A farmland non-point source pollution ecological soil purification bed

Abstract

The invention discloses an ecological soil purifying bed for agricultural non-point source pollution, and belongs to the field of sewage treatment equipment. The ecological soil purifying bed comprises a filtering purifying layer, a water distributing pipe, a surface sandy soil combined planting layer, an efficient pesticide purifying layer, an efficient nitrogen and phosphorus absorbing purifying filler layer, a gravel water collecting layer, a seepage-proofing layer, a perforating draining pipe and a water discharging area; flow control valves are arranged at a water inlet and a water outlet of the device; the filtering purifying layer is arranged at the head section of the purifying bed and used for removing large granular materials in non-point source streamflow; the surface sandy soil combined planting layer, the efficient pesticide purifying layer, the efficient nitrogen and phosphorus absorbing purifying filler layer and the gravel water collecting layer are distributed in the ecological soil purifying area from top to bottom and used for efficiently removing pesticides, N, P and other pollutants in the non-point source pollution; plants are planted on the surface of the sandy oil combined planting layer; the perforating draining pipe is arranged in the gravel water collecting layer. The ecological soil purifying bed is reasonable in area distribution, compact in structure, convenient to operate, and obvious in treatment effect according to the characteristics of the agricultural non-point source pollution.

Description

technical field [0001] The invention belongs to the field of sewage treatment equipment, and in particular relates to an ecological soil purification bed for farmland non-point source pollution. Background technique [0002] The particle properties, texture and structure of the soil, the thickness, permeability and chemical properties of the soil have a great influence on the treatment capacity and purification effect of the underground infiltration system, because the soil plays a role in physical interception and chemical precipitation for the purification of sewage. , adsorption, redox, complexation and ion exchange, etc., and at the same time provide the necessary environmental conditions for soil microorganisms, the decomposers of pollutants, so that the sewage can be well purified. The ecological soil purification system is similar to the soil underground infiltration system, which degrades and purifies sewage step by step through the material cycle and energy flow of ...

AI Technical Summary

Problems solved by technology

At present, the ecological soil purification system researched in China is mainly to treat domestic sewage, and there are not many for farmland non-point source pollution. For example, the published patent "an automatic reoxygenation domestic sewage ecological soil purification bed" (CN101525200A), "hydrolysis- Stable contact - method for purifying sewage by three-dimensional ecological soil treatment system" (CN1644514A), "an anti-clogging ecological soil sewage treatment device" (CN103274566A), "an ecological soil treatment system for domestic sewage" (CN202717671U), etc., farmland surface source Pollution Pesticide content is high, high nitrogen and phosphorus, directly discharged into the water body destroys the self-purification ability of the water body, causing water environment pollution

Images