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Grundfos Alldos is disinfection supplier for Europe's largest open-air swimming pool
A swimming pool of lake-size proportions measuring 11,000 square metres adorns the
completely redeveloped ground-level and subterranean workings of Frankfurt's Freibad Brentano
From September 2005 to April 2006, the Brentano pool in Frankfurt am Main was completely
modernised at a cost of around Euro 3 million. Measuring up to 220 metres long, 60 metres wide
and with a water surface area of 11,000 square metres it is currently the largest open-air
swimming pool in Europe. We are very happy that Bäderbetriebe Frankfurt (BBF) also chose
Grundfos Alldos equipment for the measurement, control and dosing systems involved in this
major project.
Two years ago, BBF decided to equip their swimming pools in Frankfurt with Grundfos Alldos
water disinfection products and systems (as we reported in edition 11/04). The pool operators
also wanted to stick with this approach for Europe's largest open-air swimming pool and benefit
from the outstanding expertise Grundfos Alldos has gained over decades of working in swimming
pool water treatment.
The new Brentano pool has the appearance of a large idyllic lake, bordered by hedges and trees
and with a gently inclined shore in the area for non-swimmers. Under its concrete base is a fresh
water supply system boasting some 1,100 vertical inlet nozzles.
More than 10,000 metres of piping with a diameter of up to 600 mm has been laid underground. Some
800 litres of freshly treated pool water flow through the filter system (four steel filters measuring
approximately 6 m in diameter) every second. This is the equivalent of five full bath tubs.
The coloured plastic laminate on the bottom of the pool is also new. It changes from a deep blue in
the swimmer's area, to light blue in the non-swimmer's area and a sand colour in the beach area.
The pool's baptism of fire is already behind it - with some 10,000 visitors a day and temperatures
reaching 35°C, all parameters - whether chlorine content or pH value - have been perfectly maintained
by the following Grundfos Alldos products:
- Two DDI 209 digital dosing pumps with the Plus³ calibration system for precise dosing of PAC flocculents
- One DDI 209 for pH value correction
- Two DIP compact measuring systems with pressure-proof
measuring cell and hydromechanical electrode cleaning
- Seven Vaccuperm C113 chlorine gas dosing units with
servomotor for the addition of chlorine gas
- Four Vaccuperm GS 146 vacuum regulators for direct
installation on the chlorine gas drums, with pressure gauge and liquid trap
- One vacuum change-over device for automatically changing over gas containers
- One Conex® DIS-G gas warning unit
ALLDOS Eichler GmbH
Reetzstraße 85
D-76327 Pfinztal
Tel.: (+ 49) 7240 61-0
Fax: (+ 49) 7240 61-177
E-mail alldos.de@alldos.com
www.alldos.de
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