Development and Application of Liquid-Film-Forming Apparatus in Cultivation Pond

Abstract

 In this study, using a Liquid-Film-Forming Apparatus(LFFA) was applied as a Novel Oxygen Supply device in the cultivation pond, in order to compare energy consumption with the mechanical surface aerators. The result showed that the energy consumption of LFFA decreased 1.6 times in comparison to the mechanical surface aerators. Moreover, the effect of the LFFA performance on the habitat of tilapia was also investigated. The gently flow rate was obtained by this equipment, so there is preferential survival rate for tilapia fry. However DO was decreased, resulted that the growth rate of tilapia was slower than in the conventional method. It is considered that hot air was supplied in the pond due to air pump was operated continuously. While the temperature was risen, decrease of oxygen solubility was taken into account in this study.