High-load capillary infiltration trench system for treating domestic wastewater

A domestic sewage, high-load technology, applied in biological sludge treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of low denitrification rate, low hydraulic load, insufficient oxygen supply capacity, etc. problems, to achieve the effect of less operation and management costs, less environmental impact, and no public health

Inactive Publication Date: 2008-07-30
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of the existing capillary infiltration ditch system, and provide a new high-load capillary infiltration ditch that can solve the problems of the traditional capillary infiltration ditch system such as low hydraulic load, insufficient oxygen supply capacity, and low denitrification rate. system

Method used

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  • High-load capillary infiltration trench system for treating domestic wastewater

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: A demonstration project for 5 households in a central village of a town in the Taihu Lake Basin.

[0029] The dimensions of the demonstration project are: length 3.0m, width 3.0m, depth 0.95m. The design processing capacity is 2.5t / d, and the design hydraulic load is 0.3m 3 / (m 2 d). The actual running water distribution / drain ratio is 1:3.

[0030] The sewage flows into the capillary infiltration ditch system from the hydrolytic acidification tank. The section diagram of the seepage ditch system used in this project is shown in the figure. From top to bottom, a 30cm-thick surface soil layer, a 20cm-thick sandy soil layer, a 35cm-thick artificial soil layer, and a 10cm-thick water-conducting layer are set in sequence; a hydrolytic acidification tank is set in front of the system as a system pretreatment unit; Honeysuckle is planted on the upper layer, and the surface water distribution pipe and the deep water distribution pipe connected with the hydrolys...

Embodiment 2

[0039] Example 2: A demonstration project for 7 households in a natural village in a certain town in the Taihu Lake Basin.

[0040] The dimensions of the demonstration project are: length 5.0m, width 4.0m, depth 1.1m. The design processing capacity is 4t / d, and the hydraulic load is 0.2m 3 / (m 2 d). The actual running water distribution / drain ratio is 1:3.

[0041] The sewage flows into the capillary infiltration ditch system from the hydrolytic acidification tank. The section diagram of the seepage ditch system used in this project is shown in the figure. From top to bottom, a 35cm thick surface soil layer, a 25cm sandy soil layer, a 40cm artificial soil layer, and a 10cm thick water-conducting layer are successively arranged; The surface water distribution pipe and the deep water distribution pipe connected with the hydrolysis acidification tank are respectively arranged, and the drainage pipe connected with the drainage tank is arranged in the aquifer; the bluestone su...

Embodiment 3

[0050] Example 3: A demonstration project for 4 households in a natural village in a certain town in the Taihu Lake Basin.

[0051] The dimensions of the demonstration project are: length 5.0m, width 3.0m, depth 1.0m. The design processing capacity is 3t / d, and the design hydraulic load is 0.2m 3 / (m 2 d). The actual running water distribution / drying time ratio is 1:4.

[0052] The sewage flows into the capillary infiltration ditch system from the hydrolytic acidification tank. The section diagram of the seepage ditch system used in this project is shown in the figure. From top to bottom, set up a surface soil layer of about 30cm, a sandy soil layer of about 20cm, an artificial soil layer of about 40cm, and an aqueduct layer of about 10cm; set up a hydrolysis acidification pool in front of the system; plant gorse on the surface soil layer For plants such as , Zanthoxylum bungeanum, etc., the surface water distribution pipe and the deep water distribution pipe connected wi...

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Abstract

The invention discloses a capillary infiltration ditch system for treating the domestic sewage, consisting of a surface soil layer, a sand-soil layer, an artificial soil layer and a water-guiding layer from the top to bottom in sequence; wherein, plants are planted on the surface soil layer, wherein, the soil layer of the surface is planted with the plants; in the surface soil layer and the artificial soil layer, a surface water distribution pipe and an inner water distribution pipe are respectively provided with surface cloth tube and deep cloth tube communicated with a hydrolysis acidification unit or a septic tank; the periphery of the water distribution pipe is the green pebble encapsulated with an earthwork cloth; the water-guiding layer is provided with a water-discharging pipe communicated with the water-discharging pool and an air-drawing duct for naturally forcing the ventilation with an air-drawing principle. With higher water-force load, the invention has a higher removal efficiency of the COD, BOD5, total phosphorus, NH4<+>-N, TN in the domestic sewage. The effluent achieves the national sewage comprehensive discharge standard. The invention has the advantages of low cost in the basic construction and an operation management, small impact by the environment, no public health problems as well as vegetables and economic plants- planting. The invention is particularly applied to treat the distribution sewage with a high cost pipe building and a high requirement of the nitrogen and phosphorus removal.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a system capable of treating domestic sewage discharged from relatively scattered residential areas in villages and towns. Background technique [0002] At present, there are more than 600,000 administrative villages and more than 2.5 million natural villages in China, where more than 200 million peasant households and nearly 800 million people live. Rural areas have a large volume and a wide area, and the specific conditions vary greatly. Sewage treatment must be tailored to local conditions, classified and guided, and practical treatment requirements and methods must be put forward. For the vast traditional agricultural areas, using the natural purification ability of the local ecological environment, it is very realistic to adopt a land treatment system to treat domestic sewage; at the same time, with the development of tourism and real estate in my country, a large ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44C02F3/32C02F3/34C02F11/04
Inventor 郑正李军状罗兴章杨世关张继彪李继红申荣艳冯景伟黄星发赵国华李坤权李培培孟卓聂耳陈广银方彩霞王为平邹星星高顺枝伦琳
Owner NANJING UNIV
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