System for farmland surface source sewage collection and storage applicable to rainy area and reforming method

Abstract

The invention discloses a system for farmland surface source sewage collection and storage applicable to a rainy area and a reforming method. The system comprises a water collecting ditch system, a sand sediment well, a flow diversion well, an initial rain pond, an ecological pond and a drainage ecological ditch which are successively communicated with one another along a water flow direction, wherein rainwater discharged from farmland is collected by the water collecting ditch system; after settleable muddy sand is removed by the sand sediment well, an initial runoff is separated from a laterrunoff by the flow diversion well, and the initial runoff and the later runoff are respectively discharged into the initial rain pond and the ecological pond; and the rainwater purified by the ecological pond is discharged into the drainage ecological ditch, further purified and then discharged into a nearby water system. Decontamination and flow diversion are automatically carried out through the flow diversion well, and the initial runoff with a high concentration of pollutants and the later runoff with a low concentration of pollutants are stored and reused, so as to reduce the amount of afertilizer used at the source, reuse resources, reduce both the amount of water and the concentration of pollutants, and reduce the discharge of pollutants. Meanwhile, economic plants and fishes areharvested, so that the system has certain economic benefits.

Description

technical field [0001] The invention relates to a system for collecting and storing sewage and a reforming method, in particular to a system for collecting and storing non-point source sewage from farmland in rainy areas and a reforming method. Background technique [0002] In the past 20 years, in order to ensure the continuous growth of the output of agricultural products, the amount of agricultural inputs such as pesticides and chemical fertilizers has also been increasing, and the amount applied far exceeds the needs of plant growth. Studies have shown that agricultural non-point source pollution has become the main source of water pollution in my country, and the pollution loads of chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) in agricultural non-point sources accounted for 43.7% and 57.2% of the water body pollution load respectively. % and 67.4%, of which farmland pollution is the main contribution of agricultural non-point source pollutio...

AI Technical Summary

Problems solved by technology

In order to meet the water requirements of farmland, the farmland is equipped with a complete irrigation and drainage ditch system, but some of the ditch layout is unreasonable, resulting in incomplete collection of farmland runoff and poor drainage, resulting in overflow phenomenon. maintenance, while hardened ditches do not require maintenance, but have poor ability to intercept pollutants; in addition, in order to make full use of rainwater resources and avoid dry seasons without water, farmers usually dig some ponds to collect farmland runoff and store rainwater. When irrigation is needed, nearby water supply can be provided, but when it rains, the runoff from farmland is mixed with clean and dirty water, and after exceeding the volume of the pond, it is directly discharged into the water body to cause pollution

[0009] At present, based on the transformation of the ditch and pond system in the rainy areas in southern my country, the system and method for automatically cleaning and diverting farmland runoff and storing it for reuse have not yet been reported.

Images