Series vertical aerobic and anaerobic combined underground soil infiltration system

Abstract

The invention discloses a series vertical aerobic and anaerobic combined underground soil infiltration system which sequentially comprises a plant layer, a planting soil layer, a water distribution layer, a first soil infiltration layer, a first supporting layer, a second soil infiltration layer and a second supporting layer from top to bottom. A water distribution pipe is arranged in the water distribution layer, a water inlet is formed in the top of the water distribution layer, and a water outlet is formed in the bottom of the second supporting layer; a breather pipe is arranged in the first supporting layer and is communicated with external air; the water distribution layer, the first supporting layer and the second supporting layer all comprise gravel blocks or coarse sand, and the first soil infiltration layer and the second soil infiltration layer both comprise loess. During operation of the system, the characteristics of upper-layer stagnant water migration behaviors in hydrogeology are shown, sewage is subjected to distribution combination of an aerobic environment, an anaerobic environment, the aerobic environment and the anaerobic environment in the vertical seepage direction, the mineralization effect on organic nitrogen is guaranteed, the removal effect on the mineralized nitrogen is also achieved, and the ammonia nitrogen and total nitrogen removal capability is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an underground soil infiltration system connected in series with vertical aerobic and anaerobic combinations. Background technique [0002] For small-flow, decentralized domestic sewage treatment, the underground soil infiltration system has the advantages of good effect, low infrastructure investment and operating costs, and easy management and maintenance. Therefore, it is widely used in domestic sewage treatment in rural towns and remote tourist areas. It has won extra favor, especially in the process of building a new countryside in the loess area of ​​our country. However, in practice, it is also found that its shortcomings are also very obvious, such as large footprint, low COD (chemical oxygen demand) and nitrogen removal rate, etc., especially the low removal rate of ammonia nitrogen is very prominent, and needs to be improved and improved. [0003] ...

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Problems solved by technology

[0005] In order to solve the deficiencies in the prior art, the present invention is inspired by the characteristics of the migration behavior of the upper stagnant water in field hydrogeology, and fully considers the characteristics of organic carbon and nitrogen conversion in the process of sewage treatment, and provides a series vertical well The underground soil infiltration system combined with aerobic and anaerobic solution solves the problem that the existing underground soil infiltration system cannot take into account high operating efficiency, small footprint, and low operation and maintenance costs

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