Cascade denitrification device for mountainous city roads
A channel flow, stepped technology, applied in water/sewage multi-stage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of high technical complexity, long hydraulic retention time, etc. The effect of flexibility, small footprint and easy installation
Inactive Publication Date: 2017-10-03
CHONGQING UNIV OF ARTS & SCI
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Patent document CN101913709A "A Composite Ecological Interception Filler and Preparation Method" proposes a filler for urban rainstorm runoff nitrogen and phosphorus interception, but this technology is mainly aimed at open water bodies such as lakes; patent document CN1446759A "Composite wetland ecological method for nitrogen and phosphorus pollution control and Its system” proposed a control technology for nitrogen pollution in storm runoff, but this technology is relatively complex and has a long hydraulic retention time, which is not suitable for mountainous cities with tight land use.
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[0021] Figure 1-Figure 2 A schematic diagram of the device. Rainfall runoff on the road first flows into the water intake area (9), and the initial runoff passes through the vegetation growth medium layer I (2) to enter the device. When the runoff is too large, the excess runoff is discharged through the bypass pipe (1). The rainfall runoff entering the interior of the device continues to flow downward through the filter layer I (3), drainage layer I (4), and then deflects upwards to flow through the filter layer II (5), through the communication hole (10), and flows into the secondary treatment device ( 12). Since the elevation of the communication hole (10) is higher than that of the drainage layer I (4), a submerged area is formed in the area of the drainage layer I (4) and part of the filter layer I (3) and filter layer II (5), and in the submerged area For denitrification and denitrification, the carbon source required for denitrification is provided by the roots of ...
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Abstract
The patent of the present invention discloses a step-by-step denitrification device for mountainous city roads. The device is composed of a primary processing device (11) and a secondary processing device (12) connected in series; the primary processing device (11) consists of a bypass pipe (1), Vegetation growth medium layer I (2), filter layer I (3), drainage layer I (4), filter layer II (5), baffle (6), planting plants (8), water intake area (9), connection hole (10), vegetation growth medium layer II (13); the secondary treatment device (12) consists of vegetation growth medium layer III (14), filter layer III (16), drainage layer II (17), filter layer IV ( 18), baffle plate (6), drainage pipe (7), planting plant (8), communication hole (10), vegetation growth medium layer IV (15). The advantages of this patent are as follows: the short-term and efficient removal of nitrogen concentration in rainstorm runoff in mountainous cities is realized; the device occupies a small area and is flexible in layout, and it is suitable for the nitrogen pollution control of rainstorm runoff on large-slope road surfaces.
Description
technical field [0001] The patent of the invention belongs to the technical field of environmental protection, and specifically relates to the removal of nitrogen in storm runoff in mountainous cities, and is especially suitable for the removal of dissolved nitrogen in storm runoff on steep road surfaces. Background technique [0002] Water eutrophication is one of the major water environment problems that our country is currently facing, and has become an important bottleneck restricting the development of our national economy. Nitrogen is the primary nutrient limiting factor for the growth of plants, algae and microorganisms, and one of the main driving elements that cause eutrophication in water bodies. Excessive input and enrichment of nitrogen in water often lead to changes in aquatic ecological environments[Collins K A, Lawrence T J , Stander E K, Jontos R J, Kaushal S S, Newcomer TA, Grimm N B, Cole Ekberg M L. Opportunities and challenges for managing nitrogen in urb...
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IPC IPC(8): C02F9/14
Inventor 王书敏李强于慧
Owner CHONGQING UNIV OF ARTS & SCI