Method and device for efficiently denitriding and dephosphorizing underground percolation sewage

A technology of sewage treatment device and sewage treatment method, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., which can solve the problems of unguaranteed oxygen supply, low removal rate, and low oxygen supply intensity To achieve the effect of reducing pollutant load, ensuring denitrification ability, and enhancing anti-blocking ability

Active Publication Date: 2013-05-29
广州中科碧疆环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are the following problems: (1) the sewage distributes water on the top surface of the percolation layer, emits odor, the landscape effect is poor, it is easy to breed mosquitoes and is greatly affected by the climate; (2) its oxygen supply only depends on the atmosphere to the percolation layer The air inhaled due to the vertical diffusion of the vertical diffusion and the change of the influent flow rate has a low oxygen supply intensity, and the oxygen supply cannot be guaranteed when the pollutant load is large; (3) The phosphorus removal effect needs to be improved
But the above-mentioned invention also has the following defects: (1) strong dependence on pretreatment; (2) no special anaerobic unit is set, and the denitrification capacity of the system is weak, resulting in low removal rate of TN (total nitrogen) (3) The long-term removal effect of TP (total phosphorus) needs to be improved
[0004] To sum up, with the improvement of domestic sewage treatment standards in the country, the existing sewage treatment technology can no longer meet the needs of our country. Therefore, the effect of nitrogen and phosphorus removal is good, the land occupation is small, the landscape effect is good, and the construction and operation costs are low. The decentralized and efficient domestic sewage treatment technology is urgently needed in my country

Method used

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  • Method and device for efficiently denitriding and dephosphorizing underground percolation sewage
  • Method and device for efficiently denitriding and dephosphorizing underground percolation sewage

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Embodiment 1

[0030] figure 1 As shown, after the raw sewage (domestic sewage) is pretreated by the grid tank 1, the anaerobic sedimentation tank 2 and the adjustment tank 3, it can enter the underground infiltration sewage treatment through the upper water distribution pipe, the water distribution-ventilation pipe and the lower water distribution pipe. Device 4 is used for sewage treatment. The grill pool 1 is used to remove leaves, plastic bags and other garbage in the raw sewage. Anaerobic sedimentation tank 2 is used for oil separation and removal of suspended particles. The regulating tank 3 is used to divide the raw sewage in proportion and discharge it in a fixed and quantitative manner.

[0031] figure 2 An underground percolation sewage treatment device for efficient denitrification and dephosphorization is shown, including an infiltration area A and an infiltration area B. Among them, the infiltration zone A consists of the covering layer 11, the upper water-dispersing layer ...

Embodiment 2

[0039] figure 2 An underground percolation sewage treatment device for efficient denitrification and dephosphorization is shown, including an infiltration area A and an infiltration area B. Among them, the infiltration zone A consists of the covering layer 11, the upper water-dispersing layer 12, the upper fine-filtering layer 14, the upper fine-filtering layer 15, the water-dispersing-ventilating layer 16, the middle fine-filtering layer 18, the middle fine-filtering layer 19, and the lower layer from top to bottom. The water-dispersing layer 20, the lower coarse filter layer 22 and the diversion layer 23 are composed; the infiltration zone B is composed of the diversion layer 23, the phosphorus removal layer 24 and the vegetation layer 25 from bottom to top. The infiltration zone A and the infiltration zone B communicate through the bottom flow guide layer 23 . The total filling height of the infiltration area A is 2.0m, and the total filling height of the infiltration are...

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Abstract

The invention relates to a method for efficiently denitriding and dephosphorizing underground percolation sewage. The method comprises the following steps of: treating raw sewage in a downward infiltration region in the infiltration process; treating the sewage in an upward infiltration region in the upward infiltration process; and draining, wherein raw sewage is fed into the downward infiltration region in multiple upper and lower layers for performing multilayer combined water scattering, and raw sewage entering from a bottommost layer is used for providing a carbon source for a denitrification reaction. The invention further relates to a device for implementing the method. The device comprises a downward infiltration region and an upward infiltration region, wherein the downward infiltration region consists of a covering layer, an upper water scattering layer, an upper fine filtering layer, an upper precision filtering layer, a water scattering-ventilating layer, a middle fine filtering layer, a middle precision filtering layer, a lower water scattering layer, a lower rough filtering layer and a diversion layer in sequence from top to bottom; the downward infiltration region consists of a diversion layer, a dephosphorizing layer and a vegetable layer; and the downward infiltration region and the upward infiltration region are communicated with each other at the bottom diversion layer. The method and the device have the advantages of simple structure, low construction cost, no need of special maintenance, low running cost and good sewage treatment effect, and are suitable for treating domestic sewage.

Description

technical field [0001] The invention relates to an underground percolation sewage treatment method and device for efficient denitrification and phosphorus removal. The pollutants in domestic sewage are removed in different functional units by building different functional areas, and belong to the technical field of environmental protection. Background technique [0002] With the rapid economic growth of our country and the continuous improvement of urbanization level, the problem of water pollution is becoming more and more serious. According to the water quality monitoring results conducted by the water conservancy department on nearly 700 large and medium-sized rivers across the country, 50% of the river sections are polluted, and 10% of the river sections are seriously polluted. The environmental conditions of the main lakes are also not optimistic, with serious nitrogen and phosphorus pollution, leading to prominent eutrophication problems. According to statistics, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/32
CPCY02W10/10
Inventor 杨永强陈繁荣
Owner 广州中科碧疆环保科技有限公司
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