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TECH TALKEDITORIAL
Edition 05/2004
NEWS & TRENDS
www.hydro-watertreatmentsystems.com
GRANVIN HERADGroundwater, with low pH andhigh iron and manganesecontent, is drawn from two wellsin 10 m depth and transportedfor treatment to the Eidevassverk. The TWK-S 40/23plant has been in operation sinceJuly 2004. The treatment outputamounts to 23 m³/h.
SØR-FRON KOMMUNEThe new treatment plant TWK-S 20/13 in the Gålå vassverk hasbeen connected to the networksince May 2004. The plantproduces 13 to 20 m³ of high-quality drinking water per hourby natural means from groundwater and lake water. Thewaterworks lies at the Peer Gyntopen air stage at the lake. Filter unit in the Gålå Vassverk Closing the building roof in Granvin
CENTRALISSUE
About the benefit ofresearchOne central issue is that ofthe benefit of research anddevelopment. Whereas someare sure that research anddevelopment serves exclu-sively the business world,the others place the benefitto the public in the fore-front. In the end the truthlies somewhere in themiddle.When a good job is done,both sides profit. The busi-ness world because it canopen up new fields and mar-kets thanks to new tech-nologies and therefore earnback its investments. Thepublic because new jobsare created and often theburden on the environmentis reduced as well.Hydro-Elektrik has alsodone excellent groundworkhere. Enormous invest-ments in the last years haveformed the basis forexcellent growth. With theestablishment of ozone biofiltration as well as with thedevelopment of stainless-steel reservoir systems forwater storage. In both fieldsHydro-Elektrik has a largetechnological advantage.In this year this advantagewas the basis for appro-ximately 10 new jobs. Thishas brought Hydro-Elektrikcloser to its target of beingthe market leader. Intechnological respects thishas already been reached -at least partially.
Manfred Brugger
HYDRO-ELEKTRIK AS
Hydro-Elektrik founds a subsidiary inNorwayOptimal service and closeness to customers were the decisive factors for founding the subsidiary Hydro-
Elektrik AS in Bergen. This was Hydro-Elektrik’s reaction to the high degree of interest in the ozone bio
filtration – a natural method of treating drinking water. All the activities in the Scandinavian area are to be
bundled at Hydro-Elektrik AS.
The establishment of ozone biofiltration for drinking watertreatment in Norway was forceddecisively by Hydro-Elektrik.The basis was provided by thesuccessful two-year test phasewith a full-scale pilot plant inTrondheim under the scientificassistance of the Sintef (Prof.Bjørnar Eikebrokk and Dr. EsaMelin) as well as Prof. Dr.Hallvard Ødegaard of the NTFU(refer to the Edition 01/2001 and04/2003).
As a consequence, Hydro-Elek-trik managed to awaken interestin the new technology, and toobtain and realize first plants.Two plants are already inoperation and have beenproducing highest-quality drin-king water since being com-missioned. Commissioning of two
further plants is scheduled forSpring 2005.With the company founding(located in Bergen) Hydro-Elek-trik is reacting to the enormousrise in interest in the newtechnology and is also extendingits consulting and service fields.The independent subsidiary iscalled Hydro-Elektrik ASand is managed by PeterPaskert. Hydro-Elektrik wereable to gain an excellent andcommitted expert in the personof Peter Paskert. Peter is a nati-ve German who has been livingin Norway for 23 years. Thanksto his previous jobs in the waterindustry he is well acquaintedwith the topic, speaks German,Norwegian and English fluentlyand therefore ensures excellentcommunication between custo-
Hydro-Elektrik AS
Peter Paskert(Managing Director)
Litleåsveien 49Postboks 46 Nyborg5871 Bergen
Tel. +47 55 25 93 00Fax +47 55 25 93 01Mobile +47 90 20 67 78
mers, subsidiary and parentcompany.
Sør-Fron kommune, Gålå vassverk
Hydro-Elektrik AS, Office in Bergen
Oslo
Bergen
PERSONAL
TECHNOLOGY & SOCIETY
PUBLISHED
www.hydro-watertreatmentsystems.com
PublisherHydro-Elektrik group
Angelestraße 48/50D-88214 Ravensburg
Telephone +49 (0) 751 / 6009 - 0Fax +49 (0) 751 / 6009 - 33
EditorManfred [email protected]
LayoutSilvia Mesmer
Company publicationNot to be reprinted even in the form ofextracts without express permission inwriting. Hydro-Elektrik GmbH canaccept no liability for unsolicitedmanuscripts or photographs.This publication is sent free of chargeto interested parties. All legal claimsare excluded.
CHANGES IN THE TEAM
Increasing tasks also meansan increasing team. In 2004the following changesoccurred:Since April our installationteam has been supplementedby Klaus Hammon (22). Hewas trained as a plant fitter insupply technology at the“Neptun“ repair dockyard inRostock.Master electrician Gerhard App(47) has been supplementingthe service team since Augustwith his wide range of expe-rience in mechatronics, thusincreasing the service team tofive service technicians.Sebastian Fugel is starting hisworking career in the work-shop. At the age of 16 Sebas-tian is the youngster in ourteam. He is training as a mecha-tronics specialist. Robert Mor-gen (28) has been studyingmechanical engineering at the“Berufsakademie“ (college)since October and is doing hispractical training at Hydro.Paul Spannaus (22) andNorbert Buemann (39) arenew in our planning team.Paul Spannaus completed hisdegree as an engineer (Dipl.-Ing.(BA)) at the “Berufs-akademie“ (college) withgreat success and now worksin the hydraulic planningteam. Norbert Buemann(Dipl.-Ing.(FH)) studied elec-trical engineering and hasbeen supporting the electricalplanning with his worldwideexperience in plant auto-mation since October.Volker Schmidt (38) has alsobeen working for us sinceOctober in stock manage-ment. Schmidt succeeds ourstore keeper of many yearsstanding, Helmut Schermaul,who will go into his well-earned retirement on 01/01/2005 after 18 years in ourcompany.We wish that all our “begin-ners“ will enjoy working in theHydro-Elektrik team, ourapprentice a successfulapprenticeship and ourretiree the best of health inhis “restless“ years.
SWIMMING POOL TECHNOLOGY
On the way to “feel-well“ waterThe water quality in swimming pools and baths is a fundamental factor for the degree of acceptance of a
pool by the users. The HYDROZON® process technology which does not use chlorine is pathbreaking.
Everyone emits unwantedsubstances into the water whenbathing. Thorough showeringand washing cannot prevent this.These emissions include micro-organisms, viruses, causes ofcontagious diseases, excretions,skin particles, fungi, skin careproducts, etc. When bathing inthe bath tub, this does notrepresent a problem, since thebath water is generally only usedby one person.
However, in public baths severalhundred persons often share thesame water at the same time, thuscausing the water pollutionmentioned above. Bath watermust therefore be treated and
disinfected continuously throughcorresponding measures forhygienic reasons and in order toavoid epidemics. If one tried tosolve the problem of watertreatment simply by “diluting“ it,enormous amounts of freshwater and energy would berequired.Therefore the water inswimming pools and baths isusually circulated via a watertreatment system. An importantstep in water treatment is theformation of a disinfectant depotin the pool water. Its task is inparticular the immediatedegerming of the water in orderto prevent the direct transfer ofdisease-causing agents to otherbathers. In the field of swimmingpool technology, disinfectionprocesses on the basis of ozone,chlorine and/or bromine areused. However, this chemicalprocess requires good watermixing and intensive pool flow.This also involves a good andeven surface discharge in orderto remove floating matter such ashairs and slime from the pool.Problems with the water qualityare often due to a bad poolhydraulics. On the other hand,the use of unsuitable and instablematerials can cause follow-upproblems. Foil linings, bondingagents and joint materials arehighly problematic. Draining ofthe pool perimeter is also an HYDROZON® unit, type P10
important factor. If designedincorrectly, detergents caninfluence the water qualitynegatively. Expert and exactplanning of all the details istherefore essential.Permanent excellent waterquality with “feel-well“ watercan be ensured by theapplication of the chlorine-freeHYDROZON® process tech-nology. A highly efficientoxidation and disinfection isachieved through the integratedozone stage. The disinfectanthypobromous acid is generatedin the process. The plantsoperate fully automatically andgenerate a pleasant almostodorless bathing water to makeyou feel well.
“Fell-well“ water
reaction depending on the pHvalue. As the graphic shows, theshare of acids that disinfecteffectively drops as the pH valueincreases. An excellent degreeof disinfection is attained in theneutral range around pH=7.
The term disinfection means thereduction of germs on objects orin liquids. Disinfection shouldtherefore not be confused withsterilization (= absence ofgerms).Disinfectants containing chlorineor bromine are used to disinfectwater. The pH value is oftendisregarded when consideringwater disinfection.The disinfection can be in-complete in particular at high pHvalues - even if the disinfectantis assumed to be sufficient. Thisis due to the dissociation of thematter in water.This process - also calledprotolytic reaction - is a balance
DISINFECTION
Importance of the pH value
Protolytic reaction of bromine andchlorine
