Research on the dissipation framework and dissipation coefficient prediction model of the supersaturated dissolved gas in solid media containing water

Abstract

Supersaturation of dissolved gas in water will cause fish to suffer from gas bubble diseases and even death. Therefore, it is imperative to illustrate the dissipation process of dissolved gas and then seek measures to remit the negative effects of dissolved gas supersaturation on fish. Generally, adding solid media (SM) to water has proven to be an effective and economical way to remove supersaturated dissolved gas from aquaculture water. While, the supersaturated dissolved gas dissipation framework in solid media containing water was still unclear. In this paper, combined with laboratory experiments and research available in the literature, the dissipation framework of dissolved gas was proposed along with the calculation of the liquidgas interfacial transfer mass, solid wall adsorption mass, porous media adsorption mass, and inner dissipation mass. The solid wall adsorption coefficient was found to follow a power function of the contact angle, and the porous adsorption coefficient logarithmically increased with the specific surface area. It was found that the inner dissipation coefficient exponentially increased with increasing total dissipation coefficient. Utilizing an approximation algorithm method, a model for the prediction of the dissipation coefficient was established. The research reported in this paper could contribute to enriching the research field of supersaturated dissolved dissipation and is significant for ecological and environmental protection.