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Polluted water ecological treatment composite process

A technology of ecological treatment and combined process, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of limited application range, limited application of treatment system area, and achieve small footprint effect

Inactive Publication Date: 2005-03-09
SHENYANG ACAD OF ENVIRONMENTAL SCI +1
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AI Technical Summary

Problems solved by technology

[0003] Constructed wetland sewage ecological treatment technology has been widely used since the 1970s, but the large area occupied by the treatment system seriously limits the application of this technology in my country, and, in the northern region, the low temperature in winter also seriously limits the application of this technology. The scope of application of this technology (Document 1: Sun Tieheng, Zhou Siyi, etc., Technical Guidelines for Urban Sewage Land Treatment System, 1997, Beijing, China Environmental Science Press; Document 2: Gao Zhengmin, Li Xianxian, etc., Urban Sewage Land Treatment Utilization Design Manual, 1991 , Beijing, China Standard Press)

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  • Polluted water ecological treatment composite process
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  • Polluted water ecological treatment composite process

Examples

Experimental program
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Effect test

Embodiment 1

[0017] The treatment object is typical domestic sewage, COD280mg / L, BOD120mg / L, using figure 1 process shown. The sewage passes through the regulating tank (grid, grit chamber), and is lifted by the water pump to the floating biological bed system for pretreatment. The effluent of the floating biological bed enters the sedimentation tank, and the effluent of the sedimentation tank enters the horizontal subsurface flow to construct a wetland system. After the sludge is concentrated, it is removed ( Part of the sludge can be lifted by the water pumping station and enter the floating biological bed system again).

[0018] During the pretreatment process, the plant growth season (summer) adopts the operation mode of primary treatment and intermittent aeration, only to ensure that the floating biological bed filler reaches a suspended state. The floating biological bed system is characterized by an air-to-water ratio of 3:1, which can remove More than 1 / 3 of COD in sewage Cr , CO...

Embodiment 2

[0023] The difference from Example 1 is that the plant species in the constructed wetland in this example is Zizania.

[0024] The plant growth season (summer) adopts the operation mode of primary treatment and intermittent aeration, only to ensure that the floating biological bed filler reaches a suspended state, and the air-water ratio of the floating biological bed system is 4:1; non-plant growth season (winter) increases the aeration. Air volume (the air-water ratio of the floating biological bed system in this embodiment is 10:1).

[0025] The sewage treated by the floating biological bed enters the composite subsurface flow wetland with the combination of horizontal flow and vertical flow. The wetland system is composed of sub-clay layer, sand layer, 6 layers of gravel filler layers with different particle sizes and anti-seepage layer. The diameters of the lower six layers of gravel are 20-25, 5-10, 10-15, 15-20, 20-25, and 25-30 millimeters respectively.

[0026] Its e...

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Abstract

A process for treating sewage by ecological method includes such steps as regulating pH value in regulation pool, pumping into floated biobed system, pretreating, depositing in position pool, treating by underflow-type artificial nunja system, and concentrating mud.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a pretreatment-constructed wetland sewage ecological treatment combined process. Background technique [0002] Constructed wetland sewage treatment is one of the most important types of sewage ecological treatment. It is to distribute sewage to the land in a controlled manner, and use the physical, chemical and biological characteristics of the soil-hygrophyte-microbial complex system to treat the waste water in sewage. The process technology of recycling water and fertilizer resources and purifying degradable pollutants in sewage not only plays the role of sewage purification, but also forms a unique natural artificial composite ecological landscape by creating a wetland environment. The sewage ecological treatment system represented by the constructed wetland system has many advantages such as low investment, good effluent quality, strong impact resistance, increased g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/32
Inventor 陈晓东贾宏宇常文越林阳孙铁珩周启星华涛孙俊
Owner SHENYANG ACAD OF ENVIRONMENTAL SCI
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