Multi-medium bioretention facility applicable to south red soil region

Abstract

The invention provides a multi-medium bioretention facility applicable to a south red soil region. By aiming at the defects in the prior art and the regional characteristics of the south red soil region, the invention provides a runoff rainwater bioretention facility with the advantages that red soil, zeolite and compost are used as composite media; the structure is simple; the management is convenient; the nitrogen and phosphorus removal effects are good; the seepage coefficient is high. The multi-medium bioretention facility comprises a water inlet pipe, a preposition pool and a bioretention facility main body, wherein the bioretention facility main body sequentially comprises a water storage region, a bark covering layer, a composite medium layer, a filtering sand layer, a gravel water discharging layer and a perforated PVC (polyvinyl chloride) water discharge pipe from top to bottom; waterlogging-resistant and drought-enduring plants such as fleur-de-lis or calami can be planted in the composite medium layer. The regional advantages of the red soil region and the optimization combination of multiple media are used; the efficient purification on contaminants such as nitrogen and phosphorus in the runoff rainwater can be realized; the facility design is simple and flexible; the applicability is high.

Description

technical field [0001] The invention relates to a runoff rainwater treatment facility, which belongs to the field of environmental protection. Background technique [0002] Urbanization is a major trend of social and economic development in the world today, and the improvement of its level is an important symbol to measure a country's economic development and modern civilization level. However, with the improvement of the level of urbanization, while improving the material living conditions of human beings, it has also brought serious hydrological and water quality problems to the city. [0003] In order to alleviate various environmental problems brought about by urbanization, the Ministry of Housing and Urban-Rural Development issued the "Technical Guidelines for Sponge City Construction - Construction of Rainwater System for Low-impact Development (Trial)" in November 2014, requiring all regions to promote urbanization in the process of urbanization. And apply the low-im...

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Problems solved by technology

Among them, bioretention facilities are a widely used technology in low-impact development. At present, some experts and scholars have applied for patents on bioretention facilities. For example, Yu Xuesong invented a simple bioretention facility for treating runoff rainwater (Publication No. : CN 104652596A), although the invention is simple, it is not targeted, and is not suitable for the promotion of bioretention facilities in specific places. However, Fu Dafang and others announced the invention of a bioretention facility suitable for runoff rainwater in rural areas in southern Jiangsu ( Publication number: CN105236587 A), although the invention has a certain pertinence, but the invention needs a certain hydraulic retention time, which is not conducive to the regulation of the amount of runoff rainwater

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