Distributed sewage integrated artificial wetland treatment facility and method

Abstract

The invention provides a distributed sewage integrated artificial wetland treatment facility and method. The distributed sewage integrated artificial wetland treatment facility comprises a high level water tank screening and filtering zone, a biological film treatment zone, a floating plant zone, a main wetland zone, a sand filtration sinking plant zone and a centralized water discharge zone, and a complete treatment water channels are formed in sequence, wherein the floating plant zone, the main wetland zone and the sand filtration sinking plant zone are separated to left and right parallel zones through partition boards, and a left treatment water channel and a right treatment water channel are formed. The method, provided by the invention, comprises the steps of: removing suspended dirt, treating the biological film, treating the wetland, filtering the sand, switching underflow and surface flow and configuring the plants of the main wetland zone. According to the invention, the facility only occupies 2-3 m<2> of floor, the purification efficiency reaches the standard, the facility can carry out integration production in a workshop, and the facility has the advantages of difficult blockage, easy management, convenience for maintenance and low operation cost.

Description

technical field [0001] The invention relates to a distributed sewage constructed wetland treatment facility and method, in particular to an integrated constructed wetland treatment facility and method, belonging to the technical field of sewage treatment. Background technique [0002] Since the domestic sewage pollution load exceeded the industrial wastewater pollution load for the first time in 1999, the discharge of domestic sewage exceeded 55% of the total discharge from 2006 to 2009. In 2010, the total discharge of domestic sewage reached 37.98 billion tons, accounting for 61.5% of the total. Among the 37.98 billion tons of domestic sewage, about 71% is domestic sewage in villages and towns in my country. Due to economic and geographical problems, these sewage are basically discharged directly without treatment, and most of them are distributed directly. According to the actual situation in our country, to solve the problem of decentralized sewage treatment, the use of ...

AI Technical Summary

Problems solved by technology

In practical application, subsurface flow constructed wetlands take the main position. The disadvantages are that they are easy to be blocked, the treatment effect in winter is reduced, and the area is still large. In addition, the infrastructure construction of constructed wetlands increases the investment cost, and it is difficult to return farmland. , not suitable for decentralized direct discharge of domestic sewage water treatment applications

[0004] Patent 02134344.6 discloses a stepped multi-sub-stage artificial wetland water treatment device overlapping from top to bottom. Since the device is three-dimensional, it can effectively reduce the wetland footprint, but the device is reinforced concrete or masonry construction, requiring extensive infrastructure work and increasing power to pump water to storage tanks as sub-level wetlands increase

[0005] Patent 200720156287.2 discloses a detachable artificial wetland. The device is composed of several wetland units with independent baskets. The cost is low and the farmland is easy to return. However, the wetland unit of the device uses a plastic box (volume 200L). After other inventors Due to the low pressure bearing capacity of the material, the plastic box constituting the wetland unit is difficult to apply in the actual sewage treatment

[0006] Patent 200810140288.7 discloses a circulating surface flow artificial wetland. Due to the use of a semi-buried spiral groove circulating bed, the sewage treatment capacity is increased within a certain area, and it can operate in cold weather conditions, but the The system is a surface flow artificial wetland, which still has the disadvantages of small hydraulic load rate, limited decontamination capacity, easy freezing of water surface in winter, easy growth of mosquitoes and flies in summer, and emission of odor.

[0007] Patent 200710015996.3 discloses a submerged-surface flow composite constructed wetland, which can save a certain area, and can realize the conversion of different types of constructed wetlands through water pumps, but the system requires infrastructure construction, uses too many pipes, and has pipe blockages , submerged surface flow conversion needs power and other deficiencies

[0008] Patent 200310111813.X discloses a method for denitrification and phosphorus removal of urban sewage composite constructed wetlands. This technology uses horizontal flow-vertical flow constructed wetlands. Although the land occupation has been reduced, it still occupies an area of ​​about 19m 2 , its treatment effect in the patent specification only provides the treatment efficiency of the wetland during the highest temperature period of the year (July-August), and the treatment efficiency of COD, TN and TP are 35.7%-96.7% and 2.1%-67% respectively , 2.8% to 99.5%, the range of change is large, the stability of the wetland treatment effect needs to be improved, and the treatment effect of the wetland under low temperature conditions in winter is lacking

[0009] Similar to patent 200310111813.X, 200620022790.4 discloses a composite constructed wetland, constructing a composite constructed wetland in which the vertical flow constructed wetland and the horizontal flow constructed wetland are connected in series up and down, and the area is further reduced to about 10m 2 , but the treatment effect only provides the operating results of the highest temperature period of the year (May to September) in the patent specification, and the removal rates of COD, NH4+N, TP, and TN are 56% to 97.8% and 34.9% respectively ~ 97.4%, 56.7% ~ 91.4%, 17.4% ~ 90.4%, the range of change is also very large, and there is no explanation for the treatment effect of wetlands under low temperature conditions in winter

[0010] Of course, there are many other similar technologies that have been disclosed. Although the floor space can be appropriately reduced, they are still relatively large. Most of them require infrastructure construction and cannot be integrated into production. Most technologies avoid the problem of wetland treatment effect under low humidity conditions in winter, which limits the application and promotion of facilities and systems in decentralized sewage treatment

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