Sewage treatment method based on blasting laminated artificial wetland

A sewage treatment method and a technology for constructed wetlands, which are applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., which can solve the problem that the overlap cannot be effectively utilized and the total nitrogen removal effect of sewage is limited. , unsatisfactory sewage treatment effect, etc., to achieve good denitrification and phosphorus removal capacity, improve organic matter and ammonia nitrogen removal capacity, and improve the effect of effluent quality.

Inactive Publication Date: 2012-07-25
ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this device for sewage treatment has the advantages of small footprint and wide application range compared with single-layer constructed wetlands or other treatment processes. However, the interior of the treatment device is hollow, and the overlapping parts of each sub-constructed wetland cannot be effectively utilized. , in order to improve the purification effect, it is necessary to increase the number of sub-constructed wetland layers, and correspondingly, it is necessary to expand the occupied space; in addition, the sewage in the device is always treated at the root of the plant, that is, in an aerobic environment, and the total nitrogen removal effect of the sewage is limited. The processing effect is not ideal

Method used

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  • Sewage treatment method based on blasting laminated artificial wetland
  • Sewage treatment method based on blasting laminated artificial wetland
  • Sewage treatment method based on blasting laminated artificial wetland

Examples

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Effect test

Embodiment 1

[0040] Adopt the method of the present invention to process certain rural domestic sewage, the CODcr of this rural domestic sewage is 225mg / L, ammonia nitrogen (NH 3 -N) concentration is 23.5mg / L, total nitrogen (TN) concentration is 33.7mg / L, total phosphorus (TP) concentration is 2.0mg / L, the fine grid pretreatment unit adopts the ditch with fine grid, its The inclination angle of the fine grid is 45°, the gap is 20mm, the flow velocity of the sewage in the ditch is 0.5m / s, and the flow velocity through the fine grid is 0.7m / s. The buried anaerobic digester adopts a concrete structure. For a spherical pool, set a water outlet hole at a distance of 30cm from the top of the buried anaerobic digestion tank. The flow rate of the sewage passing through the water outlet hole is 0.5m / s. The lower packing support is set at the bottom 35cm, and the elastic three-dimensional packing is fixed and suspended between the upper and lower two packing supports. The filling rate of the packin...

Embodiment 2

[0044] Adopt the method of the present invention to process certain rural domestic sewage, this rural domestic sewage CODcr is 258mg / L, and ammonia nitrogen (NH 3 -N) concentration is 28.0mg / L, total nitrogen (TN) concentration is 37.5mg / L, total phosphorus (TP) concentration is 1.8mg / L, the fine grid pretreatment unit adopts the ditch with fine grid, its The inclination angle of the fine grid is 60°, the gap is 25mm, the flow velocity of the sewage in the ditch is 0.6m / s, and the flow velocity through the fine grid is 0.85m / s. The buried anaerobic digester adopts a concrete structure. For a spherical pool, a water outlet hole is set at a distance of 30cm from the top of the buried anaerobic digestion tank. The flow rate of the sewage passing through the water outlet hole is 0.6m / s. The lower packing support is set at the bottom 35cm, and the elastic three-dimensional packing is fixed and suspended between the upper and lower two packing supports. The filling rate of the packi...

Embodiment 3

[0048] Adopt the method of the present invention to handle certain rural domestic sewage, this rural domestic sewage CODcr is 315mg / L, and ammonia nitrogen (NH 3 -N) concentration is 20.8mg / L, total nitrogen (TN) concentration is 30.5mg / L, total phosphorus (TP) concentration is 1.5mg / L, the fine grid pretreatment unit adopts the ditch with fine grid, its The inclination angle of the fine grid is 60°, the gap is 16mm, the flow velocity of the sewage in the ditch is 0.7m / s, and the flow velocity through the fine grid is 0.9m / s. The buried anaerobic digester adopts a concrete structure For a spherical pool, set a water outlet hole at a distance of 30cm from the top of the buried anaerobic digestion tank. The flow rate of the sewage passing through the water outlet hole is 0.5m / s. Set the lower packing support at the bottom 35cm, and fix and hang the elastic three-dimensional packing between the upper and lower packing supports. The filling rate of the packing is 75%, and the resi...

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Abstract

The invention discloses a sewage treatment method based on blasting laminated artificial wetland, which belongs to the technical field of sewage treatment. The sewage treatment method includes that (1) pretreated sewage is obtained after sewage is filtered and digested in an anaerobic manner, and enters the blasting laminated artificial wetland, the blasting artificial wetland structurally comprises an upper layer and a lower layer, and packing is uniformly filled in the blasting laminated artificial wetland; (2) the pretreated sewage in the blasting laminated artificial wetland is uniformly distributed on the top of the upper layer, and contacts with air blasted into the blasting laminated artificial wetland to be biologically degraded when flowing to the bottom of the upper layer; and (3) the sewage is gathered at the bottom of the upper layer after being biologically degraded and then flows into the lower layer, horizontally flows in the lower layer and is decontaminated in an anoxic environment, an anaerobic environment and an aerobic environment sequentially, and sewage treatment is completed. The method is used for treating domestic sewage in rural areas, and has the advantages of high treatment efficiency, fine treatment effect and low operation cost.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage treatment method based on blast laminated constructed wetlands. Background technique [0002] The indiscriminate discharge of rural domestic sewage without treatment can cause serious pollution of surface water runoff, and can also pollute water source water quality, increase water supply risks and treatment costs in cities, and cause difficulties in rural domestic water use. But at the same time, due to the limitation of natural conditions, rural domestic sewage is scattered and difficult to collect, and it is difficult to lay a large-scale sewage collection pipe network, so that rural domestic sewage cannot be included in large-scale centralized sewage treatment plants for centralized treatment. Able to find more suitable high-efficiency and low-consumption sewage treatment processes and methods according to local conditions. [0003] At present, the rural do...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 顾震宇胡智锋韦彦斐裘知
Owner ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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