costs.
Allweiler is using a new material for the stators in its progressing cavity pumps: Alldur was specially developed for conveying abrasive waste water. The formulation of this elastomer is designed for highest possible wear- and impact-resistance. This increases the service life of the stator and therefore of the whole pump.
Tailor-Made High-Performance Adsorbers
In the treatment of drinking, process and waste water the aim is to remove unwanted substances as efficiently and as thoroughly as possible. For this job the Blücher Group manufactures high-performance adsorbers in the form of 0.2 mm to 0.7 mm spherical particles whose mechanical and adsorptive properties can be individually determined. In order to further improve the performance of the product established under the name of Saratech, the company is currently working on a continuous reverse flow adsorber.
The new system conveys the adsorbents in a reactor in the opposite direction to the flow of water. Then, on site, an associated regeneration technology cleans the spherical particles that have collected the impurities, so that a closed adsorbency cycle is created. The advantages of the process, according to the company, include high filter speed, comparatively low space requirements, and a lower quantity of adsorbents, without any loss of mass. As a result, lifetime costs can be reduced. At IFAT Blücher will be presenting its continuous reverse flow adsorber – currently at the pilot stage – for the first time to a broad trade audience.
How to carry out a very easy UV analysis of water? See next page!
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