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Combined artificial wetland system and operation method for stably treating domestic sewage throughout the year

A constructed wetland system and stable treatment technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc. High, plant-rich effects

Active Publication Date: 2017-12-01
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 artificial wetland system and operation method for stably treating domestic sewage throughout the year
  • Combined artificial wetland system and operation method for stably treating domestic sewage throughout the year
  • Combined artificial wetland system and operation method for stably treating domestic sewage throughout the year

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 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

[0031] 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 15, an inner ditch 16 and a central island 17. The outer ditch 15 is planted with emergent plants, and the inner ditch 16 is planted with submerged plants. Each ditch is separated by a retaining wall 18. There are transmission holes on the water retaining wall 18; two gates 20 are set in the inner ditch 16, and a sewage pump 22-b connected to the return pipe 21-b is arranged at the water inlet of the inner ditch 16, and a return pipe valve 23 is installed on the return pipe 21-b -a and return pipe flowmeter 24-a; the bottom of central island 17 is connected to drainpipe 25, and drainpipe 25 is equipped with drainpipe valve 23-b and drainpipe flowmeter 24-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 reinforced c...

Embodiment 3

[0035] Such as image 3 As shown, the artificial wetland is composed of emergent plant wetland A and submerged plant wetland B. The main water inlet pipe 26 is divided into the water inlet branch pipe 27-b of the emergent plant wetland and the water inlet branch pipe 27-a of the submerged plant wetland, and the main water outlet pipe 32 Divided into branch pipe 31-b for water outlet of emergent plant wetland and branch pipe 31-a for water outlet of wetland submerged plant, water branch pipe 27-b for water inlet of emergent plant wetland and branch pipe 27-a for water inlet of submerged plant wetland are respectively equipped with flow control valves , the submerged plant wetland is equipped with a sewage pump 29-c, the sewage pump 29-c is connected to the return pipe 30-c, the return pipe 30-c is equipped with a valve 33 and a flow meter 34, and the return pipe 30-c passes through the retaining wall 35 is connected to the emergent plant wetland. The structure of the wetland s...

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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 Patents(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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