Waste Water Treatment in Scotland
description
Transcript of Waste Water Treatment in Scotland
Waste Water Treatment in Scotland
Dalmarnock
Dalmarnock
• Opened in 1894
• Processed sewage dried and pressed
• Initially the processed sewage was sold as Globe fertiliser
• Laterally a pipeline was built connecting Dalmarnock to Shieldhall.
Dalmuir
Dalmuir
• Opened in 1904
• Sewage also dried and pressed
• Dumped at Sea off the tip of the Isle of Bute
• Site downstream allowed easier access for sewage ships
Shieldhall
Shieldhall
• Opened in 1910
• Also followed model at Dalmarnock
• Built as the main sewage works for Glasgow
• Rebuilt in 1980 to process sewage from surrounding areas
Shieldhall
Shieldhall
Constant Velocity Grit Channels
The whole of the presedimentation or inlet works is fully enclosed and
incorporates 6 large automatically raked mechanical screens followed by constant velocity grit channels which are cleaned by a travelling suction
dredger. Maximum flows through this section of the plant can be 6 DWF.
Shieldhall
Shieldhall
Primary Sedimentation
TanksA total of 12 rectangular primary
sedimentation tanks are installed, each of which has a travelling
mechanical scraper mechanism. The capacity of these tanks provides
a 6 hour retention at the DWF of 2.53m^3/sec.
Shieldhall
Shieldhall
Mammoth rotor Aeration Tanks
Secondary treatment of sewage flows is provided in an activated
sludge plant in the form of 6 rectangular aeration tanks which provide 5.5 hours retention at the
design DWF.
A total of 24 Biwater horizontal Mammoth rotors are installed in the
aeration tanks to provide the required oxygen transfer and mixing necessary for the efficient operation
of the process.
Daldowie
Daldowie
• In 2000, at a cost of £65million, Scottish Water had built a plant at Daldowie, near Glasgow, to process half of Scotland's sewage into fuel pellets. These are used as a coal substitute by the giant Longannet power station in Fife to produce enough "carbon-neutral" electricity to power 30,000 homes.