Overview of Dissolved Oxygen
and Natural Purification
Through photosynthesis, plant life produces
a significant amount of oxygen.
The process of respiration removes oxygen
Oxygen entering the water through contact
with the atmosphere is reaeration.
Dissolved Oxygen --DO -- levels determine
the amount of life a water system can sustain.
Temperature, light turbidity, color, salinity,
turbulence decomposition and organisms all affect DO.
Waste discharge causes decomposers to multiply
and consume more oxygen.
The ability of a body of water to handle wastewater
depends on volume and strength of the waste, flow, climate, temperature
and other factors.
Downstream of a discharge there is a recovery
zone where species that are more disease tolerant exist.