Intensified water-layout underground infiltration water treatment method and system

A sewage treatment method and technology of sewage treatment system, which are applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the limitation of operation and management costs, great influence of environmental conditions, and damage to the ground landscape. and other problems, to achieve the effect of saving operation and management costs, simple management, and reducing soil blockage

Inactive Publication Date: 2003-03-26
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional processes represented by activated sludge process, such as anaerobic / aerobic process (A / O), anaerobic / facultative / aerobic process (A 2 / O), Sequencing Batch Activated Sludge Process (SBR), etc. Although the technology is relatively mature, the expensive construction cost and operation management cost limit their wide application, especially in the scattered residential areas of towns and towns that lack sewage collection systems.
[0004] Conventional land treatment processes, such as slow infiltration systems, rapid infiltration systems, and overland flow systems, usually have a cost-effective treatment effect on domestic sewage, but these processes are also greatly affected by environmental conditions, destroying the ground landscape, and emitting odors , occupying a large area and other disadvantages

Method used

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  • Intensified water-layout underground infiltration water treatment method and system
  • Intensified water-layout underground infiltration water treatment method and system
  • Intensified water-layout underground infiltration water treatment method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The infiltration soil layer in the infiltration ditch is Beijing fluvo-aquic soil mixed with 10% peat soil, bluegrass is planted on the surface, the buried depth of the water distribution pipe is 30cm, the buried depth of the water collection pipe is 80cm, the hydraulic load of the system is 2cm / d, and the area of ​​the infiltration system 2m 2 , The sewage is fed in by continuous batching. The influent water is domestic sewage, and the concentrations of COD, ammonia nitrogen, total nitrogen and total phosphorus are 93.2-264.0mg / L, 22.2-50.0mg / L, 43.41-49.28mg / L, 2-5mg / L respectively. After treatment by the underground infiltration system, the removal rate of COD, ammonia nitrogen and total phosphorus in the system is above 90%, and the removal rate of total nitrogen is also up to 63.5%. The concentrations of COD, ammonia nitrogen, total nitrogen and total phosphorus in the effluent are respectively lower than 50mg / L, 0.02mg / L, 30mg / L and 0.025mg / L, meeting the "Water...

Embodiment 2

[0026] The infiltration soil layer in the infiltration ditch is Yunnan red loam mixed with 25% slag and 8% peat. The surface is planted with ryegrass. The buried depth of the water distribution pipe is 30cm, and the buried depth of the water collection pipe is 80cm. The hydraulic load of the system is 2cm / d. Filtration system area 9m 2 , the way of continuous sewage dosing is used to feed water, and the average concentrations of COD, ammonia nitrogen, total nitrogen and total phosphorus in the water are respectively 76.0mg / L, 13.2mg / L, 21.2mg / L, 1.94mg / L of domestic sewage, the system The removal rates of COD, ammonia nitrogen, total nitrogen and total phosphorus are 83%, 70%, 77.7% and 98% respectively, and the average concentrations of COD, ammonia nitrogen, total nitrogen and total phosphorus in the treated water are 11.7mg / L and 4.0mg / L L, 4.7mg / L and 0.04mg / L, the treated water meets the "Water Quality Standard for Domestic Miscellaneous Water" (CJ25·1-89) issued by the M...

Embodiment 3

[0028] The infiltration soil layer in the infiltration ditch is Yunnan red loam mixed with 25% slag and 8% peat. The buried depth of the water distribution pipe is 40cm, the buried depth of the water collection pipe is 100cm, the hydraulic load of the system is 4cm / d, and the area of ​​the infiltration system is 9m 2 , using a dry-wet cycle ratio of 1:1 to feed water (that is, dosing sewage for 1 day, and then drying it for 1 day), and the average concentrations of COD, ammonia nitrogen, total nitrogen and total phosphorus in the water are 132mg / L and 14.2mg / L respectively , 19.5mg / L and 3.4mg / L domestic sewage, the removal rates of COD, ammonia nitrogen, total nitrogen and total phosphorus by the system were 88.7%, 94.9%, 91.2% and 98.2% respectively, and the COD, ammonia nitrogen, The average concentrations of total nitrogen and total phosphorus are 14.9mg / L, 0.72mg / L, 1.7mg / L and 0.06mg / L, and the treated effluent meets the "Water Quality Standard for Domestic Miscellaneous ...

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Abstract

Under the surface plants several percolating channels and water-distributing grooves are set, the interior of percolating channel is filled with artifically-made speciall soil, and at two sides of water-distributing groove the reinforced water-distributing material can be set, under the action of comprhensive cleaning function of soil, microorganism and plant system, the sewage can be cleaned, the cleaned water can be collected by a water-collecting channel set on the impervious layer of its bottom portion, and discharged out by a water-collecting tube. Said invention can make removing rate of COD, amino nitrogen, total nitrogen and total phosphorus being in domestic sewage by up to above 90%.

Description

technical field [0001] The invention relates to a domestic sewage land treatment technology, in particular to an underground capillary infiltration sewage treatment method for domestic sewage treatment in scattered residential areas such as urban residential quarters, towns, vacation villages, and sanatoriums, and for reuse of treated water. device. Background technique [0002] In recent years, with the development of economy and society, environmental problems have become increasingly prominent, and sewage treatment is very urgent not only in cities but also in rural areas. The eutrophication of many closed water bodies is becoming more and more serious, and the sewage treatment technology not only requires the removal of organic matter, but also puts forward higher requirements for the removal of nitrogen and phosphorus pollutants. At the same time, due to the lack of water resources in many areas, the demand for sewage reuse is also increasing. [0003] Traditional pro...

Claims

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Application Information

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IPC IPC(8): C02F3/00C02F3/06
CPCY02W10/10
Inventor 黄霞张建施汉昌胡洪营
Owner TSINGHUA UNIV
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