THE Aeration Apparatus (Model: TR 06) has been designed for students experiments to study the
transfer of oxygen from the atmosphere into a body of water. This process is one of the most important
processes in public health engineering. It occurs both naturally, e.g. in the surface re-aeration
of a polluted river, and under imposed conditions, as in the activated sludge process. The reverse process
also occurs, e.g. the loss of oxygen to atmosphere from water supersaturated as a result of photosynthesis,
or the release of carbon dioxide or hydrogen sulphide from a groundwater on exposure to the atmosphere.



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