- Current section: Introduction
- Learning outcomes
- 1 Some facts about water
- 2 The hydrological cycle
- 3 The natural aquatic environment
- 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
- References
- Acknowledgements
from The Open University
Alternatively you can skip the navigation by pressing 'Enter'.
Potable water treatment
Without it we are dead! Water is essential, but what processes must...
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.
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.
- Duration: 20 hours
- Published on: Friday 29th July 2011
- Level: Introductory
- Posted under: Technology
Contents
Potable water treatment
Introduction

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 curriculum area. [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)]
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.
Archive content
This is an extract from an Open University course which is no longer available to new students. If you found this interesting you could explore more free Technology course units or view the range of currently available OU Technology courses.
Other pages You might like

Try: Water supply and treatment in the UK
Have you thought about the journey water makes to get to your taps? What processes has it...

Try: Structural devices
Microelectronics has enabled designers of integrated circuits to exercise complete...

Study: Postgraduate Diploma in Management and...
This diploma provides an analytical view of strategic issues in technology management,...

Try: Digital Nepal
Nepal is one of the poorest countries in the world, so just how has it managed to develop...

Try: Finding information in information...
The internet provides a world of information, but how do you find what you are looking...

Study: Digital audio
This ten-week online course will develop your ability to create and share digital audio...

Try: Digital Film School
Have you ever wanted to pick up a video camera and make a short video or film, but felt...

Try: Finding information in technology
The internet provides a world of information, but how do you find what you are looking...

Study: Postgraduate Diploma in Information...
This diploma provides an analytical view of strategic issues in technology management,...

Try: Using and managing waste
Do you know what happens to the things you throw away? Sustainable management of...

Try: Transport and sustainability
This unit explores the issues around sustainable transport and how the role of technology...

Study: Technologies in practice
Study three tasters in computing and IT, networking, Linux and robotics, to develop the...
Comments
Be the first to post a comment
Copyright & revisions
Copyright information
- 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 section.
Feeds
If you enjoyed this, why not follow a feed to find out when we have new things like it? Choose an RSS feed from the list below. (Don't know what to do with RSS feeds?)
Remember, you can also make your own, personal feed by combining tags from around OpenLearn.
Alternative Formats
Tags, Ratings and Social Bookmarking
Page Tags
Sign in or create a free account to add tags to your personal tag cloud using:
Have you tried our free courses?
Back on the streets
More Or Less returns
OU TV & Radio
-
More Or LessBBC Radio 4
Sunday 20:00 -
Thinking Allowed: Plenty & stammeringBBC Radio 4
Monday 0:15 -
Bang Goes The Theory s6e5Eden
Monday 9:00 -
Bang Goes The Theory s6e6Eden
Monday 9:30 -
Bang Goes The Theory s6e6Eden
Monday 9:30
Views
Votes
Comments
Tags
- climate change (373)
- business (277)
- diaries (194)
- bottom line (169)
- food (168)
- Rough Science (162)
- internet (147)
- BBC Two (145)
- BBC Radio 4 (140)
- BBC (133)
- Scotland (121)
- points for debate (120)
- listings (120)
- Creative Climate (116)
- children (116)
- Bang goes the Theory (116)
- English Civil War (115)
- astronomy (108)
- Thinking Allowed (104)
- religion (98)
- marketing (94)
- 20th century (94)
- Charles I (93)
- evolution (92)
- communication (92)
- research (89)
- sustainability (89)
- architecture (86)
- energy (83)
- Charles Darwin (78)
OpenLearn Links
Copyrighted imageCredit: Background image Lucian Milasan | Dreamstime.com 

