System and method for efficiently intercepting and purifying nitrogen and phosphorus in rural domestic sewage

Abstract

The invention discloses a system and a method for efficiently intercepting nitrogen and phosphorus in rural domestic sewage and purifying water. The system comprises a primary filter tank, a primary ecological tank, a secondary ecological tank and an interception tank which are sequentially communicated from the upper part, wherein a water inlet pipe is arranged at the lower part of the primary filter tank, a coarse sand layer, a fine sand layer and an active particle layer are sequentially arranged in the primary filter tank from bottom to top, pore plates are arranged in the primary ecological tank and the secondary ecological tank, and different types of economic plants are planted in the primary ecological tank and the secondary ecological tank; a soil layer, an interception layer, a quartz sand layer and an activated carbon layer are sequentially arranged in the interception pond from top to bottom, aquatic plants are planted in the soil layer, and a drainage pipe is arranged on the lower portion of the interception pond. By adopting the water purification system and the water purification method, total nitrogen and total phosphorus in the sewage can be effectively removed, sothat the purified water body meets the discharge standard.

Description

Technical field [0001] The invention belongs to the technical field of sewage treatment, and specifically relates to a water purification system and a water purification method for efficiently intercepting nitrogen and phosphorus in rural domestic sewage. Background technique [0002] As the country attaches importance to point source pollution caused by industrial sewage discharge, agricultural non-point source pollution and rural domestic sewage pollution have gradually become the main source of eutrophication of river water bodies. The high nitrogen and phosphorus content in the water body causes a large number of algae to grow, causing a large number of aquatic plants and fish to die. Rural domestic sewage is the sewage produced by washing, bathing, cooking in the kitchen, feces and washing of households in villages and towns. Rural domestic sewage has the characteristics of wide dispersion, multiple sources, rapid growth, complex sewage composition, and large changes in wat...

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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a water purification system and water purification method for efficiently intercepting nitrogen and phosphorus in rural domestic sewage. The water purification system and water purification method can effectively solve the problems existing in existing water purification methods. The removal efficiency of total nitrogen and total phosphorus in sewage is low, and the total nitrogen and total phosphorus in purified water cannot meet the discharge standards.

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