Artificial wetland sewage treatment system

Abstract

The invention discloses an artificial wetland sewage treatment system, which comprises a sedimentation tank, an aeration tank, a microelectrolysis packing drum, a first reaction tank, a second reaction tank, a third reaction tank, a water collection tank and a control system in sequential arrangement from left to right. The first reaction tank, the second reaction tank, the third reaction tank andthe water collection tank are arranged sequentially from left to right; each of the first reaction tank, the second reaction tank and the third reaction tank comprises a heat insulation layer, a gravel packing layer, a mud-free grit packing layer, a zeolite base material layer, a coal ash base material layer, lower partition plates, an anti-permeation membrane and upper partition plates. The artificial wetland sewage treatment system has advantages that quick discharging of precipitates and segmental combined treatment can be realized, and excellent nitrogen and phosphorus removal effects areachieved.

Description

technical field [0001] The invention relates to a sewage treatment system, in particular to a constructed wetland sewage treatment system. Background technique [0002] The amount of sewage discharged in our country is very large every year, and the amount discharged after treatment is not much, which has caused great damage to the environment. All major water systems in our country have produced varying degrees of pollution, and the water environment has seriously deteriorated. Constructed wetlands are artificially designed and constructed by simulating natural wetlands with controllable and engineering characteristics, and are natural ecosystems that treat sewage through physical, chemical and biological interactions with substrates, plants and microorganisms. Constructed wetlands use the triple coordination of physics, chemistry and biology of the complex ecosystem of substrates, plants and microorganisms to achieve efficient purification of wastewater through filtration,...

AI Technical Summary

Problems solved by technology

The existing sewage treatment system cannot effectively degrade the color-causing substances in the water, the removal rate of organic matter in the water is low, the foaming phenomenon of the treated wastewater is serious, the effluent color is deep, the chroma of high-concentration sewage cannot be removed, the COD removal rate is low, and the treatment The recycled water obtained is easy to deteriorate and smelly, and cannot be recycled for a long time. The biodegradability of the water is low, and the COD in the sewage is often discharged beyond the standard.

Moreover, the mud hopper of the sedimentation tank is easy to block, and the mud discharge is not smooth, which affects the continuous process of sedimentation. At the same time, the accumulated sludge is easy to cause secondary pollution to the filtered sewage

The existing vertical flow artificial wetland is mainly used to treat sewage with high ammonia nitrogen content. The sewage flows longitudinally from the surface of the wetland to the bottom of the packing bed, and the volume load is small. Shorter, its denitrification and phosphorus removal effect needs to be further improved, and when the sewage wetland treatment is applied in the north, due to the cold weather and deep permafrost, the wetland is easy to freeze, the operation is unstable, and the treatment efficiency is low in winter.

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