Constructed wetland sewage treatment method and system

Abstract

The invention discloses a constructed wetland sewage treatment method and system, belonging to the technical field of water treatment. According to the invention, sewage passes through a plantation layer and then enters into a pool body through a perforating water distributor; after passing through the perforating water distributor, the sewage uniformly enters into a packing layer comprising novel hexagonal composite filling material modules in the pool body, then the sewage is purified by the combined effect of the physical, chemical and biochemical reaction of hexagonal composite filling material modules and microbes of the hexagonal composite filling material module surfaces, and then the purified sewage is discharged out of the pool body from a perforating water collecting pipe. The operation is simple, no power is consumed, and the operation and maintenance costs are greatly saved, thus the whole constructed wetland sewage treatment system can operate efficiently and stably.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a method and system for treating artificial wetland sewage. Background technique [0002] The research on constructed wetlands can be traced back to the 1970s. It was derived from the study of wetlands. It is a kind of artificially constructed and supervised control. This wetland system is composed of soil and fillers to form a filler bed. Wastewater can be Flow in the filler gap of the bed body, and plant aquatic plants with good treatment performance, high survival rate, strong water resistance, long growth cycle, beautiful appearance and economic value on the surface of the bed, forming a unique ecological environment. When it is stabilized, a large number of microorganisms grow on the surface of the filler and in the root system of the plant to form a biofilm. When the sewage flows through, the bulk solids are blocked by the filler and the root system, and the organic...

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Problems solved by technology

[0003] In recent years, with the development of science and technology and interdisciplinary comprehensive utilization, there have been many reports on sewage treatment methods for constructed wetlands at home and abroad, such as the published patent "a sewage treatment method for constructed wetlands" (CN 1O1717151A), This technology sets other treatment units before the constructed wetland system, which increases investment and cost; the published patent "a sewage treatment method based on facultative biochemistry-enhanced constructed wetland" (CN 1O1979348A), this technology increases The facultative biochemical device not only increases investment and consumption, but also occupies a large area; the published patent "A Method for Advanced Treatment of Sewage and Structure of Constructed Wetland" (CN 1O2249496A), this technology adds other treatment structures and is more suitable for artificial Although the structure of the wetland is arranged, although the overall treatment effect can be improved, the utilization of the artificial wetland filler layer is still not sufficient, and the structure is more complicated and the area is larger.

In addition, there are many reports on artificial wetland filling technology, but most of them have the disadvantage that the artificial wetland filling layer is easy to form sewage short flow and dead zone, which reduces the treatment effect.

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