Biological adsorption and artificial wetland combined town sewage treatment system and method

A constructed wetland and biological adsorption technology, applied in the fields of adsorbed water/sewage treatment, biological water/sewage treatment, sustainable biological treatment, etc. The reproduction speed is fast, the sludge settling performance is good, and the effect of solving the large area is solved.

Inactive Publication Date: 2007-05-23
BEIJING GUOHUAN TSINGHUA ENVIRONMENT ENG DESIGN & RES INST CO LTD BEIJING CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned artificial wetland technology in sewage treatment, and propose a sewage treatment method combining biosorption and artificial wetland. A biosorption unit is set in front of the artificial wetland to remove part of the organic matter in advance. Improve the biodegradability of sewage, thus effectively solving the problems of large area of ​​artificial wetland, easy to block and poor treatment effect in winter

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  • Biological adsorption and artificial wetland combined town sewage treatment system and method

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Embodiment 1

[0031] The sewage treatment scale of this embodiment is 20,000 m 3 / d, the influent is domestic sewage in cities and towns.

[0032] The sewage treatment method of the present embodiment comprises the following steps:

[0033] 1) The sewage to be treated is firstly pretreated by coarse and fine grids and grit chambers to remove floating matter and fine sand particles in the sewage (thick and fine grids and grit chambers are conventional equipment for water treatment);

[0034] 2) Then the water enters the A section aeration tank of the A section biosorption unit of the AB process, removes suspended particles (SS) and organic matter (BOD) in the water, and simultaneously removes nitrogen and phosphorus; the A section aeration of the present embodiment The parameters used in the pool are: hydraulic retention time 30min, sludge load 6.0kgBOD 5 / kgMLSS·d, dissolved oxygen is 0.5mg / l;

[0035] 3) The sewage continues to pass through the A section sedimentation tank of the A sect...

Embodiment 2

[0040] The sewage treatment scale of this embodiment is 8000m 3 / d, the influent is domestic sewage and industrial wastewater, and industrial wastewater accounts for about 20% of the total sewage.

[0041] The sewage treatment method of the present embodiment comprises the following steps:

[0042] 1) The sewage to be treated first passes through the coarse and fine grids and the grit chamber to remove the floating matter and fine sand particles in the sewage;

[0043] 2) Then the water enters the A section of the AB process, that is, the A section aeration tank of the biosorption unit, and removes suspended particles (SS) and organic matter (BOD) in the water. The parameters used in the A section aeration tank of the present embodiment are : Hydraulic retention time 40min, sludge load 4.0kgBOD 5 / kgMLSS·d, dissolved oxygen is 1.5mg / l;

[0044] 3) The sewage continues to pass through the sedimentation tank of the A section of the A section of the AB process, so that the flo...

Embodiment 3

[0048] Sewage treatment scale is 6000m 3 / d, the influent is domestic sewage.

[0049] The sewage treatment method of the present embodiment comprises the following steps:

[0050] 1) The sewage to be treated is firstly pretreated through the coarse and fine grids and the grit chamber to remove the floating matter and fine sand particles in the sewage;

[0051] 2) Then the water enters the A section aeration tank of the A section biosorption unit of the AB process, removes suspended particles (SS) and organic matter (BOD) in the water, and simultaneously removes nitrogen and phosphorus; the A section aeration of the present embodiment The design parameters adopted by the tank are hydraulic retention time 50min, sludge load 4.5kgBOD 5 / kgMLSS·d, dissolved oxygen is 1.2mg / l;

[0052] 3) The sewage continues to pass through the sedimentation tank of the A section of the A section of the AB process, so that the flocculent activated sludge and inorganic suspended particles in th...

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Abstract

The invention relates to the cities sewage system and treating method which combines biological adsorbing and artificial wet land, and it belongs to city-government and environmental-protection domain. The system includes coarse and fine racks, sedimentation basin, and aerator and depositing tank of a stage in AB technology, underflow gallet beds artificial wet land and pipes connecting all devices. The method includes the following steps: removing the floating substances and fine sands through the coarse and fine racks, sendiment basin; removing the suspended particulate and organics, nitrogen and phosphorous through aerator of A stage; precipitating the floccular active sludge and organic suspended particulate through the depositing tank of A stage; the water entering the underflow gallet beds artificial wet land; contacting sterilizing to discharge the water. The invention has combined the biological adsorption and artificial wet land which can remove some organics in advance to increase the possibility of bio-treating the water so that it has solved many problems in wet land treating technology such as large occupying area, easy to be blocked and poor treatment efficiency in winter.

Description

Technical field: [0001] The invention belongs to the field of municipal and environmental protection engineering, and in particular relates to a new urban sewage treatment process combining biological adsorption and artificial wetland. Background technique [0002] Constructed wetland originated in the 1970s and is one of the rapid development of sewage ecological treatment technologies in recent years. Constructed wetlands refer to artificially designed and constructed ecosystems that simulate the structure and function of natural wetlands. Using the three coordination functions of substrate-plant-microbes in the system, physics, chemistry and biology, through substrate filtration, adsorption, precipitation, ion exchange, plant Absorption and microbial decomposition to achieve efficient purification of sewage. Constructed wetlands have been widely used all over the world due to their good treatment effects, low investment and operating costs, and simple and convenient oper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/02C02F3/12C02F1/28
CPCY02W10/10
Inventor 张鸿涛白庆中高用贵黄守斌王卓艺许卫国
Owner BEIJING GUOHUAN TSINGHUA ENVIRONMENT ENG DESIGN & RES INST CO LTD BEIJING CHINA
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