There is plenty in the pipe
An assessment of the works in progress Scottish Water has taken on
On-going investment totalling some £254M is being made in major wastewater
and environmental improvement projects in the north of Scotland.
The Moray Coast Clean-up Project is another Catchment scheme, to build and operate
three separate STWs at Lossiemouth, Buckie and Banff/Macduff. This project,
the biggest public sewerage scheme undertaken along the Moray coast for more
than 100 years, is nearing completion. When fully operational it will serve
55,000 people and end disposal of sewage into the Moray Firth.
Aberdeen’s £80M wastewater treatment project, which will treat sewage
and handle sludge from Aberdeen, Stonehaven, Peterhead and Fraserburgh, is currently
being commissioned. The £14.5M WTW at Loch Ashie brings fully treated
water to Inverness for the first time. It has been built to supply drinking
water to approximately 70,000 customers in the city, North Kessock and Nairn.
The island towns of Lerwick, Stornoway and Kirkwall will receive some of the
most remote infrastructure investments. Lerwick, on Shetland, will receive an
STW; at Kirkwall, on Orkney, there will be new primary, followed by secondary
treatment plants and a new outfall; Stornoway on the Western Isles will also
get a new STW, outfall and collection system.
Major water and wastewater projects costing over £81M are currently underway
in the east of Scotland. The £45M Levenmouth STW is a PFI project due
to be handed over in 2003. The new STW will handle some 12,000t/pa of sludge
that would previously have been discharged into the Firth of Forth. UV treatment
is being used to ensure low bacterial and viral levels.
The Kirkcaldy Waste Water Treatment Works, designed to service a combined residential
and industrial population of approximately 61,000, is due to officially open
later this year. A new secondary treatment works, which incorporates the original
headworks at Pathead has been constructed. Treated effluent will be discharged
to sea via the original outfall pipe.
Costing £10M, the Berwickshire Coastal Strategy, which is being implemented
in stages, is a far-reaching scheme to upgrade existing wastewater facilities
at various locations along this stretch of eastern coastline. Prior to the scheme,
the majority of sewage discharged into the sea was untreated.
Work at St. Andrews, due to be officially opened this summer, involves a new
storm management system in the town, three new storm tanks and the upgrade of
two existing storm tanks to include 6mm screens. The final phase of the project
included the construction of a new state-of-the-art STW on the outskirts of
the town at Kinkell Ness.
A new Newport/Tayport STW, currently in the planning and development stages
will replace existing outfalls discharging untreated effluent. The Waterway
Consultancy has been commissioned to undertake a detailed feasibility study
to identify the treatment options for the catchment area of Newport, Wormit
and Tayport, and carry out an environmental study of the area.
More than £100M will be invested in a new treatment plant and service
reservoirs on the outskirts of Glasgow (WWT, January 2002).
This scheme is one of the largest single capital investment projects of its
kind undertaken in Scotland.
Until the latest round of European water quality directives, little treatment
was required for the water supply from Loch Katrine. However, West of Scotland
Water which started the project last year, gave the Scottish Executive an undertaking
that water supply regulations will be met by December 2005. Approximately 400
Ml/d of water from Loch Katrine are treated at the existing Milngavie WTW, which
handles 80% of the water supplied to the population of Glasgow.
The Katrine project comprises two main elements: a new WTW located near the
existing Craigmaddie and Mugdock reservoirs and Milngavie WTW, and a new service
reservoir on the northern fringe of the city.
In addition, new pipelines will be laid to convey water to and from the new
treatment facility and the storage reservoirs. The environmental sensitivity
of the project meant intensive work by the old water authority and now Scottish
Water to reassure local residents the site will not pose them serious problems.
Gus Watt, manager of the Katrine Water Project said the Milngavie site had
been chosen from 17 possible locations, adding: “The project team is mindful
of the great historical legacy of the Loch Katrine system left to us by the
Glasgow City fathers and it is certainly our intention to build upon this.
“It is a well known fact that Loch Katrine water has a reputation for
its clarity and purity. The high quality water has served the people of Glasgow
well and at a very low cost. However, with the application of new regulations,
the existing level of treatment will not conform to the required standards.”
The contractor is Stirling Water which comprises MJ Gleeson, management and
contracting; Thames Water, treatment process design; Montgomery Watson Harza,
civil engineering consultancy. Construction is expected to begin during summer
2002 and should take 33 months to reach the commissioning stage. It is expected
to take a further six months before the works becomes fully operational.
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