Preposed acidification-tide flow polymorphic marsh group sewage treatment system and method

Abstract

The invention provides preposed acidification-tide flow polymorphic marsh group sewage treatment system and method. The treatment system comprises a grit chamber, a preposed acidification sedimentation tank, an overflowing water distributing system and a tide flow polymorphic marsh group, wherein the acidification sedimentation tank and the tide flow polymorphic marsh group system are connected in series to form an integral sewage treatment system. Sewage enters the preposed acidification sedimentation after deposited and filtered by the grit chamber and enters a tide flow polymorphic marsh through the overflow water distributing system for further treatment, thereby the sewage is effectively treated.

Description

Technical field: [0001] The invention belongs to the field of sewage treatment, in particular to a pre-acidification-tidal flow polymorphic wetland group sewage treatment system. Background technique: [0002] With the growth of population, the development of industry, agriculture and urbanization, the discharge of sewage in our country has increased sharply, and the water pollution situation has become increasingly serious. According to statistics, my country's annual sewage discharge is tens of billions of tons, but only 24% of industrial wastewater and 4% of domestic sewage are treated and discharged, and 80% of drinking water sources are polluted. Under the current situation of my country's water shortage, the research and development of various sewage treatment technologies is particularly important. In recent years, as an ecological treatment technology, constructed wetland technology has become the most concerned method in the field of sewage purification, among whic...

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Problems solved by technology

[0003] However, the subsurface flow wetland technology also has the following defects: (1) The internal oxygen environment of the wetland is single, which is not conducive to the smooth occurrence of nitrification and denitrification process, resulting in poor denitrification effect of the wetland

(2) The general wetland filler has low phosphorus removal adsorption capacity, resulting in poor phosphorus removal effect in wetlands

(3) The wetland system handles a large amount of pollutant load, which leads to easy sedimentation and blockage of the wetland bed

(4) Due to the way of wetland water intake and water flow pattern, the utilization of wetland fill is often insufficient

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