Shallow-water runway type culture system and method based on bioflocculation reactor

Abstract

The invention discloses a shallow-water runway type culture system and method based on a bioflocculation reactor. The bioflocculation reactor comprises a cylinder, wherein an intermediate partition board (5) is arranged in the cylinder so as to divide the cylinder into a left part and a right part, the volume ratio of the left part to the right part is 1:1, one part serves as a reaction area (6), and the other part serves as a sediment area (7); a water inlet (2) is formed in the upper portion of the reaction area (6), a water outlet (4) is formed in the upper portion of the sediment area (7), and a drain hole (10) is formed in the center of the intermediate partition board, so that mixed liquor in the reaction area and the sediment area fully circulates; a certain gap is reserved between the lower portion of the intermediate partition board (5) and the bottom of the reactor so as to be taken as a mud return opening (12). According to the shallow-water runway type culture system and method based on the bioflocculation reactor, the pollutants such as suspended solid particulate matter, ammonia nitrogen, nitrite and saltpeter in recirculating aquaculture water can be removed synchronously by means of one water treatment unit, no solid-liquid separator is needed, equipment investment is reduced, and water changing frequency is reduced.

Description

technical field [0001] The invention relates to the field of circulating aquaculture water treatment, in particular to a shallow water track-type aquaculture system based on a biological flocculation reactor and a method thereof. Background technique [0002] The circulating aquaculture method can save water and land, and realize high-density intensive farming throughout the year. However, the protein requirement of aquatic animals is significantly higher than that of mammals. Only about 20-30% of the fed protein is converted into fish catches, and most of the N elements cannot be utilized and exist in the aquaculture water. Generally, the carbon and nitrogen in the aquaculture water The ratio (C / N) is lower than 4.0. Recirculating aquaculture water usually first removes most of the suspended particles through a solid-liquid separator, and then uses a nitrification reactor to convert ammonia nitrogen in the water body to nitrite nitrogen through the nitrification of autotro...

AI Technical Summary

Problems solved by technology

Recirculating aquaculture water usually first removes most of the suspended particles through a solid-liquid separator, and then uses a nitrification reactor to convert ammonia nitrogen in the water body to nitrite nitrogen through the nitrification of autotrophic nitrifying bacteria until nitrate nitrogen, but solid-liquid separation It needs to consume a lot of energy and remove a lot of wastewater. Most of the solid-liquid separators currently developed are not stable enough, and the high nitrate nitrogen in the aquaculture water will also have a negative impact on the welfare of fish.

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