Ladder-type denitrification device for mountainous city road runoff

Abstract

The invention discloses a ladder-type denitrification device for mountainous city road runoff. The ladder-type denitrification device for mountainous city road runoff device is formed by series connection of a primary treating vice (11) and a secondary treating device (12). The primary treating vice (11) is composed of a by-pass pipeline (1), a first vegetation growth medium layer (2), a first filter layer (2), a first drainage layer (4), a second filter layer (5), a baffle (6), plant plants (8), a water inlet area (9), an intercommunicating hole (10) and a second vegetation growth medium layer (13). The secondary treating device (12) is composed of a third vegetation growth medium layer (14), a third filter layer (16), a second drainage layer (17), a fourth filter layer (18), a baffle (6), a drainage pipe (7), planted plants (8), the intercommunicating hole (10) and a fourth vegetation growth medium layer (15). The ladder-type denitrification device for mountainous city road runoff device has the advantages that short-time and efficient removing of nitrogen concentration of mountainous city storm runoff is achieved, the occupied space of the device is small, the arrangement is flexible, and the ladder-type denitrification device for mountainous city road runoff device is suitable for nitrogen pollution control of the storm runoff of a heavy-grade road surface.

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 T A, Grimm N B, Cole Ekberg M L. Opportunities and challenges for managing nitrogen in ur...

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Problems solved by technology

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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