Domestic sewage treatment method by intermittent aeration contact oxidation process

A technology for domestic sewage and contact oxidation tank, which is applied in aerobic and anaerobic process treatment, water/sewage treatment, chemical instruments and methods, etc. High requirements, etc., to achieve the effect of low consumption of chemicals, stable treatment effect, and fewer structures and equipment

Inactive Publication Date: 2005-03-16
戴双建
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, it also has many disadvantages: (1) high requirements for automatic control; (2) special drainage equipment (decanter) is required due to the short drainage time and the requirement not to stir the sedimentation sludge layer during intermittent drainage. , and the decanter is very demanding; (3) The post-processing equipment is huge: if the disinfection equipment is very large, the volume of the contact tank is also large, and the drainage facilities and drainage pipes are also large; (4) The decanting depth is generally 1- 2m, this part of head loss is wasted and increases the total head
[0004] While the traditional A / O method, A 2 The / O method is difficult to further improve due to the large amount of reflux water and the limited effect of nitrogen and phosphorus removal.

Method used

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  • Domestic sewage treatment method by intermittent aeration contact oxidation process
  • Domestic sewage treatment method by intermittent aeration contact oxidation process
  • Domestic sewage treatment method by intermittent aeration contact oxidation process

Examples

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example 1

[0026] The domestic sewage water volume of a hotel is 300 tons / day (12.5 tons / hour), and the sewage water quality is CODcr=339.4mg / L, BOD 5 =207.3mg / L, TP=4.16mg / L, NH 3 -N=45.3mg / L. According to the above process method to build a sewage treatment facility, the hydraulic retention time is designed as:

[0027] The grid adjustment pool is 8 hours, with a net volume of 100 cubic meters;

[0028] The anaerobic pool lasts for 2 hours, with a net volume of 25 cubic meters;

[0029] The intermittent aeration contact oxidation tank lasts for 6 hours, with a net volume of 75 cubic meters and a small amount of polymerization at the end

[0030] Aluminum chloride or ferrous sulfate for phosphorus removal;

[0031] The sedimentation tank lasts for 2.5 hours, with a net volume of 31.3 cubic meters.

[0032] Then the total hydraulic retention time is 18.5 hours, and the total volume is 232 cubic meters.

[0033] Water quality after treatment:

[0034] CODcr=23.0mg / L,BOD 5 =9.1mg / L...

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Abstract

The invention provides a domestic sewage treatment device and method by intermittent aeration contact oxidation process, wherein the device comprises a regulating reservoir (or water collecting tank), an naerobic pool, an intermittent aeration contact oxidation pool, a deposition pool and pipe-lines, water pumps for connecting these pools, a bagger is arranged on the extremity end of the intermittent aeration contact oxidation pool. The intermittent aeration contact oxidation pool can be charged with agents on the tail end as required, the sludge in the bagger returns to the anaerobic pool for treatment.

Description

technical field [0001] The intermittent aeration contact oxidation method of the present invention is used to treat domestic sewage, and relates to a treatment method and facilities for domestic sewage. It is composed of pipelines, water pumps and other supporting equipment. There are fillers in the intermittent aeration contact oxidation tank, and the tank type adopts a plug-flow design with a mud bucket at the end. From the adjustment tank to the anaerobic tank, there is 90% of the normal treatment water inflow, from the adjustment tank to the intermittent aeration contact oxidation tank, there is 10% of the normal treatment water volume, and the end of the intermittent aeration contact oxidation tank can be selectively added. , and part of the mud hopper sludge is returned to the anaerobic tank. [0002] This method has excellent phosphorus and nitrogen removal functions, and the effluent water quality is stable, and it can also meet the reuse standard according to the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F3/30
Inventor 戴双建
Owner 戴双建
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