Improved sewage treatment system

Abstract

The invention designs an improved sewage treatment system. The improved sewage treatment system comprises a biological contact oxidation pond, a sedimentation pond, a multi-stage baffling bent pipe and a disinfection pond; a gill-type aerator for decomposing sewage and providing oxygen is arranged in the biological contact oxidation pond; the sedimentation pond is used for removing suspended matters; the multi-stage baffling bent pipe is used for ensuring that a liquid chemical and sewage are fully mixed; and the disinfection pond is used for carrying out plug flow and sterilization on the liquid chemical and the sewage. In the improved sewage treatment system disclosed by the invention, the biological contact oxidation pond is high in oxygenation efficiency and strong in impact load resistance; the multi-stage baffling bent pipe is additionally arranged on a water inlet pipeline of the disinfection pond; a dosing point is arranged at the front end of the bent pipe; the disinfectant and sewage are uniformly mixed under the baffling collision effect of the 10-15-stage right-angle bent pipe, and therefore, sterilization and disinfection effects are good, and it is guaranteed that effluent quality stably reaches standards.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an improved sewage treatment system. Background technique [0002] The source and composition of hospital sewage are complex, and the composition and volume of sewage discharged by different departments and departments are also different. In addition to containing a large number of pathogens such as bacteria, viruses, and insect eggs, hospital sewage also contains chemicals, heavy metals, disinfectants, organic solvents, acids, alkalis, and radioactive isotopes. [0003] At present, the hospital sewage treatment system commonly used in the world is pretreatment + biological contact oxidation + disinfection treatment. Pre-treatment mainly removes solid impurities in sewage and homogenizes water quality through septic tanks, regulating tanks and other devices. [0004] The biological contact oxidation process is a treatment system that uses the metabolism of microorganis...

AI Technical Summary

Problems solved by technology

At present, rubber membrane disc or tube microporous aerators are commonly used as aeration equipment. The main disadvantage is that the oxygenation efficiency is low, resulting in weak impact load resistance. When the water volume or water quality changes greatly, it is easy to cause the discharge to fail to meet the standard.

[0005] Disinfection treatment is mainly to sterilize and disinfect the treated sewage by adding disinfectants to avoid the outflow of pathogens. The main disadvantage of the current disinfection of medicines is that the medicine solution and sewage are not mixed uniformly, which leads to insufficient sterilization of some sewage and affects the quality of effluent water.

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