Sewage treatment system combining ecological oxidation ditch and ecological box wetland
A technology of sewage treatment system and ecological box, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., to achieve the effect of saving land resources and improving sewage purification ability
Active Publication Date: 2017-06-06
SHANGHAI AQUATIC ENVIRONMENT ENG CO LTD
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Problems solved by technology
However, it only uses the method of artificial wetland to strengthen the restoration of water body denitrification, and it cannot treat the water quality with small BOD well.
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[0030] Example A sewage treatment system combining ecological oxidation ditch and ecological wetland
[0031] A sewage treatment system combining ecological oxidation ditch and ecological box wetland, such as figure 1 As shown, it includes the ecological oxidation ditch 1 in the sub-region of the sewage import and export and the ecological box wetland 2 connected in series at the top opening; the direction of the arrow in the figure represents the direction of water flow, and the sewage enters the ecological oxidation ditch and then passes through the ecological box wetland. processed and eventually flow into rivers.
[0032] Such as figure 2 As shown, the ecological oxidation ditch 1 is divided into areas according to the height of the water level line, and includes submerged plant area 3, floating leaf plant area 4 and emergent plant area 5 in sequence from low to high. Different kinds of plants are used to treat the sewage, the sewage first flows through the ecological o...
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Abstract
The invention discloses a sewage processing system with combined ecological oxidation ditch and ecological wetland boxes. A combination of the ecological oxidation ditch and the ecological wetland boxes enables the land resources to be saved to a greatest extent, sewage purifying capability to be greatly improved and broad-spectrum pollution-cleaning effect to be obtained. According to the invention, sewage flows through the ecological oxidation ditch at first, COD, TN, NH4<+>-N, TP and the like in the sewage are preliminarily absorbed and removed by water plants in the ecological oxidation ditch, and the amount of dissolved oxygen in the sewage is increased; sewage flowing out after oxygen enrichment flows into the ecological wetland boxes in series connection from the bottom of the ecological wetland boxes and flows out from the sidewall of the top of the ecological wetland boxes, the ecological wetland boxes exert filtering and purifying effects in the whole hydraulic retention process, which is beneficial for removal of organic particles in the sewage; the sewage rich in dissolved oxygen facilitates culture of a biomembrane on the surface layer of a filter material, and nitration is carried out to convert ammonia nitrogen and nitrite nitrogen; and wetland plants located at a top layer further absorb elemental N and elemental P in the sewage and exert a beautifying effect. The sewage processing system provided by the invention is applicable to sewage treatment of a severely-polluted water body before discharging of the severely-polluted water body into a river.
Description
technical field [0001] The invention belongs to the field of environmental protection and relates to a sewage treatment system, in particular to a sewage treatment system combining an ecological oxidation ditch and an ecological box wetland. Background technique [0002] With the improvement of people's living standards, the requirements and tastes of living quarters are getting higher and higher. Therefore, in many new urban areas or living quarters, developers have built artificial lakes or small landscape water bodies. In order to ensure water quality, aquatic plants are usually used. , The method of building an ecological system to purify water quality and reduce pollution. However, for the ecological rivers that have been restored, the polluted water body is not suitable for direct discharge into it, and the sewage source treatment needs to be carried out for a certain period of time, and it can only be discharged after cooperating with the government's municipal rainwa...
Claims
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IPC IPC(8): C02F9/14
Inventor 郑小燕王丽卿赵风斌徐后涛张玮
Owner SHANGHAI AQUATIC ENVIRONMENT ENG CO LTD