Ecological slope protection type sewage land infiltration system and ecological slope protection type sewage land infiltration method

Abstract

The invention relates to an ecological slope protection type sewage land infiltration system which comprises a grid pond (2), an anaerobic hydrolyzing pond (4) and a stepped land infiltration unit which are sequentially arranged along the gradient of a sloping field from top to bottom, wherein the grid pond (2) is communicated with a ditch (1); the stepped land infiltration unit comprises multilevel slope protection infiltration beds (5); filter materials (7) are filled in the slope protection infiltration beds (5); hygrophyte communities (9) are cultivated on the slope protection infiltration beds (5); a modal conversion assembly (6) used for controlling infiltration speed, waterpower retention time, a filtering layer internal environment and an effluent water mode is arranged between adjacent slope protection infiltration beds (5). The ecological slope protection type sewage land infiltration system disclosed by the invention tolerates the rural sewage quality water flow impact, is difficult to block due to high reaeration capacity, intensifies the denitrification and dephosphorization effect, is green, energy-saving, economic and practicable and has excellent water conservancy and ecology value.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an ecological slope protection type sewage land infiltration system and its infiltration method applied to rural non-point source pollution control and centralized sewage treatment in hilly and mountainous areas or other suitable sewage treatment . Background technique [0002] my country began to carry out centralized treatment of sewage point source pollution in the 1980s. After 30 years of development and improvement, my country's sewage point source pollution has been basically controlled, especially in cities and industrial areas. However, in contrast, the water quality of rivers and lakes in my country has remained unsatisfactory in the past ten years. A large amount of money and manpower have been spent on the treatment of various polluted water bodies, but there is still no lasting and obvious effect. The root cause lies in the weakness of non-point source pollut...

AI Technical Summary

Problems solved by technology

Land infiltration mainly includes slow infiltration system, fast infiltration system, surface overflow system, constructed wetland system and underground infiltration system, etc. Among them, fast infiltration system and underground infiltration system are more commonly used, and the former is economical, applicable and resistant to hydraulic load The capacity is outstanding, but it faces the limitation of low processing efficiency; the latter has high processing efficiency and strong adaptability to environmental conditions, but it faces the problems of clogging, hypoxia and aging failure of filter materials

Similarly, the commonly used land infiltration treatment technology in my country often faces shortcomings including filter blockage, infrastructure maintenance costs, high energy consumption in operation, and poor environmental landscape effects.

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