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The function of roots blower in sewage treatment

The purpose of the aeration roots blower for sewage treatment is to make the sufficient dissolved oxygen water in the water body contact with the gas, and carry out the process of dissolving oxygen and removing the dissolved gas and volatile substances in the water.


In the wastewater activated sludge process, the dissolved oxygen in the mixed liquor is replenished by aeration. The function of Roots blower for sewage treatment is mainly to provide sufficient dissolved oxygen for aerobic bacteria in the water body and provide power for mixing the mixed liquid in the aeration tank. It is widely used in the aeration treatment of industrial wastewater such as papermaking, textile, printing and dyeing, electroplating, viscose fiber, food processing, fermentation and brewing and urban domestic sewage.


The aeration methods used in the activated sludge aeration tank are divided into bubble aeration method and mechanical aeration method. In the process of wastewater biological treatment by isoline bubble aeration method, bubble aeration method and activated sludge method, microporous aeration head, rotary cutting aeration head or microporous aeration pipe are set at the bottom or adjacent bottom of the aeration tank.


Because the diffuser generating microbubbles has a large immersion depth, the pore resistance of the diffuser increases. Therefore, the required pressure of the roots blower is large. Its oxygen charging efficiency is usually 10% ~ 30%.


Mechanical aeration refers to the method of fully mixing the wastewater and sludge in the activated sludge aeration tank in the mechanical equipment, constantly updating the liquid level of the mixed liquid to contact with the air, and increasing the dissolved oxygen in the water.


Through the mechanical action of blades, impellers, sprayers or turbine devices, oxygen in the atmosphere enters the liquid. At present, the widely used aerators mainly include surface aerators and submerged turbine aerators. The roots blower for sewage treatment is still very useful.



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