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A coal gangue-automatically modified zeolite composite filler artificial wetland system

A technology of constructed wetland system and composite filler, which is applied in the field of coal gangue-automatically modified zeolite composite filler constructed wetland system, can solve the problems of complex prefabricated modification process, wide application of constructed wetland, and reduction of wetland cross section, etc. Achieve the effects of reducing the risk of hydrogen ion leakage from coal gangue layer leaching, improving the removal effect and pollution holding capacity, and reducing the amount of use

Inactive Publication Date: 2017-12-08
辽宁省城乡建设规划设计院有限责任公司
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Problems solved by technology

However, after many years of operation of constructed wetlands, it has been found that the wetland filling layer will gradually clog with the operation time, resulting in the reduction of the wetland cross-section, the reduction of the treatment water volume and the decline of wetland treatment efficiency. One of the main factors of application and promotion in our country
[0003] Zeolite, especially modified zeolite, has been widely used in various water treatment projects due to its good porous physical structure, but it cannot be used in constructed wetlands due to its high engineering cost and complicated prefabricated modification process. wide application

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  • A coal gangue-automatically modified zeolite composite filler artificial wetland system

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Embodiment

[0021] Example: such as figure 1 As shown, a coal gangue-automatically modified zeolite composite filler constructed wetland system of the present invention adopts a constructed wetland composite filler containing coal gangue, zeolite and gravel filler, the thickness of the filler layer is not less than 1.0m, and the filler is from top to bottom The order is planting soil 1, coal gangue 2, 3, gravel 4, and geomembrane 5.

[0022] The particle diameters of the fillers are coal gangue 8-20 mm, zeolite 5-10 mm, and gravel 10-25 mm.

[0023] The coal gangue 2, zeolite 3, and gravel 4 filter materials have an inhomogeneity coefficient K80 of 1.3-1.6.

[0024] The thickness of the planting soil 1 is 15cm, and the thickness of the gangue layer, zeolite layer, and gravel layer is different according to the concentration of influent suspended solids (SS), and the thickness and hydraulic load of the underflow wetland are determined, as follows:

[0025] When the influent concentration...

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Abstract

The invention relates to a coal gangue and automatic modified zeolite composite filler artificial wetland system. Artificial wetland composite filler containing coal gangue, zeolite and gravel filler is adopted, the thickness of the filler layer is 1.0 m or more, and the filler sequentially comprises planting soil, coal gangue, zeolite, gravel and a geomembrane. The pH value index of coal gangue filler layer filtered water is controlled by adjusting retention time and flow speed of sewage in the coal gangue filler layer on different water quality conditions, weak-acid filtrate directly acts on a lower zeolite filler layer, zeolite filter can be modified automatically, and the pollutant removal effect of the zeolite filler layer is effectively improved. A large-particle-diameter reverse grading filler technology is adopted, while surface layer filler blocking is effectively relieved, the capacity for treating and containing pollutants in the sewage of the modified zeolite layer is improved, the anti-blocking period of an artificial wetland is prolonged, and the use ratio of coal gangue is increased.

Description

technical field [0001] The invention relates to a coal gangue-automatically modified zeolite composite filler artificial wetland system, which can realize the resource utilization of coal gangue while alleviating the blockage problem of the underflow artificial wetland filler layer. Background technique [0002] Constructed wetland technology has been widely used in various sewage treatment and river ecological improvement projects due to its advantages such as low construction and operation costs and simple management, and has achieved good operational results. However, after many years of operation of constructed wetlands, it has been found that the wetland filling layer will gradually clog with the operation time, resulting in the reduction of the wetland cross-section, the reduction of the treatment water volume and the decline of wetland treatment efficiency. One of the main factors of application and promotion in our country. [0003] Zeolite, especially modified zeol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32
CPCC02F3/32C02F2209/06Y02W10/10
Inventor 张荣新傅金祥王国强
Owner 辽宁省城乡建设规划设计院有限责任公司
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