On 16 March 2006, Vitenscontracted Logisticon to build a membrane filtrationinstallation for the Dinxperlopumping station located inVitens Region of Gelderland.The installation consists offour reverse osmosis (RO)membrane skids, which have acombined production capacityof 320 m3/hour. In addition to delivering the membrane filtration installation, the projectalso included the extension of the high-pressure section(distribution pumps), the deliveryof chemical dose-measuringsystems, low- and high-pressurepumps, the electrical systemand the controlling section.

Unique installationThe membrane filtrationinstallation design is based onthe Optiflux concept thatVitens helped to develop.When compared to Vitensexisting Optiflux installations,this project distinguishes itself

in part by the application of anewly developed Bekaert (8”)membrane pressure vessel.The use of this pressure vesselwas a world first for the partiesinvolved. With these pressurevessels the concentrate is discharged in the middle of the vessel.

OptifluxThe reverse osmosis (RO)membrane filtration installationoperates using the Optifluxprinciple, where the pressurevessel is fed from two sides.The main advantage of Optiflux,when compared to traditionalmembrane installations, is thatit provides a saving of 15-20%of energy or membrane surfacearea. Thanks to a lower mem-brane flux in the last stage, theprobability of contamination isreduced. Vitens has alreadyused this patented system,including nanofiltration mem-brane systems, in Zwolle andWitharen.

Softer and cleaner drinking waterVitens will solve two problems at the same time with thenew Dinxperlo plant. In 2007, Vitens will supply the entire Achterhoek area with softer drinking water, becausehigh water hardness leads to scaling and a reduction in theeffectiveness of detergents. The other problem is that foryears the Dinxperlo pumping station has suffered from anincreased level of pesticides and herbicides in the waterextracted from the ground. For this reason, in 2004 a temporary remediation system using active carbon filtration was installed (see LogistiContour 9). This nowwill become superfluous with the new system.

UNIQUE RO INSTALLATIONFOR VITENS

V itens, Netherlands largest water company, supplies drinkingwater to over four million people and tens of thousands of

companies in the provinces of Friesland, Gelderland, Overijssel,the Noordoostpolder and various places in Drenthe. When viewedfrom the number of connections, Vitens supplies approximately a quarter of the Dutch drinking water market.

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I n closed systems, such as district heating systems, the presenceof oxygen in the water is often the cause of a reduced life of

pipes and equipment. An innovative method to remove oxygen uses membranes on behalf of degassing.

Logisticon has installed a numberof small-scale installations, thatrequire in addition to degassingmembranes also high vacuumequipment.

The excellent results, with oxygen levels < 20 ppb beingfeasible, are obtained thanks tothe use of an industrial qualityof nitrogen instead of a techni-cally pure quality. This not only

improves the quality, but alsoresults in a considerable savingin operational costs.

In addition to these goodresults, the compactness of such a system also plays animportant role in the choice of system. Moreover, theseLogisticon-built skids are easyto accommodate in a complexlay out.

INNOVATIVE DEGASSINGUSING MEMBRANES

L ogisticon has a world first in the application of the new Bekaert ‘Centerport’ membranepressure vessel. This concerns membrane pressure vessels where the feed water is

supplied from two sides and the concentrate is discharged in the middle.

These unique pressure vessels are used in thenewly built RO Membrane Filtration plant inDinxperlo (320 m3/h), in the Netherlands.This Vitens Gelderland-owned plant uses theVitens-developed Optiflux concept (seewww.optiflux.nl), which can be used toachieve an energy saving of around 20%.

Following its development, Bekaert has now made this pressure vessel available for production, thanks to various design and production innovations.

These innovations proved necessary to realise the connection in the middle of the 8" pressure vessel, while retaining the strength of the vessel, also at high pressures.

Logisticon will have this innovation on display at 'Aquatech 2006' in Amsterdam(stand no. 01.428) together with Bekaert(stand no. 07.308E) on 26 - 29 September.

A WORLD-FIRSTIMPLEMENTATION

I f you want to choose the treatment techniques to use and the business operations that best fit these techniques, a pilot plant

is the best solution.

Logisticon has an extensive rangeof mobile pilot and demonstrationunits available that can be built/assembled to specification and canbe sold or employed on a rentalbasis. The often very completeplants are available in variouscapacities and versions.

Dependent on the type of water tobe treated, the capacities varyfrom 0.2 to 50 m3/h. Smaller skid-based systems are built asunits into a 20-ft, or larger, container.

The systems vary from multi-stagediscontinuous and continuous(DynaSand®) sand filters, MF,UF and RO membrane installa-tions, MBR systems, DAF andlamella separators, ion exchangeto active carbon filters, degassingtowers, mini biorotor systems,etc.

Small and large systems, fromsimple to very sophisticatedIf you not only want to test on alaboratory scale under laboratoryconditions, but also under actualoperational conditions, we offer awide range of options.

Our extensive range of rentablewater treatment equipment evenallows us to offer the opportunityto carry out a full-scale pilot: youfirst rent and gain experience andsubsequently build a final andoptimum water treatment system. Moreover, the units can be equip-ped with telemetry equipment,allowing the entire installation tobe remotely controlled and moni-tored. If required, visualisedusing Internet technology.

Of course, it is also possible topurchase the pilot plants.

BenefitThe benefit of testing under operational conditions lies in theproper choice of the desired technology and the 100% certaintyof the desired result.

Over or under dimensioning is a thingof the past, as testing is done in operational conditions, allowing thebusiness operations to be optimised.

Customised pilot plants We have constructed pilot plants specifically for various customers.Interested? We would be pleased todiscuss the options with you.

CUSTOMISED PILOT ANDDEMONSTRATION PLANTS

LAMELLA SEPARATOR FORGROUND WATER TREATMENT

L ogisticon has years of experience with the application of submerged/ under pressure membranes for waste water:

the Membrane Bio Reactor (MBR) concept. This concept uses thePuron membrane from Koch Membrane Systems (see picture).

The Puron membrane is extremely reliable and is therefore actuallysuitable for many more water purification applications. As Logisticon likes to be innovative, in cooperation with two customers, this membrane has been used in pilot projects for researchinto the purification of:• iron-rich rinsing water from drinking water filters -

upgrading to drinking water;• surface water -

upgrading to process water / feed water RO.

The results of these ongoing projects are very promising and willprobably be published soon.

A Logisticon customer in the province of Brabant wanted to replace a30-year old lamella separator. To provide convincing evidence that

the new installation would not only operate well on paper but also inpractice, a pilot test was run prior to the order being placed.

The new lamella separator replaces the one installed in the ground watertreatment plant. Logisticon offered a unique opportunity with a full-scalepilot test at a maximum of 25 m3/h. During this pilot, flocculant dosingtests were also carried out. The contamination consisted mainly ofmetals.

The tests were successfully completed within 8 weeks, after which thefinal installation including customised amendments was ordered. Thisenabled the old installation to be replaced while ground water extractioncontinued as usual. Moreover, as a result, the customer had ample timeto make various changes to the area, such as installing a skylight andlevelling the floor and making it resistant to chemicals.

NEW APPLICATIONSFOR SUBMERGEDMEMBRANE MODULE

FIRST SAND FILTERS

FOR THE REEST & WIEDEN WATER BOARD

IN STEENWIJKERLAND, THE NETHERLANDS

T he Reest & Wieden Water Board wanted to halve the amount of nitrogen and phosphate released from the sewage water treatmentplant in Steenwijk into the vulnerable waters of the Weerribben and the Wieden area. In addition, the municipality of

Steenwijkerland was obliged to reduce the emissions from the sewage system in order to comply with the requirements of the so-called 'basic effort' by 1 January 2006, which would mean a considerable investment in the construction of peripheral facilities.

The most effective solutionwas for all parties to worktogether to achieve the results.A filter installation theoreti-cally necessary for as little asthe basic effort was madetwice as big and the executionof an installation in to stageswould make it possible towork cheaper and with a betterresult. The project in partcame about as a result of a50% subsidy from theProvince of Overijssel for theefforts to reduce nitrogen andphosphate emissions furtherthan that legally required. The development makesSteenwijkerland the firstmunicipality in the Netherlandsto install sand filters at a sewagewater treatment plant.

It was decided to implementthe filter installation as twoseries-connected stages to beable to achieve the MTR qualityfor nitrogen and phosphate.

In the first continuous filtra-tion stage, nitrogen is removedby adding a carbon source.This is followed, after aerationand the addition of iron toremove phosphates, by a seconddiscontinuous filtration stage.The purified water is thenaerated again before being discharged into the water ofSteenwijkerdiep.

Within the framework of the"Wieden Helder" project, theReest & Wieden Water Boardand the Steenwijkerland muni-cipality awarded Nordic WaterBenelux the contract to con-struct a complete two-stagesand filtration plant.

The contract was carried outjointly with Logisticon WaterTreatment, with Nordic Watersupplying the continuousDynaSand® filters and the Acetoldosing for the denitrification.

Logisticon was responsible for the entire installation,including the supply of thedephosphatization plant withdiscontinuous sand filters, thepumps, the piping, etc. Thebasic design and site manage-ment was the responsibility ofRoyal Haskoning.

The water treatment capacityis set to 445 m3/h, but thehydraulic capacity is 600 m3/h.The plant was built in a recordtime, with water already flowing

through the plant in January2006 that met the final waterquality requirement of a totalnitrogen content of 2.2 mg/land a total phosphate contentof 0.15 mg/l

L ogisticon has developed a new series of extractor installationswith air filter. The air filters concerned (based on active carbon)

have already been used for years and have proven themselves in prac-tice. However, the air filters can now be fitted as standard with a ven-tilator and, if required, an air heater.

The capacity of the ventilatorsranges between 500 - 5000 m3/hour. To reduce noise, the weather-resistant housing of theventilator is insulated, meaningthat the system can be used bothindoors and outside withoutrequiring additional measures tobe taken.

An important option is that theair filters can be fitted with aheating element, which ensuresthat the active carbon does notget damp.

These air filters are often used toprevent objectionable odoursnear sewage pumping stationsand sewage sludge transfer stations.But they can also be used as(mobile) extraction systems inbuildings where activities arecarried out that can cause objectionable smells.

NEW SERIES OF EXTRACTORINSTALLATIONS WITH AIR FILTER

C ampina in Veghel, the Netherlands, is an international cooperative company that specialises in the development, production, sale and distribution of dairy products.

For products such as milk, milk-based drinks, desserts, yoghurt, cheese and butter, marketed under the brand names Campina and Mona, Europe is the main market.

SOUND DESIGN FORCAMPINA

Another important company activity(under the name DMV International) is thedevelopment and production of ingre-dients for the food and pharmaceuticalsector in the Netherlands, Germany andthe USA. The company sells and distributesthese high-quality products, mainly basedon milk protein and lactose, in more thanone hundred countries.

On the premises in Veghel, various chemicalsare used in the cleaning processes.Through the years, the installations havebeen continually upgraded to meet the production requirements according to the(Health and Safety) regulations.

However, to gain better insight, newly-developed techniques were required tothoroughly overhaul and restructure theseinstallations. The expertise of Logisticonwas called in for the design.

In order to make a safe and optimum design and to support the RFQ (RequestFor Quotation), numerous choices wererecorded in design notes, diagrams anddrawings, and all of this in a short periodof time. Based on this document, DMVhas issued an invitation to tender. Butirrespective of who will realise the project,the Logisticon mark is and will remainvisible in the form of a sound design.

R asenberg Milieutechniek contracted Logisticon to build a mobile pilot system that is used for testing in-situ techniquesand pumping tests at soil remediation locations. Engineering bureaus in particular are very interested in such

systems, as they allow them to run soil remediation tests at an early stage.

SCOUT® WILL EXPLORE THE SOIL

Because during the researchphase there is no electricityavailable at many of the locations that need remediation,the installation has a built-ingenerator so that it can operateindependently.

All systems are fitted with elec-tronic measurement equipmentfor measuring pressures andflow rates. The measurementdata can be collected in anextensive telemetry system andpresented in clear tables andgraphs.

Rasenberg Milieutechniek employsthis test installation under thename of SCOUT® , which is the abbreviation of SaneringConcept Onderzoek Uitvoerings-Technieken, meaning remedia-tion concept for research intoexecution techniques.

The installation is fitted withsystems for compressed airinjection, soil vapour extraction,water extraction using Dual MediaVacuum Extraction (DM-Vex®)and water extraction using apiston pump.

S ince 1998, Logisticon has worked together withorganisations including Bioclear on the development

of a concept to stimulate the natural decomposition ofPer and Tri in the soil using anaerobic bacteria and acarbon source.

As soon as the soil is seeded with sufficient bacteria,the installation can be removed and the bacteria will dotheir job, without causing annoyance to the surroundingarea. In 2004, this resulted in the construction of amobile bioreactor in a 30-foot container, which is regularly found on site for short periods. This approachis ideal, particularly in urban areas, where there is nodesire to have an installation installed for years.Increasingly more customers at home and abroad areusing this concept. Due to the strongly increasingdemand, it was decided to build and lease more mobileinstallations.

Start remediation immediatelyBecause Logisticon keeps the bacteria alive in the reactor, no precious time is wasted growing sufficient biomass. When the container arrives, an almostimmediate start can be made on introducing the active anaerobic bacteria, the carbon source and nutrients, so that inconvenience can be kept to the minimum.

BIOLOGICAL IN-SITUREMEDIATION OF PER AND TRI

www.logisticon.com

‘LogistiContour’is an issue of:

Logisticon Water Treatment b.v.Energieweg 2, 2964 LEIndustrieterrein GelkenesP.O. Box 38, 2964 ZG Groot-Ammers, NederlandPhone: +31 (0) 184 - 60 82 60Fax: +31 (0) 184 - 60 82 80E-mail: water@logisticon.com

C o l o f o n

F ar-reaching dephosphatization within the context of the integral town and country plan forVeluwe Randmeren was the reason for the Veluwe Water Board to test a number of filter types at

the Harderwijk RWZI. The objective of the test was to investigate whether and how, using filtration,the phosphate content in the discharge from the settlement tank could be substantially reduced andwhat filtration rates needed to be used. The latter to prevent over or under dimensioning.

For seven months, various pilottests were carried out usingthree of the following types offilter: double-layer discontinuousfilter, continuous sand filter(DynaSand®) and a double-layercells filter (Automatic BackWash Filter).

The tests were carried out bythe Veluwe Water Board,Volker Wessels Water, Grontmijand Logisticon assisted byNordic Water. In addition to thedelivery of the continuous filter(via Nordic Water) and the discontinuous sand filter(in-house Logisticon design),Logisticon also arranged theother temporary components,including pumps, buffers, control systems, chemicaldosing equipment, compressedair and scavenging air and theconnecting piping.

During this period, the maximumsituation in the future filterunits was constantly simulated.The filters all appeared to operatevery well at reasonable operationand filtration rates. There was amaximum difference of 20%from the filtration rate that wasinitially assumed to be feasible.During the experiments, futuredevelopments were also takeninto account, including the possible more stringent requi-rements that can be placed onthe effluent.

For instance, the UV extinctionand TOC of the effluent fromthe sand filters was measuredfor any future (advanced) oxi-dation techniques using forinstance UV and ozone.

Experiments using active carbonwere also carried out. Theinstallation to be designed willin the first place be easy toamend and in the event of future extensions there shouldbe no disinvestment (no regretmeasure!).

Currently, the last amendmentsare being made to the finalreport. This will allow theVeluwe Water Board to make awell-founded decision, basedon a multi-criteria analysis,about which type of filtrationwill function the best for thedephosphatization in the specificcircumstances of HarderwijkRWZI. This will also provide agood impression for any possiblefuture amendments to the watertreatment process.

SUCCESSFUL COMPLETION OFSAND FILTRATION TESTS ATHARDERWIJK SEWAGE WATERTREATMENT PLANT (RWZI)