Zero-energy-consumption sewage treatment system and method for constructed wetlands

Abstract

The invention discloses a zero-energy-consumption sewage treatment system and method for constructed wetlands. The system consists of a sewage pre-treatment system, an automatic siphon system, a constructed wetland purification system and a water collection system, wherein the sewage pre-treatment system comprises a three-squared septic-tank and a sewage siphon pool which is connected with the three-squared septic-tank through a pipeline; the automatic siphon system is arranged in the sewage siphon pool; the constructed wetland purification system is connected with the automatic siphon system; the water collection system is connected with the constructed wetland purification system through a pipeline; the constructed wetland purification system is an ecological system consisting of a substrate layer, plants, microorganisms and a water body and sequentially comprises a root layer, a water distribution layer, a substrate layer, a water collection layer and an anti-seepage layer from top to bottom. The system combines sewage treatment and wetland plants, automatically runs by virtue of the gravity generated by liquid level difference, is stable and reliable in treatment process, low in running cost and strong in nitrogen and phosphorus removing capability, facilitates breathing exchange of underground air, has a good treatment effect, and does not have sludge discharge.

Description

technical field [0001] The invention relates to an artificial wetland sewage treatment system and method, which is suitable for sewage treatment in residential areas such as villages, villas, and resorts, and belongs to the technical field of sewage treatment. Background technique [0002] With the continuous improvement of rural areas and the development of resort tourism, the domestic sewage treatment of scattered residential areas far away from the city has attracted more and more attention. Due to the relatively scattered areas and the complex and changeable terrain of the countryside, it is difficult to establish a centralized pipe network collection system and a large sewage treatment plant for sewage treatment. Generally, decentralized sewage treatment is adopted. At present, the processes commonly used in decentralized sewage treatment mainly include the oxidation ditch process of the activated sludge process, the delayed aeration process, the sequencing batch activ...

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Problems solved by technology

However, compared with the sewage treatment in big cities, the main problems faced by the sewage treatment in scattered residential areas are: ① The equipment is not running smoothly, and the water output is difficult to meet the standard; ② Relatively expensive construction costs; ③ Compared with rural living standards, the operating costs are higher; ④ Lack of special personnel on duty, low level of operation and maintenance; ⑤ Improper sludge suction treatment and disposal

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