Intermittent ecological purification pool suitable for farmland drainage ditch

Abstract

The invention discloses an intermittent ecological purification pool suitable for farmland drainage ditches. The intermittent ecological purification pool suitable for the farmland drainage ditches is characterized by comprising an outer pool, an inner pool, ecological purification tanks, waterlogging drainage gates and a water drainage gate. The purification pool is divided into the outer pool and the inner pool through a cutoff wall; the outer pool is communicated with water a drainage ditch; a lot of ecological purification tanks are distributed in the inner pool; and waterlogging drainage passages are formed between the outer pool and the inner pool; the waterlogging drainage gates are installed at two sides of the water inlet end of the inner pool; the waterlogging drainage gates can control water flow to enter the inner pool or pass through the waterlogging drainage passages; the water drainage gate is installed at the middle of the water outlet end of the inner pool; the water drainage gate can make intermittent opening and closing motions according to preset opening and closing duration time, so that wastewater in the inner pool can be drained after being thoroughly purified in the purification tanks. The intermittent ecological purification pool suitable for the farmland drainage ditches can effectively reduce content of nutrient-rich substances in the farmland drainage and prevent non-point source pollution of the farmland from diffusion toward outside. Besides, the intermittent ecological purification pool has the advantages of small floor space, high purification efficiency, simple manufacture and convenient maintenance, does not prevent farmland waterlogging drainage, and is suitable for application in large areas.

Description

technical field [0001] The invention relates to an intermittent ecological purification pond suitable for farmland drainage ditches, and belongs to the technical field of farmland non-point source control. Background technique [0002] Agricultural non-point source pollution has become one of the important sources of global water pollution, especially nitrogen and phosphorus pollution. Agricultural non-point source pollution has caused groundwater pollution. Excessive nitrate and nitrogen and phosphorus enrichment in surface water have caused water quality in rivers and lakes to deteriorate. The overall deterioration and eutrophication of the environment have caused a series of global water environment management problems such as wetland degradation and red tides. In recent years, in many areas of China, especially in areas with relatively developed agriculture and high economic level, excessive application of chemical fertilizers and spraying of high-toxic and high-residue ...

AI Technical Summary

Problems solved by technology

However, most of the current ecological channel purification methods are to plant aquatic plants or install some purification devices in the existing farmland drainage ditches, such as biological purification boxes, etc., and use the physical and chemical reactions that occur when water flows through the purification device to intercept and reduce pollution. These measures have alleviated the problem of agricultural non-point source pollution to a certain extent. However, during the implementation process, it was found that due to the long and scattered layout of ecological purification devices in drainage ditches, the hydraulic retention time is short, the purification efficiency is low, and During the flood season, the flow capacity of the drainage ditch will be reduced, and it usually needs to be taken out in time, and then put back after the flood season 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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