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Method for enhanced nitrogen removal of tidal flow-horizontal subsurface flow hybrid constructed wetland and system thereof

A technology of artificial wetland and horizontal subsurface flow, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve poor reoxygenation ability, low dissolved oxygen level, and incomplete denitrification effect To achieve the effect of deepening the depth of reoxygenation, enhancing the effect of reoxygenation, and ensuring normal and efficient operation

Inactive Publication Date: 2013-02-13
CHINA AGRI UNIV
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Problems solved by technology

[0007] Aiming at the problems of poor reoxygenation capacity, low dissolved oxygen level, and incomplete denitrification effect that often occur in traditional constructed wetlands, the present invention provides a method and system for enhanced denitrification in a tidal flow-horizontal subsurface flow combined constructed wetland. The principle of complementary advantages, making full use of the characteristics of good reoxygenation effect of tidal flow constructed wetland and anoxic bed of horizontal subsurface flow constructed wetland, creates conditions for full nitrification / denitrification, and realizes enhanced removal of nitrogen in wastewater

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  • Method for enhanced nitrogen removal of tidal flow-horizontal subsurface flow hybrid constructed wetland and system thereof
  • Method for enhanced nitrogen removal of tidal flow-horizontal subsurface flow hybrid constructed wetland and system thereof

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Embodiment Construction

[0046] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0047] Such as figure 1 and figure 2 As shown, the tidal flow-horizontal subsurface flow combined constructed wetland enhanced denitrification system of the present invention sequentially includes a non-powered automatic water inlet device 8, a tidal flow constructed wetland bed, a non-powered automatic drainage device 2 and a horizontal subsurface flow constructed wetland bed.

[0048] The non-powered automatic water inlet device 8 is a water storage device provided with a siphon water inlet pipe 9 . The siphon water inlet pipe 9 is an inverted "U"-shaped pipe, which has a water inlet arranged inside the water storage device, a water discharge outlet arranged outside the water storage device, and a top. The water inlet of the siphon water inlet pipe 9 is flush with the water inlet stop liquid level 11, and the top of the siphon water inlet...

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Abstract

The invention belongs to the technical field of sewage treatment and specifically relates to a method for enhanced nitrogen removal of a tidal flow-horizontal subsurface flow hybrid constructed wetland and a system thereof. The system orderly comprises a non-powered automatic water intake device (8), a tidal-flow constructed wetland bed, a non-powered automatic water drainage device (2) and a horizontal subsurface-flow constructed wetland bed. The tidal-flow constructed wetland which is high in ammonia nitrogen oxidation effect and the horizontal subsurface-flow constructed wetland which is excellent in nitrate reduction capability are rationally combined into one system by thoroughly utilizing the characteristics of the aerobic environment of the former and the anaerobic environment of the latter; therefore, conditions are created for thorough nitration / denitrification; and simultaneously, a horizontal subsurface-flow wetland slow-release carbon source enhanced region (15) and a backflow well (19) are arranged in the horizontal subsurface-flow wetland bed, so that enhanced removal of total nitrogen in the sewage can be realized and secondary pollution on the carbon source is avoided at the same time.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method and a system for strengthening denitrification in a tidal flow-horizontal subsurface flow combined constructed wetland. Background technique [0002] In recent years, with the rapid development of the economy and the continuous improvement of people's living standards, the amount of sewage discharge has also continued to increase, making my country's water eutrophication and water quality deterioration increasingly serious. At present, my country's sewage treatment mainly relies on the traditional centralized water treatment process. Although the technology and process have become increasingly mature and perfect, they are facing the problem of high construction and operation costs. Many economically underdeveloped areas simply cannot afford large-scale water treatment. Sewage treatment plants or many established sewage treatment plants are idle due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F3/30
CPCY02W10/10
Inventor 吴树彪董仁杰
Owner CHINA AGRI UNIV
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