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Juas Water Treatment Works Refurbishment
The refurbishment of Juas Water Treatment Works in the North of the island is now under way aiming to save £5 million over the next 25 years as part of a new water treatment strategy, which in total is forecast to save £10 million of expenditure over the same period.
The works, which plans to have Juas Water Treatment Works operational before the end of 2018, are being carried out by a team of six Guernsey Water staff - three working full time on site, two of which have qualified through Guernsey Water apprenticeships.
This page will follow the team and their work during the refurbishment process.
Juas Water Treatment Works
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This infographic is optimised for use on larger screens but you can still explore the treatment works by tapping on the individual elements in the illustration below. For an optimal experience, we recommend browsing with a larger screen.
Washwater Recovery Tanks
Particles captured in the filter beds will be periodically washed out, this washwater, containing the particles, will then be gravity fed into three of the site's washwater tanks, where the sediment will settle out to form a layer of sludge. The sludge will then be pumped into the sewer network and the remaining water returned to the quarry for future use.
High Lift Pump House
Home to the pumps which will feed treated water into our distribution network. Clean water from the filter beds will flow to the highlift house where it will be treated with ultraviolet light for disinfection and a final dose of chlorine. This ensures wholesome water quality is maintained as it travels through the distribution network to customers' homes. Water samples are taken on a regular basis at this point.
These act as a reserve supply of water within the distribution network to accomodate times of peak water demand.
Random samples are taken from our customers' homes throughout the year to ensure that water quality meets our standards. 1236 individual tests were conducted in 2017
August 2018 - First media layer installed in the filter beds
The gravel media layer of the filter bed laid, the refurbished pipework can be clearly seen in this shot. The next stage of the filter bed works involves the installation of the sand and anthracite media layers.
August 2018 - Filter bed nozzles replaced
There are 900 nozzles fitted in each of the treatment work's three filter beds at Juas, all of which have now been replaced! They can be seen as the white circular parts at the base of the filter bed in this photo
August 2018 - Filter bed pipework preparation
Great shot of one of our production team, hard at work rubbing down pipework in preparation for the next stage of refurbishment!
July 2018 - New Inlet Pipe & Flow Meter
The inlet pipe to the clarifier tanks has now been renewed, and a flow meter installed, raw water will be pumped up through this meter from Juas reservoir to begin the treatment process.
July 2018 - Cleared Filter Beds
The filter beds now looking clear and clean with new pipework in place. They are awaiting the installation of new nozzles before being refilled with a combination of sand and anthracite prior to recommissioning of the works
July 2018 - New Floats
New floats these will float on Juas Reservoir above the low lift pumps which will be suspended 4 metres below. These pumps will feed water from the reservoir to the clarifier tanks where the water treatment process begins.