Can the sewage treated by the small air flotation machine be drinkable?
With the continuous development of small air flotation machines, the utilization rate in the market is also getting higher and higher, and many people will have doubts about whether the water source can be drinkable after the water treatment of the small air flotation machine. Just tell everyone
Of course, we still mainly look at whether the water meets the drinking water hygiene standards. If the water meets the drinking water standards, even the treated fecal water is still drinkable.
Sewage treatment can be divided into primary, secondary and tertiary treatment according to the degree of treatment.
Primary treatment belongs to physical treatment, which mainly removes suspended solid pollutants in sewage. Most of the physical treatment methods can only meet the requirements of primary treatment. After primary treatment of sewage, BOD can generally be removed by about 30%, which does not meet the discharge standard. The primary treatment belongs to the preprocessing of the secondary treatment. Such as the company's pollution blocking equipment, mechanical grid decontamination machine, shaftless screw conveyor, rotary bell type sand removal machine.
The secondary small air flotation machine mainly removes the organic pollutants (BOD, COD substances) in the colloidal and dissolved state in the sewage, and the removal rate can reach more than 90%, so that the organic pollutants can meet the discharge standard. The company's air flotation equipment, buried integrated sewage treatment equipment, slaughter sewage treatment equipment, hospital sewage treatment equipment, etc. can meet the discharge standard of sewage quality.
The tertiary treatment further treats refractory organic matter, nitrogen and phosphorus and other soluble inorganic matter that can lead to eutrophication of water bodies. The main methods are biological denitrification and phosphorus removal, coagulation sedimentation, sand filtration, activated carbon adsorption, ion exchange and electroosmotic analysis.
Water in nature is cyclic. The more seriously polluted the water, the more difficult and expensive it will be to treat the water. As far as the current technology is concerned, in fact, any sewage can be converted into pure water, but the cost is astonishingly high, and the current economic level is still not allowed.
The sewage treated by the small air flotation machine is generally only discharged up to the standard, but it is very different from our drinking water. The treated sewage still contains many substances that are not suitable for the human body. It is difficult for the advanced treated water to meet the drinking water index. . The effluent of the sewage treatment plant is only secondary treatment, and the real drinkable water is the tertiary treated effluent of the waterworks.
