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A method for urban sewage treatment

A sewage treatment method, a technology of urban sewage, applied in the field of sewage treatment, can solve the problems of low removal rate, increase of floor area, power consumption, investment cost and operation cost, etc., achieve high-efficiency denitrification and phosphorus removal capabilities, and reduce transformation costs Effect

Active Publication Date: 2018-08-14
青海洁神环境科技股份有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] The present invention aims at providing a kind of method of municipal sewage treatment, to solve the problem of A in the prior art 2 The nitrogen removal rate of the O process is not high when the temperature is below 12°C. In the northern winter, solar heating, geothermal pump insulation measures and other methods are used to improve the denitrification capacity, but the technology increases the area occupied, power consumption, investment cost and operating cost. question

Method used

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  • A method for urban sewage treatment
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  • A method for urban sewage treatment

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Embodiment approach

[0025] In fact, the technical scheme of the present invention is a kind of utilization BBR process (bacillus) to transform A 2 A new method of urban sewage treatment by O process. Among them, A 2 O technology belongs to prior art (concrete technological process sees figure 1 ), including traditional A 2 O process and improved A 2 O craft. According to a typical implementation of the present invention, it mainly includes the following steps: the sewage passes through the municipal pipe network → the coarse grid well → the sewage lifting pump well → the fine grid well → the grit chamber → the anaerobic tank → the mixing tank → the biochemical tank → Secondary sedimentation tank→disinfection system→discharge from metering tank.

[0026] According to a typical embodiment of the present invention, after utilizing BBR process (bacillus) to transform A 2 During the O process, the A 2 The anoxic pool in the O process is transformed into a mixed water distribution pool, and the ...

Embodiment 1

[0041] In the method for urban sewage treatment of the present invention, microorganisms include Bacillus (Bacillus bacterium) microorganisms including Bacillus subtilis, Bacillus licheniformis, Bacillus cereus, Bacillus thuringiensis, Bacillus megaterium, Bacillus polymyxa, amyloliquefaciens Bacillus and Bacillus pumilus, etc., the process is specifically as follows figure 2 As shown, it mainly includes the following steps:

[0042] The first step: domestic sewage enters the coarse grid well through the municipal pipe network to remove large volumes of pollutants, and the coarse grid mesh is 25-100mm;

[0043] Step 2: The water 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 through the lift pump. The fine grid will intercept impurities and large particles in the water, and the fine grid mesh is 1.5 ~25mm;

[0044] Step 3: The water from the fine grid well flows into the grit chamber, a...

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Abstract

The invention discloses a municipal sewage treatment method. The sewage treatment method is an improvement based on an A2O process and comprises the following steps: reconstructing an anoxic tank in the A2O process into a mixed water distribution tank, wherein a BBR contact body device is arranged in the mixed water distribution tank; and reconstructing an aerobic tank into a biochemical tank, wherein a flora using Bacillus as the dominant strain is arranged in the biochemical tank. The technical scheme disclosed by the invention has the advantages of high denitrification and dephosphorization capacity, energy saving, no need of newly increased land and high quality of discharged water, does not need any additional deodorizing system, greatly lowers the reconstruction cost, and can implement grade enhancement and capacity-expansion reconstruction without shutting down the sewage plant. The municipal sewage treated by the method can achieve Grade 1A in Municipal Sewage Treatment Plant Pollutant Discharge Standard.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for urban sewage treatment. Background technique [0002] Urban domestic sewage mainly comes from households, businesses and urban public facilities, etc. Organic matter is the main pollutant of domestic sewage, such as: starch, protein, sugar and vegetable 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 the natural world, it will easily cause eutrophication of the water body, causing algae to grow and reproduce in large numbers, and in severe cases, it will cause red tides and algal blooms, which will deteriorate the water quality and pollute the environment. The main pollutants in urban domestic sewage are organic matter. For domestic sewage, biological methods are mainly used for treatment at ho...

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
Owner 青海洁神环境科技股份有限公司
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