A combined treatment system for farmland non-point source pollution with renewable zeolite ecological ditches

Abstract

The invention discloses an ecological ditch combined treatment system of agricultural field surface source pollution reproducible zeolite. The ecological ditch combined treatment system comprises an agricultural field and a ditch in the agriculture field, wherein a pressing cover is arranged on the top of two side walls of the ditch; cobbles or fiber layers are paved at the bottom of the ditch; concrete impermeable building blocks with hexagon holes in the middle are arranged on the surfaces of the cobbles or the fiber layers and two side walls of the ditch; the holes of the impermeable building blocks are filled with vegetation; zeolite piles are arranged at intervals on the surfaces of the concrete impermeable building blocks in the length direction of the ditch; agricultural field water drainage holes are respectively formed in two sides of the pressing cover of the ditch between every two zeolite piles. By adopting the ecological ditch combined treatment system, natural zeolite can be regenerated, and a part of nutrient components in sewage can be re-conveyed into the agricultural field and absorbed by plants, so that the purposes of environmental friendliness, energy conservation, small occupation area and convenience in construction are achieved.

Description

technical field [0001] The invention belongs to the technical fields of agricultural sewage treatment and environmental protection, and in particular relates to a combined treatment system for farmland non-point source pollution and renewable zeolite ecological ditches. Background technique [0002] With the rapid development of the economy, environmental problems are becoming more and more serious, which have a bad impact on the daily life of residents. Among them, the water pollution of Taihu Lake is a prominent one. There are three main sources of pollutants discharged into Taihu Lake, including industrial pollution, agricultural pollution and domestic pollution. Agricultural non-point source pollution mainly comes from the input of a large amount of agrochemicals. According to statistics, the annual average amount of chemical fertilizer application per hectare of cultivated land in the Taihu Lake Basin (converted to pure amount) has increased from 24.4 kg in 1979 to 66.7...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of farmland non-point source pollution. Considering the shortcomings of traditional ecological ditch system, such as large area, long construction time, limited adsorption capacity of natural zeolite, difficult regeneration and future development direction, the combination of ecological ditch and natural zeolite It provides a beautiful, small footprint, convenient construction, and a renewable zeolite ecological ditch combination treatment system that integrates the functions of sewage transportation and interception. It can not only regenerate natural zeolite, but also retransmit part of the nutrients in sewage to In the farmland, it is absorbed by plants to achieve the purpose of environmental protection and energy saving

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