摘要：Spill discharge and abrupt water temperature rising may result in total dissolved gas (TDG) supersaturation,which can lead to gas bubble disease (GBD) and even cause mortality of fish. Studies on the mitigationmeasures about how to promote the dissipation process of supersaturated TDG are essential for the protectionof fishes. In this paper, the experimental research about the promotion of supersaturated TDG dissipation byusing activated carbon was conducted in static water and stir-induced turbulent water respectively.Supersaturated TDG dissipation processes with different content of activated carbon have been monitoredand the dissipation coefficients of supersaturated TDG under various conditions were obtained. The resultsindicate that the activated carbon can increase the dissipation speed of TDG obviously. The higher theactivated carbon content is, the greater the dissipation coefficient is. It can be concluded that the TDGsupersaturation problem can be mitigated by introducing activated carbon and enhancing water turbulencewhen supersaturated TDG occurs in the fish ponds or fish proliferation stations. This study can providescientific data for the exploration of mitigation measures of supersaturated TDG, which is fundamental forthe protection of fishes..
