Wastewater treatment plant:
Grid - sand sedimentation - primary sedimentation - biochemical - secondary sedimentation - discharge
Industrial wastewater:
Conditioning - reaction - precipitation - callback - discharge
With the accelerated process of urbanization, urban water pollution is becoming more and more serious, indiscriminate discharges, excessive discharge and other issues seriously affect the protection of water resources. Wastewater treatment plant as an important part of urban water treatment, water recycling and water environmental protection plays a vital role, this article lists the detailed water treatment process of wastewater treatment plant for your reference.
Let's take a brief look at the typical process of urban sewage treatment plant.
Modern sewage treatment technology, according to its principle of action can be divided into physical sewage treatment, chemical sewage treatment and biological sewage treatment method of three categories.
1 physical sewage treatment method
The use of physical separation of sewage in the main suspended state of pollutants, the chemical nature of pollutants in the treatment process does not change.
Mainly: the use of pollutants and water density differences by gravity settling effect from the water separation of sedimentation, the use of screening media to intercept the suspended sewage filtering method; the use of air-float treatment equipment in the sewage formed by tiny bubbles upward will be close to the density of the water of tiny particles of pollutants to be removed from the adherence of the air-float method; the use of reverse osmosis membranes to retain pollutants reverse osmosis method.
Grid:
Grid is made of a set of parallel metal grating metal frame, slanting in the wastewater flow through the channel, or pumping station catchment basin inlet, to block large suspended or floating solid pollutants, so as not to clog the pumps and sedimentation tanks of the sludge discharge pipe. The retention effect depends on the gap width and the nature of the water.