Investigation of TSS, oxygen, Carbon Dioxide, EC and pH in Rainbow trout Recirculation Aquaculture System

In this research, high level of TSS as one of the most problems in RAS (Recirculation Aquaculture System) of Rainbow trout's culture is investigated. Other physical factors of water such as CO2, O2, EC and pH were measured as well. For this reason, 5 typical farms were selected and they were similar in design and construction, production method and consumed meal. In commercial farms, other those remaining Suspended Solids methods, use from chemical method, but this method is not applicable in these sites. Research carried out in period of 6 months and 3 stages (in cycle of two month). Efficiency of removing lipid from system was recognized be investigation of lipid amount of suspended solids. One way ANOVA that carried out between five sites in difference periods, showed that the significant differences (P<0.05). Finally, the results indicated that chemical removing method (with these conditions) is not performed in RAS of Rainbow trout.