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The “Key technologies and modes for industrialized recirculating aquaculture of freshwater fish†was based on the existing factory-based aquaculture facilities. The design concept and method of a plant-based circulating aquaculture system based on material balance were established, and the design of the recirculating aquaculture system was improved. The theoretical level. Developed rapid removal technology of suspended particulates, efficient and stable biofilter technology and dissolved oxygen control technology, and developed low-energy oxygen-free oxygen (LHO) devices, aerosol particle filters, fish pond particulate collection devices, and hydrocyclone separation Devices and other key equipment.
Based on the results of the project, four factory-based recirculating aquaculture demonstration bases have been established. Aquaculture production system water treatment unit volume and culture water volume ratio is lower than 0.25:1, aquaculture water recycling rate is greater than 95%. The yield of gems or tilapia culture exceeds 50 kg/m3, the survival rate exceeds 95%, the feed coefficient is less than 1.5, the operating energy consumption is reduced by more than 20%, and the aquaculture wastewater meets the standard discharge. Du Chenghuan
Freshwater fish factory circulating water technology
Recently, entrusted by the Department of Science and Technology Education of the Ministry of Agriculture, experts from the Chinese Academy of Sciences organized experts to identify and evaluate the results of the “Key Technologies and Models of Recirculating Aquaculture of Freshwater Fish Factory†hosted by the Fisheries Institute in Shanghai.