Constructed wetland sewage treatment system

Abstract

The invention discloses an artificial wetland sewage treatment system which comprises filler areas of an upstream tank body and a downstream tank body, water pipe devices arranged in the filler areasand wetland emergent aquatic plants planted on the surfaces of the filler areas. The upstream tank body and the downstream tank body each comprise a supporting layer, a phosphorus adsorbing layer, a persistent organic pollutant decomposing and converting layer and a nitrogen adsorbing layer, wherein the supporting layer is prepared from gravel, the phosphorus adsorbing layer is prepared from limestone, the persistent organic pollutant decomposing and converting layer is prepared from bamboo carbon loaded nanoiron ceramsite, and the nitrogen adsorbing layer is prepared from zeolite. The artificial wetland sewage treatment system disclosed by the invention can reinforce nitrogen and phosphorus removal and reduce pollution load, achieves the purpose of reinforcing removal of pesticides and antibiotics in non-point source pollution caused by agricultural production and rural area cultivation industry at the same time, improves facility evolving efficiency and guarantees that system outletwater can reach a related high-quality reuse water standard.

Description

technical field [0001] The invention relates to an artificial wetland sewage treatment system, in particular to a multi-bed matrix structure composite vertical flow artificial wetland sewage treatment system. Background technique [0002] Constructed wetlands are generally composed of 5 parts: ① substrate with various water permeability; ② plants suitable for growing in saturated water and anaerobic substrate; ③ water body (water flowing below or above the surface of the substrate); ④ aerobic , facultative or anaerobic microorganisms; ⑤ invertebrates or vertebrates. Constructed wetlands can use natural or artificial pools or trenches, lay an anti-seepage layer on the bottom, and fill a certain depth of soil and fillers to form a filler bed. Wastewater flows in the filler gaps in the bed or on the surface of the bed. Aquatic plants (such as reeds, cattail grass, etc.) with good performance, high survival rate, strong water resistance, long life cycle, beautiful appearance an...

AI Technical Summary

Problems solved by technology

At present, most of the fillers in constructed wetlands are gravels, which have low nitrogen and phosphorus adsorption capacity and poor purification effect.

Although in recent years, high-efficiency adsorption nitrogen and phosphorus fillers have been developed to improve the removal efficiency of nitrogen and phosphorus in constructed wetlands. Matrix fillers have adsorption and removal effects on pesticides and antibiotics, but they cannot effectively degrade pesticides and antibiotics, and the treatment effect is not ideal.

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