Three-stage sewage treatment system of constructed wetland

Abstract

The invention discloses a three-stage sewage treatment system of a constructed wetland. The system comprises a mud scraping vehicle, a water inlet, a mudapron, a mud outlet, a mud scraping board, an active filter screen, a sedimentation tank, an anaerobic pool, a turbine exhaust fan, air holes, an aeration tank, a ventilating hole, a control valve, a first gravel packing layer, a mud-free coarse sand coating layer, a second gravel packing layer, a filter gravel packing layer, water seepage holes, a water outlet pipe, a sealing cover and a sliding rail. The three-stage sewage treatment system has the beneficial effects that the mud scraping vehicle and the scraping board effectively remove sludge and other solid impurities so as to prevent the sludge and the other solid impurities from blocking a running track, and prevent the system from collapsing; the active filter screen effectively adsorbs fine particles in the sewage, and thoroughly performs solid-liquid separation; the air holesguarantee the low-oxygen environment of the anaerobic pool, and enables the oxygen inside the anaerobic pool to be conveniently and quickly extracted, thus increasing the working efficiency; the control valve facilitates the control of the speed and flow volume of water flow, and effectively prevents the hand from slipping during rotation; the filter gravel packing layer enables the treated sewageto be unblocked.

Description

technical field [0001] The invention relates to a sewage treatment system, in particular to a three-stage sewage treatment system for an artificial wetland, which belongs to the technical field of wetland sewage treatment. Background technique [0002] Constructed wetland is a kind of sewage treatment technology, which requires simple instruments and equipment, the system itself does not need additional power, does not need to inject chemicals into the water body, and will not cause secondary pollution. It has the characteristics of low cost, low cost, convenient management and beautiful appearance. , its application prospects are broad, but there are also problems in the application process of constructed wetlands, such as blockage, unstable operation, plant degradation and relatively large area, especially the blockage of constructed wetlands has seriously affected the promotion and application of constructed wetlands, and blockages often The surface layer of the construct...

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Problems solved by technology

[0002] Constructed wetland is a kind of sewage treatment technology, which requires simple instruments and equipment, the system itself does not need additional power, does not need to inject chemicals into the water body, and will not cause secondary pollution. It has the characteristics of low cost, low cost, convenient management and beautiful appearance. , its application prospects are broad, but there are also problems in the application process of constructed wetlands, such as blockage, unstable operation, plant degradation and relatively large area, especially the blockage of constructed wetlands has seriously affected the promotion and application of constructed wetlands, and blockages often The surface layer of the constructed wetland, and the accumulation of organic matter in the surface layer of the constructed wetland is also one of the important reasons for the blockage of the constructed wetland

[0003] Although its application prospect is wide, there are also some problems in its application process. First, solids such as sludge are not easy to separate during the operation of solid-liquid separation, which is likely to cause subsequent secondary pollution. Second, the existing artificial The wetland three-stage sewage treatment system cannot guarantee a low-oxygen or anaerobic environment during the anaerobic treatment process, and cannot properly treat some substances in the sewage. Third, the existing constructed wetland three-stage sewage treatment system discharges In the process of treated sewage, it is easy to cause unstable operation and impurities are not removed

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