Efficient economic subtropical rural domestic sewage purification constructed wetland vegetation system

Abstract

The invention provides an efficient economic subtropical rural domestic sewage purification constructed wetland vegetation system, which comprises a wetland body, wherein a first vegetation region, asecond vegetation region, a filtering pool, a third vegetation region, a purification pool and a water collection pool are arranged in the wetland body; the first vegetation region and the second vegetation region are respectively communicated with the filtering pool; the filtering pool is communicated with the third vegetation region; the third vegetation region is communicated with the purification pool; the purification pool is communicated with the water collection pool; a water control device is arranged at the front end of water flow of the first vegetation region and the second vegetation region; a myriophyllum elatinoides region and a lythrum salicaria region are respectively arranged in each of the first vegetation region, the second vegetation region and the third vegetation region; a harvesting device is arranged between the first vegetation region and the second vegetation region. The constructed wetland domestic sewage treatment effect is improved; the water purification efficiency is improved. Through treatment, the COD content, the ammonia nitrogen content and the total phosphorus content are greatly reduced; the economic value is high; the income of peasants can beincreased; a sustainable ecological economic system is formed; the system is particularly suitable for rural domestic sewage treatment projects.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an efficient and economical subtropical rural domestic sewage purification artificial wetland plant system. Background technique [0002] Plants are the backbone and core of the constructed wetland ecosystem, and are of great significance to the ability to purify sewage in constructed wetlands. In addition to the adsorption, enrichment, and fixation functions of plants themselves for pollutants, their roots also provide growth space for microorganisms, and symbiotic with microorganisms to stimulate their growth and promote the decomposition of organic matter. However, subtropical plants often enter a state of hibernation in winter or even wither and die, which not only affects the water purification effect of artificial wetlands in winter, but also causes secondary pollution and blockage due to the decay of dead plants in wetlands. In addition, rural sewage is characterized by di...

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Problems solved by technology

However, subtropical plants often go into hibernation or even wither and die in winter, which not only affects the water purification effect of the constructed wetland in winter, but also causes secondary pollution and blockage due to the decay of dead plants in the wetland

In addition, rural sewage is characterized by dispersion, nutrients and elements. Small-scale constructed wetlands can effectively and conveniently purify rural domestic sewage. However, due to the simple emphasis on ecological benefits and no economic benefits, farmers lack the initiative to participate in management and protection. The driving force is that in the absence of continuous investment in management and protection in rural areas, the constructed wetlands lack effective management and protection after completion, and most of them are abandoned or in poor operating condition.

Moreover, wetland plants absorb nutrients, often due to untimely harvesting, excessive plant biomass forms canopy, affects photosynthesis, and slows down water purification efficiency

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