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Without it we are dead! Water is essential, but what processes must it go through to become fit for human consumption? This free course, Potable water treatment, will guide you through the continuous cycling of water between land, open water surfaces and the sea before moving on to an overview of the water treatment and supply process.
After studying this unit you should be able to:
- describe the operation and mechanisms of the hydrological cycle;
- list and describe the major physical, chemical and biological characteristics of clean fresh water, and explain their effects on aquatic organisms;
- explain the mode by which potable water is produced through the processes of screening, microstraining, aeration, coagulation and flocculation, sedimentation, flotation, filtration and disinfection;
- explain how the issues of nitrates, trace organics, fluoridation and plumbo-solvency can be dealt with in potable water supply;
- describe the main desalination processes used to produce potable water from saline or brackish sources;
- explain the function of transmission mains, ring mains, service reservoirs and water towers, and discuss the merits and disadvantages of different types of piping materials.
- Current section: Introduction
- Learning outcomes
- 1 Some facts about water
- 2 The hydrological cycle
- 3 The natural aquatic environment
- 3.1 Water, the medium of life
- 3.2 Dissolved oxygen
- 3.3 Physical characteristics of natural waters
- 3.4 Chemical characteristics of natural waters
- 3.5 Biological characteristics of natural waters
- 4.6 Tidal rivers and estuaries
- 4.7 Summary
- 5 Water treatment
- 5.1 Introduction
- 5.2 Preliminary treatment
- 5.3 Coagulation and flocculation
- 5.4 Sedimentation
- 5.5 Flotation
- 5.6 Filtration
- 5.7 Disinfection
- 5.8 Additional treatment
- 5.9 Membrane filtration
- 5.10 Fluoridation
- 5.11 Plumbo-solvency
- 5.12 Sludge treatment and disposal
- 5.13 Groundwater treatment
- 5.14 Desalination
- 5.15 Summary
- 6 Water supply
- Keep on learning
Study this free course
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Potable water treatment
This unit is from our archive and it is an adapted extract from Environmental Control and Public Health (T210) which is no longer in presentation. If you wish to study formally at The Open University, you may wish to explore the courses we offer in this
Without it we are dead! Water is essential, but what processes must it go through to become fit for human consumption? This unit will guide you through the continuous cycling of water between land, open water surfaces and the sea before moving on to an overview of the water treatment and supply process.
This unit is from our archive and is an adapted extract from Environmental control and public health (T210) which is no longer taught by The Open University. If you want to study formally with us, you may wish to explore other courses we offer in this subject area.
This free course includes adapted extracts from an Open University course which is no longer available to new students. If you found this interesting you could explore more free Technology courses or view the range of currently available OU Technology courses.
Copyright & revisions
Originally published: Friday, 29th July 2011
Last updated on: Wednesday, 10th October 2012
- Creative-Commons: The Open University is proud to release this free course under a Creative Commons licence. However, any third-party materials featured within it are used with permission and are not ours to give away. These materials are not subject to the Creative Commons licence. See terms and conditions. Full details can be found in the Acknowledgements and our FAQs section.
- This site has Copy Reuse Tracking enabled - see our FAQs for more information.
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