Combinational processing technique and device of deck radial flow

Abstract

The invention relates to a combinational processing technique of deck radial flow, comprising the following steps: firstly, performing oil removal and sedimentation processing on the collected deck radial flow, then, introducing the processed radial flow to a planting slope, and introducing the radial flow to an artificial wet land for biochemical treatment. The processing device comprises an oil removing tank, a sedimentation tank and the artificial wet land, wherein a water outlet of the oil removing tank is connected with a water inlet of the sedimentation tank; the planting slope is arranged between the sedimentation tank and the artificial wet land; the water outlet of the sedimentation tank is higher than the slope top of the planting slope; and the bottom of the planting slope is opposite to the water inlet of the artificial wet land so that the radial flow flowing down from the planting slope enters from the water inlet of the artificial wet land to the artificial wet land through the bottom of the planting slope. The invention can improve the efficiency of processing the pollution of deck radial flow.

Description

technical field [0001] The invention relates to a bridge deck runoff combined treatment process and a device thereof, which are used for bridge deck runoff treatment, so as to reduce the harm caused by bridge deck runoff pollution to the environment, and belong to the technical field of rainwater runoff treatment. Background technique [0002] A large number of studies at home and abroad have shown that due to factors such as atmospheric subsidence, traffic flow, and road surface roughness, bridge deck rainwater runoff contains a large amount of suspended solids, organic pollutants, nutrient salts, heavy metals, polycyclic aromatic hydrocarbons, and oils. thing. Especially for super-large bridge decks, the traffic flow is larger and the road surface sediments are more, making the bridge deck rainwater runoff pollution more serious. After these pollutants enter the receiving water body, they will affect the self-purification function of the water body and destroy the ecologi...

AI Technical Summary

Problems solved by technology

The former treatment system is composed of a vertical flow artificial wetland unit and a horizontal flow gravel bed. However, this system cannot solve the problems of easy blockage and low treatment efficiency in wetland treatment, especially not conducive to the treatment of initial rainwater; the latter treatment system It consists of pond system and artificial wetland in turn. This method intercepts the initial runoff of urban rainwater below 15mm and enters the treatment system for treatment, but cannot collect and process the rainwater runoff during the entire rainfall process, which is very important for bridge deck runoff treatment across sensitive water bodies. not applicable

In 2005, Shanghai Jiaotong University applied for an integrated system of initial rainwater collection, diversion and ecological purification in the lakeside area. The ecological purification part of the system consists of rainwater storage tanks and artificial wetlands. Poor degreasing ability, which is not conducive to the function of subsequent storage pools and wetlands, easy to clog, and low efficiency in removing heavy metals and other refractory pollutants

In addition, this process does not consider adding oxygenated micro-aeration pretreatment section before wetland treatment to improve the treatment efficiency of constructed wetlands

In 2006, the road surface runoff treatment pool applied by Peng Jianguo, Hunan Provincial Transportation Planning Survey and Design Institute was composed of pretreatment pool, interception cofferdam, connecting pipe and primary treatment pool. Its disadvantage was that the pretreatment pool and primary treatment pool were not well utilized. The connection between the pools, and the ability to retain small particle pollutants is poor

There is no report on combined technology for treating rainwater runoff from bridge decks

Moreover, the existing runoff control process basically consists of single or simply connected processing units, which fail to make full use of the process flow, suffer from many constraints, low treatment efficiency, and poor comprehensive treatment capacity for various pollutants. Poor capacity for large water volume changes, unable to effectively treat runoff pollutants

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