brochure roevac vacuum sewers

Roediger Vakuum- und Haustechnik GmbHKinzigheimer Weg 104-10663450 Hanau, GermanyPhone +49 6181 309 - 274Fax +49 6181 309 - [email protected]

ROEVAC® Vacuum Sewer SystemsRoediger Vakuum- und Haustechnik

Above: ROEVAC®Vacuum sewersystem in the rural communityof Rammenau, Germany(approx. 800 PE)

Below: ROEVAC® Vacuum sewersystem for cottages in a hotelresort, Malaysia (approx. 1,500 PE)

Cover front: Site of ROEVAC®vacuum sewer system installed on an artificially created island inthe Gulf area (approx. 23,000 PE)

Cover back: Evacuation of toiletwastewater tanks on boatsat the Olympic Sailing Centrein Athens

Anlagenbau

The Innovative Technology

Advantages and Applications

The ROEVAC®

Vacuum Sewer System

Operation and Components

The ROEVAC®

Vacuum Valve Units

Quality and Reliability

Background and Diversity

Innovation and Expertise

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Roediger Vakuum- und Haustechnik

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Above: Scheme comparisongravity/vacuum sewer

Below left: Gravity sewertrench with manhole. Floodedtrench and sheet piling

ROEVAC®4

Vacuum Sewer Systems

Gravity Sewer Systems

Below right: Vacuum sewertrench installed at minimaldepth. ROEVAC® projectin Southern Africa(approx. 6,000 PE)

5ROEVAC®

Advantages and ApplicationsWhen considering the technical, ecological and financialaspects of wastewater collection, vacuum sewerage provides an effective alternative to other options. TheROEVAC® vacuum sewer system has proved to be a reliable method for collecting wastewater in separatesystems since decades. In comparison to conventionalgravity or pumping systems the ROEVAC® vacuum sys-tem offers the following important advantages to resi-dents and operators:

> Considerable savings in construction costs

> Much shorter construction period

> Pipelines laid in shallow and narrow trenches

> Small diameter pipelines (DN 80 – DN 200)

> Flexible pipeline construction

> Easy to lay pipelines around obstacles

> Sewers and water mains can be laid

in a common trench

> Systems closed to the atmosphere with no

leakage or smell

> No manholes along the vacuum sewers

> One central vacuum station can replace many

several pumping stations

The Innovative Technology The ROEVAC® vacuum technology has been establishedover 40 years and is recommended by numerous independent institutions and organisations acknow-ledged throughout the industry. Today, hundreds of ROEVAC® vacuum sewer systems have been installedsuccessfully throughout the world.

Compared to conventional methods of sewerage,vacuum technology provides major advantages in thefollowing circumstances:

> The topography is flat

> Groundwater table is high

> Sewer system is located near a lake,

river, coastline or floodplain

> Ground has an adverse gradient

> Wastewater flows are highly variable

e.g. holiday establishments or local

recreational facilities

> Difficult ground conditions e.g. rock,

running sands, peat, swamps etc.

> Refurbishment of sewer systems

> Rural area where houses and buildings

are not close to each other

> Crossing rivers, streams, railway

lines, major road etc


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Left: Fast and easy installationof a vacuum sewer in a narrowtrench, Coswig, Germany

Above: Vacuum sewer pipe onPalm Island, Dubai, UAE. Pictorialschematic of the system, consist-ing of vacuum pipes (1), collectionchambers (2) and central vacuumstation (3).

Below left (1): Vacuum sewerpipe with vertical inspection pipeunder construction

ROEVAC®6

Below centre (2): Cutaway of theROEVAC® collection chamber.The valve chamber is separatefrom the wastewater collectionsump.

Below centre (3): Pre-assembled,compact vacuum station installedin a completed building

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Operation and ComponentsDepending upon the topography, wastewater is collect-ed with a radius of many kilometres around the centralvacuum station. Wastewater flows through a conven-tional gravity drain from each house to a ROEVAC® col-lection chamber installed outside the building. When apre-determined volume of wastewater is collected in thecollection chamber sump the hydrostatic pressure activates a pneumatic controller. This controller opens apneumatic vacuum valve and the wastewater in thechamber is completely evacuated into the vacuum sewerpipe. No electricity is required at the collection chamberwith all operations entirely pneumatic.

As air is admitted through upstream vacuum valves thewastewater flows at high velocity through the sewersystem to the central vacuum station. The ROEVAC® sys-tem guarantees maximum operational safety with mini-mum energy costs. In some circumstances the vacuumsewers can be laid using trenchless technology or beplaced above ground.

The Vacuum StationAll the vacuum sewers are connected to the vacuum col-lection vessel installed at the central vacuum station,where vacuum pumps create the required negative pres-sure (approx. – 0.6 bar). The vacuum vessel can be placedinside or buried outside the vacuum station. Transferpumps convey the wastewater from the vessel to thewastewater treatment plant or to an existing sewer.

The capacity and dimensions of the vacuum station aredictated by the particular requirements of the sewersystem. Operation of the vacuum and transfer pumps iscontrolled through a PLC with the ROEVAC® softwaredesigned to ensure optimum demand-driven operation.A standard “compact vacuum station” can be deliveredprefabricated and tested for small sewer systems toservice a small number of houses in villages or buildingson industrial estates. Individual design and constructservices can be provided for vacuum stations for hun-dreds or thousands of houses and buildings.

The Collection ChambersThe water tight ROEVAC® collection chamber is manu-factured in PE-MD with three different designs availablefor the following loading conditions:> pedestrian loading

> flood-proof and pedestrian loading

> flood-proof and traffic loading up to 40 t

In all designs the vacuum valve unit is kept separatefrom the wastewater sump ensuring the ROEVAC®vacuum valve unit remains clean, dry and accessible.

Additional advantages of ROEVAC® chamber system are:> easily adapted on site to suit the level of

house service drains and vacuum sewer pipes

> no smell or deposits

> no electrical power at the chamber

> removable plug for connecting a suction lance

enabling local emptying and easy cleaning

> a stopper can be quickly installed to isolate

the vacuum sewer for valve maintenance

> optimum wastewater sump capacity to ensure

a constant air-liquid flow rate

7ROEVAC®

The ROEVAC® Vacuum Sewer System


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Above: Schematic view of vacuum station with buried vacuum vessel and submersibledischarge pumps

Left: Vacuum station building withburied vacuum vessel, biofiltresand ROEVAC® collection chamberfor condense water (front).

Above: 65mm dia ROEVAC® vacuum valve (diaphragm type)including pneumatically activa-ted controller (in front) and sensor cap (white) installed in acollection chamber

Below: 75mm dia ROEVAC® pinchvalve including pneumatically activated controller (behind)installed in a collection chamber

Vacuum Valve Unit8

Anlagenbau

9Vacuum Valve Unit


Quality and ReliabilityThe valve unit, which works pneumatically, consists of the vacuum valve (diaphragm type) and the associat-ed controller. ROEVAC® vacuum valves are all-purpose,easy to maintain valves with a long design life. There aretwo types of units: the 50mm dia unit is normallyinstalled, but where flow rates are high, e.g. restaurants,hotels and public buildings, the 65mm dia unit is recom-mended.

The ROEVAC® pinch valve was developed for specialapplications in non-European countries. Its robust con-struction and 75mm dia clear flow path makes itparticularly suitable for high flow rates and wastewaterwith high solids content.

ROEVAC® vacuum valves do not require electrical connections. The valves are activated pneumatically byrising water level in the collection sump.

The Vacuum Valve UnitsThe function of the ROEVAC® controller is to open thevacuum valve when the level of wastewater in the sump of the collection chamber is rising, and to closethe valve after the batch volume and a preset amount ofair has been evacuated from the sump. Valve openingtimes and air-liquid flow rates can be adjusted option-ally by the controller.

Roediger can also offer a sump and valve monitoringsystem that includes the street name and house number.

Quality AssuranceThe various components of the ROEVAC® vacuum sewersystem are manufactured to the highest quality stan-dards by Roediger Vakuum- und Haustechnik GmbH inGermany. For example, the reliability of the Vacuum ValveUnits has been proven in an accredited endurance testwith more than 300,000 exhausting-cycles. The companyoperates a quality assurance system complying with therequirements of DIN EN ISO 9001 and EN 1091. Thisensures all components are manufactured in accordancewith prescribed quality control procedures.

All components used in the ROEVAC® system aredesigned in accordance with “DWA-ATV Design ManualA116”.

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Left: The vacuum valve is installed inthe valve chamber of the ROEVAC®collection chamber, separate from the wastewater in the sump.

Centre and right: Covers are available for pedestrian (centre)or heavy-duty loading (right).

Above: Collection and dischargeof wastewater from public areas,F1 Circuit, Shanghai, China,(Wastewater discharge 44 l/s)

Below: Municipality of Gräfenhain,Germany. The wastewater from160 house collection chambersis collected at a central vacuumstation

Diversity10


11Diversity

Innovation and ExpertiseRoediger Vakuum- und Haustechnik GmbH has a historyof more than 160 years and is part of the BilfingerBerger Umwelttechnik GmbH. With its internationalexperience, the company has the expertise to identifyand solve environmental problems.

In the field of vacuum technology Roediger has operatedsuccessfully for over 40 years. Roediger is one of theworld’s leading contractors in the design and construc-tion of vacuum sewer systems. In many countriesRoediger has a local partner or is represented by a localagent. Contact us for details of our local representative.

Background and DiversityWe offer a substantial range of products and evacuation solutions in the following fields:

> Vacuum Sewer Systems

> Vacuum Sanitation Systems for buildings

and ships

> Vacuum Sewer Systems for industrial

complexes

> Evacuation of wastewater from trains and

aircraft

> Management of wastewater from hospitals

> Evacuation of wastewater from Marinas

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Below left: Collection of domesticwastewater by insulated ROEVAC® vacuum sewer lineinstalled in permafrost, Alaska

Above right: Supply and evacuation at apron

Below right: Evacuation of toilet wastewater storage tankson an ICE train

brochure roevac vacuum sewers

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