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An Improved Method for Urban Sewage Treatment

A sewage treatment method and urban sewage technology, which is applied in the field of improved urban sewage treatment, can solve the problems of low removal rate, increased floor area, power consumption, investment cost, and operation cost, and achieve high-efficiency denitrification and phosphorus removal capabilities, discharge The effect of good water quality and reduced renovation cost

Active Publication Date: 2018-08-10
青海洁神环境科技股份有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0009] The present invention aims to provide an improved method of urban sewage treatment to solve the problem that the removal rate of nitrogen in the oxidation ditch process in the prior art is not high when the temperature is below 12°C, and solar heating, geothermal pump heat preservation measures and other methods are used in northern winter Improve the denitrification capacity, but increase the technical problems of land occupation, power consumption, investment cost and operating cost

Method used

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  • An Improved Method for Urban Sewage Treatment
  • An Improved Method for Urban Sewage Treatment
  • An Improved Method for Urban Sewage Treatment

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Embodiment approach

[0027] Correspondingly, according to a typical implementation of the present invention, it mainly includes the following steps: sewage passing through municipal pipeline network → coarse grid well → sewage lifting pump well → fine grid well → grit tank → anaerobic zone → mixed water distribution zone (Three-dimensional rotating mesh contact body) → biochemical zone → secondary sedimentation tank → disinfection system → metering tank discharge.

[0028] According to a typical implementation of the present invention, in the process of using the BBR process (Bacillus) to transform the oxidation ditch process, the anoxic zone in the oxidation ditch process is transformed into a mixed water distribution zone, and only the anoxic zone in the oxidation ditch process A three-dimensional rotating mesh contact body is added to the mesh contact body, which can be directly suspended into the pool by a load-bearing beam built above the hypoxic zone. The sludge return in the secondary settling...

Embodiment 1

[0042] In the method for treating urban sewage of the present invention, the microorganisms include Bacillus microorganisms including Bacillus subtilis, Bacillus licheniformis, Bacillus cereus, Bacillus thuringiensis, Bacillus megaterium, Bacillus polymyxa, and amylolytic Bacillus and Bacillus pumilus, etc. The specific process is as figure 2 As shown, it mainly includes the following steps:

[0043] The first step: the domestic sewage enters the coarse grid well through the municipal pipe network to remove large-volume pollutants, the coarse grid mesh is 25-100mm;

[0044] Step 2: The effluent from the coarse grid well flows into the sewage lift pump well, and then is lifted from the sewage lift pump well to the fine grid well by the lift pump. The fine grid will intercept impurities and large particles in the water. The fine grid mesh is 1.5 ~25mm;

[0045] The third step: the water from the fine grid well flows into the grit chamber, which settles the sediment in the water;

[0...

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Abstract

The invention discloses an improved method for treating urban sewage. The method is a sewage treatment method improved on the basis of an oxidation ditch process, and comprises the following steps: reconstructing an anoxic zone in the oxidization ditch process into a mixed water distribution zone, wherein a BBR contact body device is arranged in the mixed water distribution zone; and reconstructing an aerobic zone into a biochemical zone, wherein a flora with bacillus microorganisms as a dominant strain exists in the biochemical zone. By applying the technical scheme of the invention, the method can achieve the following beneficial effects: (1) efficient denitrification and dephosphorization capacities; (2) no need of an additional deodorizing system; (3) great reduction of the reconstruction cost; (4) energy conservation, and no need of new occupied land; and (5) good discharged water quality. The municipal sewage treated by the method disclosed by the invention can reach a first-class standard A of 'pollutant discharge standards for urban sewage treatment plants'.

Description

Technical field [0001] The invention relates to the technical field of sewage treatment, and in particular to an improved method for urban sewage treatment. Background technique [0002] Urban domestic sewage mainly comes from households, businesses and urban public facilities. Organic matter is the main pollutant of domestic sewage, such as starch, protein, sugar and mineral oil. The chemical oxygen demand, biological oxygen demand, total nitrogen and total phosphorus of urban domestic sewage are relatively high. When water with high nitrogen and phosphorus content is discharged into nature, it is easy to cause eutrophication of the water body, causing large numbers of algae to grow and multiply, resulting in deterioration of water quality, pollution of the environment, and even red tides and blooms in severe cases. [0003] For domestic sewage, biological methods are mainly used for treatment at home and abroad. Biological methods mainly include activated sludge method and bio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCY02W10/37
Inventor 柴建中柴伟贺王伟伟纳守军
Owner 青海洁神环境科技股份有限公司
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