Automatic backwashing biological filtering pond

Abstract

The invention relates to an automatic backwashing biological filtering pond, which comprises a filtering water tank and is characterized in that: a supporting net is arranged in the filtering water tank; a water flowing seam is reserved between the supporting net and the filtering water tank; a partition plate is arranged in the middle of the filtering water tank; water flowing holes for connecting two ends of the partition plate are formed on the upper side part of the partition plate; both sides of the partition plate are respectively provided with a water inlet end and a water outlet end; a pressurized-water baffle plate is arranged in the middle of the water inlet end; the pressurized-water baffle plate divides the water inlet end into a pressurized-water area and an inverted filter area; the bottom of the pressurized-water area is communicated with the bottom of the inverted filter area through the water flowing seam; a clear water baffle plate is arranged in the middle of the water outlet end; the clear water baffle plate divides the water outlet end into a positive filter area and a clear water area; the bottom of positive filter area is communicated with the bottom of the clear water area through the water flowing seam; a backwashing device is arranged between the clear water area and the pressurized-water area; the backwashing device comprises a backwashing pump arranged in the pressurized-water area; the backwashing pump is communicated with the clear water area through a backwashing pipeline; and a filter is arranged on the backwashing pipeline.

Description

technical field [0001] The invention relates to an automatic backwashing biological filter tank. The device belongs to facility breeding equipment and is mainly used for the treatment of various types of aquatic animal breeding sewage, especially the treatment of high-density, intensive and industrialized freshwater fish breeding sewage in greenhouses and greenhouses, and is also suitable for the purification treatment of other types of sewage. Background technique [0002] Biological filter is a biological treatment structure composed of gravel, plastic or ceramic filler. The sewage is in contact with the microbial film growing on the surface of the filler to purify the sewage. It is an artificial biological treatment technology developed based on the principle of soil self-purification, based on the practice of sewage irrigation, and through the relatively primitive intermittent sand filter and contact filter. In recent years, scientists and engineers and technicians ha...

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In this way, it is troublesome and time-consuming,

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