A device and method for removing micro-suspended solids used in freshwater aquaculture systems

Abstract

The invention relates to a tiny suspended matter removal device for a freshwater aquaculture system. One end of a microbubble generator is communicated with external sewage and external ozone, and the other end of the microbubble generator is communicated with a floatation area inside a closed chamber; the floatation area inside the closed chamber is isolated from the upper part of a precipitation area of an inclined pipe through a first vertical partition plate, the bottoms are communicated, a bottom partition plate is downwards inclined from two sides towards the middle parts of the floatation area and the precipitation area of the inclined pipe; an inclined plate screen is arranged on the upper part of the floatation area, a first blowdown pipe with certain downward inclination is arranged at the lower end of the inclined plate screen, and a first backwashing device for washing the inclined plate screen is arranged above the inclined plate screen; a second blowdown pipe is arranged at the lowest position of the bottom partition plate; a second backwashing device is arranged above the bottom partition plate; the precipitation area of the inclined pipe and an overflowing area are isolated through a second vertical partition plate, and a water purification drain pipe is arranged at the bottom of the overflowing area. The tiny suspended matter removal device is simple and convenient to operate, has diversified functions, not only can remove tiny particles of aquatic water body, but also can degrade organic matters, remove ammonia nitrogen and water color, and increase dissolved oxygen.

Description

technical field [0001] The invention relates to a device and method for removing tiny suspended matter in a freshwater aquaculture system, and belongs to the technical field of freshwater aquaculture water purification. Background technique [0002] The main source of solid particles in the recirculating aquaculture system is the feed, and the amount of the feed determines the amount of suspended solids in the system. Fish feces are the manifestation of the total suspended solids in the aquaculture water. A good water quality environment can promote fish growth and reduce the occurrence of diseases. In order to optimize water quality, the circulating water system should effectively and quickly remove these suspended particles, but the current conventional gravity sedimentation and mechanical filtration methods cannot effectively remove fine suspended particles with a particle size below 30um. Sturgeon is the most economical freshwater aquaculture species in the world. Its r...

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Problems solved by technology

[0003] The technical problem to be solved by the invention is: in the existing freshwater recirculating aquaculture system, because the surface tension of freshwater is too small compared to seawater, the application efficiency of the traditional air flotation method in the freshwater aquaculture system is low, resulting in poor removal effect of fine suspended matter. Difference

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