Artificial wetland sewage treatment system provided with high-position overflow trough

Abstract

The invention relates to an artificial wetland sewage treatment system provided with a high-position overflow trough, which comprises a bar screen, a water-collecting sedimentation tank, a high-position overflow trough and an artificial wetland, wherein the bar screen is positioned in the front of the water-collecting sedimentation tank, the yield water of the water-collecting sedimentation tank is pumped into the high-position overflow trough by a sewage pump, an overflow port of the high-position overflow trough is positioned above the water inlet end of the artificial wetland, a weir of which an overflow weir is horizontal is arranged 500 millimeters higher than the water surface of the artificial wetland, and the extending width of the weir is less than or equal to the width of the water inlet end of the artificial wetland below the weir. The water forms a waterfall shape when flowing down from the overflow trough, contacts air and obtains oxygen, and simultaneously generates impact and air bubbles when falling into the water surface of the artificial wetland to further improve the dissolution degree of the air and the oxygen. The base material of the artificial wetland comprises sand soil mixture, crushed stone, zeolite, limestone, coal slag, steel slag, blast furnace slag, crushed stone, porcelain granules, melon seed piece and pebble and can be cultivated with mussels, and the water outlet end of the artificial wetland is provided with a water storage tank. The artificial wetland sewage treatment system has a simple structure, and can effectively improve the processing effect of the artificial wetland and the purification degree of the yield water of the artificial wetland.

Description

technical field [0001] The invention relates to a sewage treatment system, in particular to a sewage treatment system based on artificial wetlands, belonging to the field of environmental protection. Background technique [0002] Since 1804, the British first used sedimentation and filtration technology as a centralized water treatment plant. In 1884, the Americans invented the coagulation, sedimentation, filtration, and chlorine disinfection technology, which has been used for 120 years. There are new discoveries and improvements in treatment, but the treatment process of domestic water basically remains the same, essentially no update and breakthrough. However, the water source to be treated has undergone great changes: the water source a hundred years ago was not polluted due to the underdevelopment of industry and agriculture. Over the past few decades, the development of modern industry, especially the sudden and rapid development of the chemical industry, the discharg...

AI Technical Summary

Problems solved by technology

Its disadvantage is that it occupies a large area and is prone to problems such as blockage, so it is not suitable for sewage treatment with high pollution concentration.

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