Occurrence of fine particles in an industrial recirculating mariculture system for marine fish farming of two species
To clarify the removal effects of an industrial circulating water treatment system on fine particulate matter in water,dynamic changes in the mass,composition,and particle size distribution of fine particulate matter during the industrial circulating water culture of Takifugu rubripes and Cynoglossus semilaevis were studied.The results showed that the concentration of fine particles in the aquaculture ponds of T.rubripes and C.semilaevis was stable at about 20 mg·L-1 based on an industrial circulating water treatment process using an arc sieve,foam separator,and biological filter.The content of fine particles in the water increased significantly after feeding;the proportion of organic matter in the fine particles reached more than 90%,indicating that the increase in fine particles in the water was caused by feeding.The particle size of fine particles was mainly distributed within 60-170 nm in the T.rubripes culture pond water and 95-420 nm in the C.semilaevis culture pond water.After the effluent of the aquaculture pond was treated using the water treatment system,the particle size of the fine particles retained in the water was mainly between 95 nm and 110 nm,indicating that the fine particles with a particle size of 60-95 nm and greater than 110 nm in the recirculating aquaculture system can be effectively removed.
万方数据
维普
