Bidirectional seepage biological detention pond of internal water storage column

Abstract

The invention discloses a bidirectional seepage biological detention pond of an internal water storage column. The bidirectional seepage biological detention pond comprises a detention pond main body and an external pond body, wherein the detention pond main body is internally and successively provided with a first water storage area, a soil layer, a grit layer, a gravel layer and a composite reverse osmosis layer, the grit layer is internally provided with a water collection pipe, the internal water storage column is arranged in the detention pond main body, the internal water storage column comprises a water storage column shell, a cavity is formed in the water storage column shell, the bottom in the cavity is filled with a filler layer, a plurality of water distribution branch pipes are circumferentially arranged on the bottom of the water storage column shell, the first water storage area is provided with a first overflow opening, the first water storage area enables rainy water to overflow into a second water storage area arranged in the external pond body by virtue of the first overflow opening, and the detention pond main body is arranged in the external pond body. By adopting the internal water storage column, an anaerobic environment on the bottom of the detention pond filler layer can be ensured in a drought period; and the composite reverse osmosis layer can enable the water to continuously flow out from the bottom water collection pipe in the drought period, and a bottom dead water zone can be avoided.

Description

technical field [0001] The invention relates to a two-way seepage bioretention pond with an inner water storage column, and belongs to the field of environment. Background technique [0002] In recent years, China's environmental problems have continued to deteriorate. Due to the extensive use of concrete and asphalt pavements, the impermeability of the ground has increased sharply, resulting in urban waterlogging problems that have seriously affected the normal life and travel of Chinese residents. Property security has laid a serious hidden danger. In order to solve this problem, my country has issued a number of relevant policies and regulations in recent years to vigorously develop the construction of sponge cities. As an integral part of the construction of sponge cities, bioretention ponds have gradually become one of the mainstream technologies and facilities for flood detention and pollution removal in modern urban and rural areas. [0003] After the concept of bio...

AI Technical Summary

Problems solved by technology

However, due to the high degree of urbanization in China, there are not many available depressions. Therefore, it is necessary to save land resources as much as possible in the implementation of detention ponds, but this will reduce the water storage capacity of the detention ponds and reduce the retention. The flood retention effect of the pond

At the same time, due to the large amount of pore water evaporation at the bottom of the traditional detention tank structure under long-term drought, the anaerobic environment at the bottom is destroyed. A large number of denitrifying bacteria die during the drought period, and the substances produced by bacterial cracking will be integrated into the influent of the next rainfall. In the process, the effluent of the first rainfall after the drought period will become smelly, and the nitrogen removal rate will become negative, which seriously affects the pollution control effect of the detention pond.

[0004] For example, the patent (application number: 201420025661.5): a bioretention pond that enhances the nitrogen removal effect in storm runoff. The idea of ​​this patent is novel, but because the backflow attachment in it can only work normally during the seepage process generated by a rainfall , in the subsequent drought state, there will be no rainwater discharged from the outlet pipe, and a stagnant water area will be formed at the bottom. The saturation of the anaerobic area will be destroyed in the drought state, and a large number of denitrifying bacteria will die, which will affect the processing capacity of the next rainfall.

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