The molecular oxygen in the air dissolved in the water is called dissolved oxygen. Fish friends will be put into the water to increase the pump, is to increase the concentration of dissolved oxygen in the water, to better ensure the survival of fish, then in the sewage industry, dissolved oxygen and what is the importance of it?
First of all, dissolved oxygen will directly affect the water quality. When the water body is contaminated by organic matter, oxygen consumption is serious, dissolved oxygen can not be timely replenishment, the anaerobic bacteria in the water body will soon multiply, organic matter due to corruption and make the water body black, odor. Simply put, high dissolved oxygen is conducive to the degradation of most of the organic pollutants in the water body, so that the water body can be purified faster. On the contrary, dissolved oxygen is low, the degradation of pollutants in the water body is slow.
Secondly, the activated sludge concentration is higher load is also higher when the demand for dissolved oxygen is higher, but also to control in a reasonable range, not excessive aeration, otherwise the activated sludge is easy to aging, on the second sedimentation tank is not conducive to the water.
Finally, dissolved oxygen is an important medium for degradation and detection of BOD. Sewage treatment in the degradation of BOD, dissolved oxygen is an indispensable medium, through the consumption of dissolved oxygen to detect the BOD content of sewage.