References from Wapro´s own patented products. WaStop®, WaBack and WaReg solves problems in a secure and efficient way.
WaReg protects homes from flooding in Sweden
|Location: Backaryd, Sweden
Customer: Backaryds Vattenverk
Backaryd Water Treatment plant backwash their filters regularly. During this process water is released into the town sewer network at a rate of 16 l/s. The towns sewer network is dimensioned to cope with 5 l/s so when it receives 16 l/s it becomes problematic for downstream residents. When the backwashing occurs, homes in the downstream area suffer from backflow into their basement through toilets, showers and floor drains.
There is a few different methods to solve this issue. One being to increase the pipe size to accommodate the flow. This however is an expensive solution for a town of 365 people. The more effective and less resource demanding solution is to control the flow, attenuate the excess and only release what the downstream pipes are capable of handling.
New WaReg 3.0 flow regulator protects against flooding
By utilizing effective flow regulation, we at Wapro know that flooding can be minimized and even mitigated. Flood sensitive areas can be protected by directing flow to less sensitive areas.
In Åkersberga, Sweden, the municipality’s water department wanted to prevent water from flooding an industrial area. The water was gathered in an attenuation pond and was then re-directed to dikes at a maximum flow rate of 50 l/s. To regulate the water from the pond, two parallel connected WaReg 3.0 flow regulators were installed via a distribution chamber. During normal levels of flow, only one of the flow regulators operates, whilst under conditions of high water levels both are brought online.
WaReg 3.0 Flow Regulator accurately regulates the flow through open attenuation ponds irrespective of upstream water levels. WaReg 3.0 is designed to suit most applications and is available from DN75 – DN400 for flow from 1 l/sec to 250 l/sec.
Our engineers have worked hard to design a flow regulator that is infinitely more efficient than the common vortex design, and over and above that, we have designed WaReg 3.0 to enable asset owners to adapt flow rates post-installation. All with an ambition to provide the best solution to keep people and property safe.
WaReg 3.0 installed in Åkerberga, Sweden.
Hornsey, London, UK protected against sewer backflow
|Flood defence is a major part of Thames Water’s work across the south-east of the UK. While in most situations traditional flood control techniques can be used, there are some occasions when a problem can only be solved by alternative technologies. One such example is Cross Lane in Homsey, north London, where the sewer network can sometimes struggle to cope with the demands of a modern society. In this case, surcharges overwhelmed the existing pipes and were flowing up through manholes, causing flooding to roads and properties.
When Thames Water investigated the problem, the traditional solution would have been the installation of an anti-flooding device (FLIP) or a new pumping station and while this would resolve the flooding problem, the cost would have run to around £300,000 to protect what, in practice, was a small number of homes.
Aquatic Control Engineering (ACE) approached Thames Water to offer an alternative solution – the WaStop inline check valve. ACE supplied a valve that would fit snuggly inside a DN225 pipe and offer outstanding protection from back flow.
The main body of the WaStop was manufactured in stainless steel 316 which would protect it from possible corrosives in the water. Due to the potential high back pressure, the valve was fitted with a heavy duty cone designed to withstand 8MwC. While the valve is designed to offer outstanding protection it also opens with a low head pressure which means there is no foul water allowed back up the pipes. The ways in which the WaStop offered huge savings include short installation times and a reduction in civil engineering requirements. The installation of the valve was completed in around an hour by a small team from Thames Water.The WaStop check valve is designed to offer maintenance-free operation for 25 year, which means over its lifespan it will keep saving Thames Water money compared to the original proposal.As we see ever more frequent flooding events, the first rea I test of the installation cannot be far but we expect it to pass with flying colours and hope the installation will form the blueprint for similar situations across the country.Thanks to Aquatic Control Engineering in UK.
WaReg – Kävlingeån, SWEDEN
|WaReg has been instrumental in the creation of ponds and wetlands to improve water quality and biodiversity.
Eutrophication of lakes and seas affected by algae blooms, changes in fish stocks, and deterioration of swimming water quality has become a serious problem in many countries. One reason for these problems is changes in land use, but a project in southern Sweden is reversing this trend.
Community developments with expansion of settlements, new roads and agricultural lands and forests have significantly affected water and wetland habitats. Wetland acreage has been drastically reduced, lakes have been lowered or drained, and many ditches have been deepened, straightened or piped. This means the water’s ability to self-purify has been reduced, leading to a decline in plant and animal species dependent upon wetland habitats. The availability of natural areas for public recreation and outdoor activities has also declined.
In 1995, nine municipalities in southern Sweden agreed to work together to improve the environment by raising water quality in lakes and streams and decreasing the efflux of nutrients into Oresund, the body of water between Sweden and Denmark. The project focused on restoring wetlands and ponds and constructing cultivation-free buffer zones along watercourses. In addition to cleaner water, the goal is also to improve conditions for biodiversity and recreation.
Click here to download the full article regarding the Kävlingeå Project as was published in World Water July/August 2011
Disc Flap – Stockholm, SWEDEN
Swedens biggest check valve! The diameter is 1500mm and was delivered to NCC Stockholm. The disc flap was mounted on a surface water pump station in relation to the building of Norra länken.
This type of check valve can be delivered from dimension up to 2000mm and are designed and manufactured by Wapro, Sweden.
WaReg – Åhus, SWEDEN
|During the reconstruction of a new production plant, Vin & Sprit in Åhus, the surface water pipes had to small capacity to recieve water from the new industrial area.
To solve the problem and level out the flow, two surface water magazines in concrete was built. Two Wareg flowregulator was installed in the outlets from the magazines. In this way, you get a exact constant flow from the magazines and the risk of pipe overflows or floodings is eliminated.
Two WaReg were delivered, one with preadjusted flow to 25 l/s and one to 75 l/s.