Introduction

It is essential that the industrial ventilating engineer have a basic under­standing of the properties of water and its treatment. This is to ensure an efficiently running and trouble-free plant. Additional to these issues are the problems relating to the discharge of contaminated water to the surround­ing environment.

Water treatment over the past 100 years has grown into a complex science. It is of interest to note that in the 1880s a steamship left the port of Liverpool in the UK with instructions that the boiler water was to be treated with a mixture of cow dung and peat. A short time after leaving Liverpool, the ship’s boiler ex­ploded and the ship sank. It was not reported whether the explosion was due to the unusual method of water treatment.

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