Filter device for livestock and poultry breeding wastewater and method adopting filter device

Abstract

The invention discloses a filter device for livestock and poultry breeding wastewater and a method adopting the filter device. An outer filter screen and an inner filter screen of the filter device are both cylindrical and are tightly attached and nested to form a double-layer filter screen. A backwash device is used for washing filter residues adhered to the top of the double-layer filter screen, multiple circles of filter holes are formed in the outer filter screen and the inner filter screen in a surrounding manner, and overlapping areas of the filter holes in the two layers of filter screens have regular changes when the outer filter screen rotates relative to the inner filter screen; an upper sewage sump is arranged in the inner filter screen and used for collecting the filter residues washed off by the backwash device at the upper part; a water inlet and an upper sewage draining port connected with the upper sewage sump are formed in a first sealing plate; a water collecting tank is arranged below the double-layer filter screen and used for collecting wastewater after filtering. The double-layer filter screen adopting the cylindrical and tightly attached and nested filter screens is used for filtering the livestock and poultry breeding wastewater, so that the size of filterable particles is adjusted, and adaption to fluctuation of the particle size of solids in the livestock and poultry breeding wastewater is realized.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a livestock and poultry breeding wastewater filtering device and method thereof. Background technique [0002] The livestock and poultry breeding industry is an important part of my country's agricultural economy. The environmental pollution caused by its vigorous development is becoming more and more serious, which not only affects economic development, but also endangers ecological security. The feces and wastewater produced by livestock and poultry farms cause serious pollution of surface water, groundwater, soil and ambient air, directly affecting people's health and normal production and life. The discharge of a large amount of livestock and poultry breeding wastewater has become one of the important factors leading to water pollution and eutrophication in my country, which seriously restricts the healthy and sustainable development of the livestock and poultry breeding indust...

AI Technical Summary

Problems solved by technology

[0003] In the process of livestock and poultry wastewater treatment, since the wastewater contains mostly livestock and poultry hair or undigested large particles of lignocellulose, it is not only difficult to be degraded by the subsequent biological treatment process, but also easy to cause blockage of the subsequent treatment unit

[0004] The pore size of conventional filter devices is fixed, but the particle size of solids in livestock and poultry wastewater fluctuates greatly with time, and conventional filter devices are difficult to adapt to

Moreover, the viscosity of the filter residue is not strong enough. Conventional filter cartridge devices cannot take into account the problem that the filter residue cannot reach the highest point, resulting in the accumulation of filter residue at the bottom of the filter cartridge, which results in low efficiency and high energy consumption.

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