Sewage and wastewater treatment device based on cyclic biological treatment

Abstract

The invention provides a sewage and wastewater treatment device based on cyclic biological treatment and belongs to the technical field of wastewater treatment devices. According to the sewage and wastewater treatment device, oil components difficult to decompose generated during sewage treatment are separated in advance in a flow regulating tank, the reproduction of denitrifying microorganisms is induced according to soil activation combined with a first CBT reaction tank, and meanwhile, the soil containing excessive phosphorus is conveyed at the bubbling stage of a second CBT reaction tank, and therefore, nitrogen and phosphorus also can be removed evenly in an environment in which the ratio of organic matters to nitrogen in sewage or wastewater is relatively low. The first CBT reaction tank is differentiated and mounted, the survival time and the activity time of the microorganisms are shortened by use of activated soil in the second CBT reaction tank, the hydraulic stay time is reduced, automatic operation can be realized under a bad air condition and a good air condition during air supply by use of a tube diffuser connected with a vortex wheel pump, the organic matters and the phosphorus are removed to prevent sludge expansion, and the pressure caused by the microorganisms is minimized.

Description

technical field [0001] The invention relates to a sewer and waste water treatment device according to cyclic biological treatment (Cyclic Biological Treatment-CBT), belonging to the technical field of sewer and waste water treatment devices. Background technique [0002] Due to the rapid development of industry and the increase of population, environmental pollution, especially water pollution, is very serious. The inflow of nutrient salts nitrogen and phosphorus, which are the main pollution sources of rivers and lakes, has been increasing, and tap water sources have been polluted. [0003] In the past, most sewage treatment plants used the standard activated soil method to treat sewage and wastewater. The standard activated soil method is difficult to treat when the compound changes are large, and the efficiency is low when removing nutrients such as nitrogen (N) and phosphorus (P) in organic sewage and wastewater. In order to improve the removal efficiency of organic po...

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Problems solved by technology

[0006] The prior art described above is an SBR water treatment device suitable for medium-sized or large-scale water treatment, and is not suitable for water treatment facilities where the inflow of sewage, waste water, or sewage is small or the inflow changes little. The active soil in the water also flows out, which may cause water pollution. For this reason, certain devices must be installed, and there will still be financial problems in the maintenance of the facilities.

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