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Combined constructed wetland system capable of stably treating domestic sewage all year around and operating method

A constructed wetland system and stable treatment technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve problems such as reduced operation effect in winter, achieve high stability of sewage treatment and withstand different loads Ability-enhancing, plant-rich effects

Active Publication Date: 2016-01-06
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a combined constructed wetland system and operation method for stably treating domestic sewage throughout the year, aiming at the problems of reduced winter operation effect of the current surface flow constructed wetland technology and low carbon-nitrogen ratio of wetland inflow in summer, to provide a A combined surface flow artificial wetland based on the optimal configuration of seasonal plants with low investment, good effect treatment, relatively simple maintenance

Method used

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  • Combined constructed wetland system capable of stably treating domestic sewage all year around and operating method
  • Combined constructed wetland system capable of stably treating domestic sewage all year around and operating method
  • Combined constructed wetland system capable of stably treating domestic sewage all year around and operating method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Such as figure 1As shown, the combined wetland is a tandem seasonal plant combination wetland, which is composed of two artificial wetlands in series. The emergent plant wetland A is planted with the emergent plant reed 3, and the submerged plant wetland B is planted with the cold-loving and submerged plant Smilax 4. There are two layers of matrix in the wetland, the bottom layer is the anti-seepage layer, the top of the anti-seepage layer is the gravel layer 1, and the river sand layer 2 is above the gravel layer, and the hydraulic gradient is 0.5%. Water inlet 5 and emergent plant wetland water outlet 6-a are set in emergent plant wetland A, water inlet 5 is connected to water inlet pipe 7, and emergent plant wetland water inlet pipe valve 8-a is installed on the water inlet pipe, and emergent plant wetland outlet Water outlet 6-a is connected to emergent plant wetland catchment channel 9-a, and there is outlet 6-b of emergent plant wetland catchment channel on one si...

Embodiment 2

[0033] Such as figure 2 As shown, the combined wetland is a circular seasonal plant combined artificial wetland. The main body of the wetland is composed of an outer ditch 1, an inner ditch 2 and a central island 3. The outer ditch 1 is planted with emergent plants, and the inner ditch 2 is planted with submerged plants. Each ditch is separated by a retaining wall 4 . There are transmission holes on the water retaining wall 4; two gates 6 are set in the inner ditch 2, and a sewage pump 8 connected to the return pipe 7 is installed at the water inlet of the inner ditch 2, and the return pipe valve 9-a and the flow rate of the return pipe are installed on the return pipe 7 Meter 10-a; the bottom of the central island 3 is connected to a drainpipe 11, and the drainpipe 11 is equipped with a drainpipe valve 9-b and a drainpipe flowmeter 10-b. The structure of the wetland matrix and the types of water pipes are the same as in Example 1, and the retaining wall is constructed with...

Embodiment 3

[0037] Such as image 3 As shown, the artificial wetland is composed of emergent plant wetland B and submerged plant wetland A. The main water inlet pipe 1 is divided into the water inlet branch pipe 2-b of the emergent plant wetland and the water inlet branch pipe 2-a of the submerged plant wetland wetland. 7 is divided into emergent plant wetland water outlet branch pipe 6-b and submerged plant wetland water outlet branch pipe 6-a, emergent plant wetland water inlet branch pipe 2-b and submerged plant wetland water inlet branch pipe 2-a respectively equipped with The flow control valve is equipped with a sewage pump 4 in the submerged plant wetland. The sewage pump 4 is connected to the return pipe 5. The return pipe 5 is equipped with a valve 8 and a flow meter 9. The return pipe 5 passes through the retaining wall 10 and connects to the emergent plant wetland. The structure of the wetland substrate and the type of water delivery pipes are the same as in Example 1, and the ...

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Abstract

The invention discloses a combined constructed wetland system capable of stably treating domestic sewage all year around and an operating method. The system comprises an emerging plant wetland, a submerged plant wetland and a sewage pump, wherein the emerging plant wetland and the submerged plant wetland are combined; valves are arranged at the combined position; the sewage pump is arranged in the submerged plant wetland, and leading water in the submerged plant wetland to the emerging plant wetland in summer; the system is operated in a continuous water inlet and plug-flow water outlet manner. Such thermophilic emerging plants as reeds and cattails and such psychrophilic submerged plants as potamogeton crispus and elodea nuttallii, namely two types of seasonal plants, are matched and combined to achieve complementation in the system, so as to effectively overcome the defects that the carbon-nitrogen ratio of the sewage in summer is low and the seasonal effect on the conventional surface flow constructed wetland is great.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering sewage treatment, and in particular relates to a combined artificial wetland system and an operating method for stably treating domestic sewage throughout the year. Background technique [0002] As a sewage ecological treatment process, constructed wetland has been widely used in domestic sewage treatment due to its advantages of low investment, low energy consumption, good effect, and simple maintenance and management. Constructed wetlands are generally divided into surface flow constructed wetlands and subsurface flow constructed wetlands. Compared with subsurface flow constructed wetlands, surface flow constructed wetlands have the advantages of low investment and simple process. [0003] There are still many problems in the existing surface flow constructed wetlands. The main points are as follows: the plant species in the system are single, mostly emergent plants such as ree...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 张建孙海盟郭烨烨张成禄梁爽谢慧君刘建王洪秀
Owner SHANDONG UNIV
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