Rotational flow type active sludge sewage treatment device

Abstract

The invention relates to a rotational flow type active sludge sewage treatment device, which comprises a cylindrical shell and a venturi, wherein the inlet of a gradually-reducing part of the venturi is connected with a high-pressure pump, the throat part is connected with an air inlet pipe communicated with the atmosphere, the outlet of a gradually-expanding part is provided with a jet pipe extending forwards, and the jet pipe is connected with the bottom of the cylindrical shell tangentially. The air inlet pipe is provided with a one-way valve and an adjusting valve, the height position of the jet pipe on the venturi connected into the cylindrical shell is 10 to 20 percent of the height of the inner space of the shell, and the shell is provided with a sludge backflow pipe interface of which the structure ensures that the connection mode between a sewage backflow pipe and the shell is tangential connection and the direction accords with the tangential direction of the jet pipe so as to comply with the rotational flow direction of the sewage in the shell. The rotational flow type active sludge sewage treatment device has the advantages of simple structure, convenient operation and good adaptability, greatly improves the oxygen content in the sewage, enhances the contact opportunities among microorganisms in water pollutants and sludge, is advantageous for improving the sludge concentration and improving the purification effect of the sewage, and is mainly adapted to sewage treatment.

Description

technical field [0001] The invention relates to a sewage treatment system, in particular to an integrated sewage treatment system based on an activated sludge tank combined with various treatment methods, belonging to the field of environmental protection. Background technique [0002] Since 1804, the British first used sedimentation and filtration technology as a centralized water treatment plant. In 1884, the Americans invented the coagulation, sedimentation, filtration, and chlorine disinfection technology, which has been used for 120 years. There are new discoveries and improvements in treatment, but the treatment process of domestic water basically remains the same, essentially no update and breakthrough. However, the water source to be treated has undergone great changes: the water source a hundred years ago was not polluted due to the underdevelopment of industry and agriculture. Over the past few decades, the development of modern industry, especially the sudden and...

AI Technical Summary

Problems solved by technology

These two aerobic methods have their own advantages and disadvantages, and both have a long history of development. Generally speaking, the former has a better effect on the removal of organic pollutants and requires lower capital investment, but the operation is more complicated and more It is used in the occasion of large water volume: the latter is more suitable for the impact load caused by the change of water quality and water volume, and the operation is relatively simple, so it is more used in the treatment of small water volume or slightly polluted water

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