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Haisthorpe & Bridlington AMP4 Nitrate & Pesticide Compliance
A £9.6 million project to design and build facilities to bring the Bridlington areas water quality back in line with Drinking Water Inspectorate’s requirements. This included construction of a centralised water treatment works, 48km of pipe work that brings raw water to the newly constructed works and then re-distributes the treated water back into supply, installed mainly through arable land, however included 20 water course crossings, 36 road crossings.
The project involved communications with local authority and land owners who were affected by the scheme. Close involvement with EA was required to ensure that any potential ecological issues were addressed.
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Derby STW Sludge Digesters
A £4 million project for the Construction of 2 No 3000m3 digesters digesters with gas mixing and sludge recirculation, 1 MW CHP plant and all associated equipment, including a new flare stack
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Dinnington STW UWWTD & Fisheries
A £4.76m contract for Severn Trent Water to improve the final effluent quality for a population of 25,600. The works will be capable of dealing with an average flow of 5,950m3/day, with a maximum of 25,488m3/day to Primary Treatment. The contract is to replace the existing 13 No. filter beds with a new six pocket Biological Nutrient Removal Plant to improve the final effluent quality. The process is an advancement on the Activated Sludge Plants built during AMP3 and has only been trialled on a couple of sites within Severn Trent Water to reduce the reliance on chemical usage by the use of a series of anoxic, anaerobic and 4 No. aerated pockets, each internally sized at 12m x 12m x 5m deep. If successful then the packaged plants for P-removal and tertiary sand filters will be removed and incorporated onto other sites. The project is a JV between NMC and Nomenca.
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Derby Sewage
Treatment Works
A £6,700,000 improvement to Severn
Trent Water's Treatment Plant at Derby. Designated Phase
3, the project called for the construction of a new primary
and storm treatment plant at the existing works.
All civil, mechanical and electrical works
were undertaken within the contract which included six
28m Primary Tanks and scrapers, five 34m Storm Tanks and
scrapers, an odour control plant, pumping stations for
storm return, primary and storm desludging. An outfall
into the River Derwent, Control Centres and telemetry.
All structures were founded on concrete piles.
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Langthwaite,
Lancashire - Awarded by United Utilities
This project at £3,700,000 called
for the turnkey design and construction of a 13.4 ML/d water
filtration plant. North Midland Construction entered into
a joint venture partnership with a process contractor for
the Design, Construction and delivery of the contract.
The scheme included both Filter and Chemical Dosing buildings
with a connecting link block. A deep underground backwash,
contact tanks, interconnecting pipework to existing processes,
micro-flocculation and lametta tanks, chemical dosing and
2km of pumping main to a reservoir were also included.
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Wigan UV Treatment
Plant
Undertaken for United Utilities this project
called for the construction, at £3,500,000, of a new
tertiary ultra violet disinfection plant to serve effluent
flows from Wigan and Skelmersdale.
The scope included the design and construction
of a two storey building with external stair accesses. A
3-lane below ground concrete channel for submerged UV equipment.
1200mm concrete inlet pipes which were jacked below an existing
outfall, HV and transformer compounds, RC chambers and flow
diversion works. The Ultra Violet disinfection plant and
all mechanical and electrical works were included in the
contract.
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Arlingham (Gloucester)
Vacuum Resewerage
This contract calls for the construction
and implementation of a vacuum sewerage scheme for Severn
Trent Water on the floodplain of the River Severn south
west of Gloucester.
The programme requires the construction of 24 twin chambered
sealed manholes sequentially linked to a 1400m long 110mm
HDPE butt fused sewer, the sealed system being de-pressurised
to vacuum conditions by a single vacuum pumping station
which discharges to a Submerged Aeration Filter Works constructed
alongside. The manholes are gravity fed from collection
chambers at adjacent properties.
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Seedy Mill, Lichfield,
Staffordshire - Water Main
Provided under a framework agreement held
with the South Staffordshire Waterworks Co. The project
required the construction of a 7km, 700mm ductile iron water
main in a rural location.
Included in the construction were an auger bored rail crossing,
the crossing of a waterway together with road crossings
and two mains connections. The project value, fully disinfected,
tested and commissioned was circa £305,000.
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Derby
STW Odour Control Building
This building was constructed to contain
the odours emmited by untreated sewage as it passes through
the (existing) inlet works. An integral ventilation system
collects the polluted air and channels it through a de-odourising
plant
The building is some 50m x 28m x 12m high
and comprises a portal frame structure clad in masonry blockwork
up to 3.1m, then colour coated composite aluminium cladding
above
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Tertiary Treatment
at Newark
Severn Trent Water appointed North Midland
Construction to construct a new sewage tertiary treatment
plant with a feed pumping station at Crankley Point STW,
Newark.
The project at £2,825,000 included the feed pumping
station and NSAF/Filter block and included a new sludge
belt thickener and sludge holding tank, modifications to
the inlet pumping station, an inlet flow meter, return valve
pipe work diversions and control building ventilation |
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