Method using coagulation air floatation machine to treat sewage

Abstract

The invention provides a method using a coagulation air floatation machine to treat sewage. The method includes: the filtered and flocculently precipitated sewage is guided into the coagulation air floatation machine, and coagulant is added; the motor of the coagulation air floatation machine drives blades to rotate through a rotary shaft so as to allow the coagulant to have mixed reaction with the impurities in the sewage to form floc; an ultrasonic transmitter cavitates air entering the coagulation air floatation machine through an air inlet pipe to generate fine bubbles; the fine bubbles floats and adheres and carries away the floc during floatation; the floc floats to the water surface along with the fine bubbles and forms floating residues, the floating residues are removed, and the water treated by the fine bubbles is discharged from the water outlet in the bottom of the coagulation air floatation machine. The method has the advantages that the water treatment method is simple, low in cost and capable of effectively removing the impurities such as suspended particles, emulsified oil, fibers and heavy metal in the sewage, environmentally friendly, free of pollution and high in market application value.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for treating sewage by using a coagulation air flotation machine. Background technique [0002] With the influx of a large number of rural population into cities in our country, the urban population continues to increase, and the urban water resources have been severely damaged. Our country is facing the problem of water resource depletion. Water resources are the guarantee for human survival. It is a non-renewable resource. It not only affects people's production and life, but also has an important impact on my country's national conditions and national destiny. It can be seen that it is urgent to strengthen the urban sewage treatment work in our country. [0003] Urban sewage is mainly domestic sewage, industrial wastewater, etc. discharged in the city. These wastewater are mainly collected through the urban sewage pipe network or discharged into the water body after b...

AI Technical Summary

Problems solved by technology

However, the process of urbanization in our country has caused serious problems of water resource pollution, which is contrary to the principle of sustainable development that our country has always advocated. Our country must find ways to solve the problem of urban water pollution

[0005] On the other hand, during the treatment process of the sewage treatment plant, the sewage first flows into the coarse grid, and after the larger floating debris is removed through the coarse grid, then the sewage is removed through the fine grid to remove the fine floating debris, and then in the swirling flow. The sediment is removed in the grit chamber, and the sediment deposited at the bottom of the grit chamber is discharged into the sludge storage tank through the sand suction machine; the sewage after sand removal enters the coagulation sedimentation tank of the back-end treatment facilities and equipment, such as the coagulation sedimentation tank It mainly removes suspended solid particles in sewage, and the floc particles formed by coagulation are small, light in weight and poor in sedimentation performance. This sewage treatment has brought great challenges

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