The amount of dissolved oxygen is a measure of the biological activity
of the water masses. Phytoplankton and macroalgae present in the water
mass produce oxygen by way of photosynthesis.
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Dissolved Oxygen, usually abbreviated to simply
'D.O.', is widely used in water quality studies and routine operation
of water reclamation facilities.
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Tests, test kits, electronic and optical sensors can all be used
top determine the concentration of dissolved oxygen.
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