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Combined purification system for efficiently treating rural domestic sewage

A domestic sewage and purification system technology, applied in the direction of filtration treatment, reflux water treatment, multi-stage water treatment, etc., can solve the problems that the denitrification efficiency has not been effectively improved, the denitrification efficiency has not been improved, and dead water areas are easy to form. Achieve the effects of precise dosing and continuous release, saving floor space, and improving denitrification efficiency

Active Publication Date: 2022-01-04
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing method of combining biofilm technology with ecological ponds only improves the nitrification efficiency to a certain extent but does not improve the denitrification efficiency, so that the denitrification efficiency has not been effectively improved; Comprehensive facultative pond with aerobic and aerobic sewage treatment capacity, but the sewage in the deep pond area is easy to stay here, and it is easy to form dead water area, causing secondary pollution; in the existing method, methane and oxygen are mixed and added to the water, There is a risk of explosion in this way, and how to ensure the anaerobic conditions required for denitrification while introducing oxygen is also a problem to be solved; in addition, there is a way to transfer methane to water through a membrane aeration system , and then transfer oxygen to the water through an independent aeration system to increase the dissolved oxygen in the water to make methane react with oxygen. Although this method also avoids the mixing of methane and oxygen, the increase of dissolved oxygen in water will inhibit the denitrification reaction

Method used

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  • Combined purification system for efficiently treating rural domestic sewage
  • Combined purification system for efficiently treating rural domestic sewage
  • Combined purification system for efficiently treating rural domestic sewage

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Experimental program
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Effect test

Embodiment 1

[0038] A combined purification system for efficient treatment of rural domestic sewage of the present invention includes a water inlet device, a sewage pretreatment device, a facultative pond 33, a constructed wetland system and a shallow water plant pond 17, and the water inlet device includes a black water drain pipe 1 and an ash The water drainage pipe 2, the black water drainage pipe 1 are connected with the black water grid pool 4, the gray water drainage pipe 2 is connected with the gray water grid pool 3; the outlet of the gray water grid pool 3 is connected with a gray water pipe 8; A sewage pretreatment device is connected to the water outlet of the water grid pool 4 .

[0039] The sewage pretreatment device includes a biogas tank 6 connected to the water outlet of the black water grid pool 4, the water outlet of the biogas tank 6 is connected with one end of a black water pipeline 7, and the other end of the black water pipeline 7 is connected to the ash via a tee joi...

Embodiment 2

[0051] Example 2 Determination of the included angle θ between carbon source placement PVC pipe and horizontal plane

[0052] The determination of the angle θ between the carbon source placing the PVC pipe and the horizontal plane needs to take into account the problems such as the roughness of the PVC pipe, the height and width of the wetland, and needs to be calculated according to the actual situation.

[0053] Assume that the cross-section of the constructed wetland is 1.6m high and 1m wide, and the density of the carbon source is 1.5×10 3 kg / m 3 , It is known that the friction coefficient of PVC pipes is 0.5 to 0.4, and the biofilm is attached to the pipes, and the friction coefficient increases, which is assumed to be 0.85. Through the derivation of the momentum theorem and the hydrostatic equation, the minimum angle θ at which the carbon source is placed in the PVC pipe 23 is 33°, and the maximum angle is determined according to the height, width, and oxygen zone of th...

Embodiment 3

[0054] Embodiment 3 Workflow of the present invention

[0055] The rural grey water enters the main water inlet pipe 11 through the grey water pipe 8 after passing through the grey water grid tank 3 from the grey water drainage pipe 2. The rural black water passes through the black water grid pool 4 and then enters the biogas tank 6 for processing and enters the main water inlet pipe 11 through the black water pipeline 7. The gas generated by the biogas tank 6 obtains purer methane gas through the filter device and enters the The methane gas pipe 12 is transported to the gas permeable membrane 29 in the deep water area. In addition, an oxygen gas pump 14 inputs oxygen into the oxygen gas conduit 16, adjusts the oxygen pressure through the oxygen pressure regulating valve 15, and transmits it to the floating plate hollow fiber membrane 26 under the floating plate 27, and the bottom hollow hanging below the water outlet pipe in the deep water area. in the fiber membrane 30 . T...

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Abstract

The invention discloses a combined purification system for efficiently treating rural domestic sewage. The system comprises a water inlet device, a sewage pretreatment device, a facultative pond, a constructed wetland system and a shallow water plant pond, adopts a facultative pond, constructed wetland and shallow water plant pond combined process, and is combined with a biological membrane treatment technology, so that the removal efficiency of nitrogen and phosphorus is enhanced. A biological membrane system with a special structure can be used for microporous aeration and biological membrane formation, a carbon source is also provided for denitrification reaction, and accurate feeding and continuous release of the carbon source are realized in an ecological pond and an artificial wetland. A special annular structure is utilized, so that the occupied area of the treatment process is saved, and the effect of beautifying the country is also achieved.

Description

technical field [0001] The invention relates to a combined purification system for efficiently treating rural domestic sewage, belonging to the technical field of sewage purification. Background technique [0002] At present, the common rural sewage treatment technologies in China can be divided into physical and chemical methods, biological methods and ecological methods. The biological method uses the metabolic activities of microorganisms to achieve the removal of pollutants in the sewage. The ecological method is to synergistically degrade the pollutants in the sewage through a combined system composed of microorganisms, plants and soil. Common processes include artificial wetland technology, ecological ponds, etc. . [0003] The existing method of combining biofilm technology with ecological ponds only improves the nitrification efficiency to a certain extent, but does not improve the denitrification efficiency, so that the denitrification efficiency has not been effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/32
CPCC02F3/301C02F3/302C02F3/32C02F2305/06C02F2301/08C02F1/001C02F2209/22C02F2301/04Y02W10/10
Inventor 陈欣怡顾莉谢泽解雨薇许润阳张子豪
Owner HOHAI UNIV
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