- 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
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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.
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