Experimental facility for fish excrement crushed particle size distribution rule

Abstract

The invention discloses an experimental facility for a fish excrement crushed particle size distribution rule. The experimental facility for the fish excrement crushed particle size distribution rulecomprises a crushing device and a screening device, wherein the crushing device comprises a hollow crushing column body and an air pump; a through hole is formed in the bottom part of the crushing column body; the air pump is fixed to the bottom part of the crushing column body; the output end of the air pump communicates with the through hole; a sample tap is arranged on the bottom part of the crushing column body; the screening device comprises a hollow screening column body and multiple sieves with different hole diameters; a water inlet is formed in the top part of the screening column body and communicates with the sample tap through a guide pipe; a water outlet is formed in the bottom part of the screening column body; the multiple sieves are fixed into the screening column body andare sequentially and uniformly arranged from the water inlet end to the water outlet end of the screening column body according to the hole diameters from large to small. The experimental facility provided by the invention can be used for conveniently and accurately measuring the fish excrement crushed particle size distribution rule.

Description

technical field [0001] The invention relates to the technical field of aquaculture engineering, and more specifically relates to an experimental device for the particle size distribution rule of broken fish feces. Background technique [0002] Due to the increase in global demand for aquatic products, the decline in total catch, the shortage of water resources, and the strengthening of environmental supervision, the aquaculture industry has developed rapidly. The recirculating aquaculture system (RAS) has the advantages of controllability, environmental protection, and high efficiency, and has become one of the main directions for the development of the aquaculture industry in the future. Maintaining good water quality is the basis of a recirculating aquaculture system, and solid particles are the source of all pollution in the system, of which feces account for about 60% of the total solid particles. Therefore, the characteristics of fecal pellets are closely related to th...

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Problems solved by technology

[0003] At present, when researching on the recirculating aquaculture system, it mainly focuses on the research and development of new devices, new feed, and research on biological filtration, and even related toxicology research, but does not take feces, the main source of water pollution, as the research object. Concentration point

In addition, when studying the crushing characteristics of fecal particles, there is a lack of laboratory equipment that can simulate the turbulent flow in the recirculating aquaculture system for the crushing process of feces

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