Abstract: Hydraulic projects in south China often suffer from the biofouling hazards of limnoperna fortunei which adheres to the surface of structures in high-density, changing the function of structure buildings and affecting the safe operation of hydraulic projects. Through researching the mortality characteristics of limnoperna fortunei under conditions of drying, high water temperature, ultrasound wave, and electric current, we discuss the feasibility of removing limnoperna fortunei using physical methods. Results revealed that limnoperna fortune died three days after being in dehydration condition at 28 ℃; and 10 hours in high temperature (44 ℃) ; when the water temperature is higher than 55 ℃, limnoperna fortunei died instantly contacting with water. Ultrasonic wave and high pressure electric current in water could also kill larva and adult limnoperna fortune effectively. Among the four methods, dehydration and high temperature are the most effective, while ultrasonic wave and electric current are of good prevention effect.

Key words: limnoperna fortunei, biofouling, physical removing method, dehydrated and dried, high water temperature, ultrasonic wave, electric current