Ecological circulation system for treating farmland non-point source pollution

Abstract

The invention discloses an ecological circulation system for treating farmland non-point source pollution. The system comprises a symbiotic farmland, a water collecting tank, an ecological interception ditch, an artificial wetland and an ecological purification pond which communicate in sequence; and the symbiotic farmland comprises an annular outer ridge, an annular inner ridge and a planting field, the planting field is located in a ring of the inner ridge, the inner ridge is located in a ring of the outer ridge, a fish ditch is arranged between the inner ridge and the outer ridge, a fish channel is arranged between the fish ditch and the planting field, and the fish ditch communicates with the water collecting tank. The ecological circulation system adopts the symbiotic farmland to reduce the use of pesticides and fertilizers from the source, and adopts the water collecting tank, the ecological interception ditch, the artificial wetland and the ecological purification pond to further treat sewage in the diffusion process of pollutants, so that the treatment effect of the whole ecological prevention and control system is improved.

Description

Technical field [0001] The present invention relates to the technical field of farmland sewage treatment in a natural environment, and more particularly to an ecological circulatory system for processing farmland source pollution. Background technique [0002] With the continuous development of the rural, agricultural nonpoint source pollution has become a major source of pollution, water pollution, soil pollution, air pollution, agricultural non-point source pollution dispersion, randomness large, complex formation mechanism, widespread pollution, latent lag and strong, difficult to monitor, It is a tricky problem for processing agricultural facial source pollution. Unreasonable use of various pesticides such as chemical fertilizer, pesticides, etc. As the surface is migrated into the river, the water body is severely contaminated, and the nitric compound fertilizer in the soil will occur under the action of microorganisms, and a large amount of nitric oxide, nitrous oxide gas i...

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Problems solved by technology

[0002] With the continuous development of rural areas, agricultural non-point source pollution has become an important source of water pollution, soil pollution, and air pollution. The discharge of agricultural non-point source pollution is scattered, with large randomness, complex formation mechanism, extensive pollution, strong latent lag, and difficult to monitor. Dealing with agricultural non-point source pollution is a tricky problem

The unreasonable and unscientific use of various pesticides such as chemical fertilizers, pesticides and herbicides has resulted in a large amount of toxic and harmful substances remaining in the soil, which flow into rivers through farmland ditches, and the nitrogen, phosphorus and other nutrients enriched in the soil will also As the surface runoff migrates to the river, the water body is seriously polluted. The nitrogen-containing fertilizer in the soil will undergo denitrification under the action of microorganisms, generating a large amount of nitrogen monoxide and nitrous oxide gas, which seriously pollutes the atmosphere.

At the same time, the construction of ditches and hardened roads in the construction of high-standard farmland also accelerate the non-point source pollution of farmland. The ditches are constructed of cement, and the sewage can be discharged into the river soon, which cannot perform ecological functions.

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