Labyrinth-type ecological purification pool suitable for drainage ditch in farmland

Abstract

The invention discloses a labyrinth-type ecological purification pool suitable for a drainage ditch in a farmland. The labyrinth-type ecological purification pool is characterized by comprising a purification pool, a water separation wall, a purification box, an ecological floating bed, a flood drainage valve and a water outlet channel, wherein the purification pool is communicated with the drainage ditch and is divided into rotary labyrinth-type water flow channels by the water separation wall, so that the hydraulic retention time of agricultural sewage in the purification pool is effectively increased; the flood drainage valve is arranged at the middle of the water separation wall at the inlet of the purification pool, so that the inhibition of the purification pool to flood drainage in the farmland during a flood season can be eliminated; the purification box and the ecological floating bed are respectively arranged at the front segment and rear segment of the water flow channels of the purification pool, so that the two-stage purification treatment to the sewage is carried out. According to the labyrinth-type ecological purification pool, the content of eutrophic materials in farmland drainage can be effectively decreased; the non-point source pollution of the farmland is prevented from being diffused to the outside world. The labyrinth-type ecological purification pool has the advantages of being small in land occupation, high in purification efficiency, free of inhibition to farmland flood drainage, simple to manufacture, convenient to maintain and the like, thereby being suitable for large-area implementation.

Description

technical field [0001] The invention relates to a labyrinth ecological purification pool suitable for farmland drainage ditches, belonging to the technical field of farmland non-point source control. Background technique [0002] Agricultural non-point source pollution refers to the sediment, nutrients, pesticides and other pollutants in the farmland entering the water body through farmland surface runoff, soil inflow, farmland drainage and underground seepage during precipitation or irrigation during agricultural production activities. resulting in pollution. These pollutants mainly come from farmland fertilization, pesticides, livestock and poultry, aquaculture and rural residents. Among them, nutrients such as nitrogen and phosphorus and other organic or inorganic pollutants form surface and groundwater bodies through farmland surface runoff and soil seepage. Pollution is the main way of non-point source pollution. At the same time, the loss of nitrogen and phosphorus nu...

AI Technical Summary

Problems solved by technology

However, most of the current ecological channel purification methods are to plant aquatic plants in existing farmland drainage ditches or arrange some purification devices, such as biological purification boxes, etc. These measures reduce the concentration of pollutants in farmland drainage to a certain extent. However, due to the long and scattered layout of the ecological purification device in the drainage ditch, the hydraulic retention time is short, the purification efficiency is low, and the flow capacity of the drainage ditch will be reduced during the flood season, it is usually necessary to take it out in time and put it back after the drainage period is over , the maintenance cost is very high

At present, there are few centralized water purification device systems with low construction and maintenance costs and high purification efficiency for farmland sewage

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