Using Impinging Stream to Kill Algae, Fungi and Bacteria in Cooling Water of Thermal Power Plants

The growth of living organism like algae, fungi and bacteria in the cooling-water system of thermal power plants may cause biological fouling. In this paper, a novel method using impinging stream was proposed to kill algae, fungi and bacteria in cooling water of thermal power plants. Using yeast cells as an example, the method of yeast cell disruption by a self-designed vertical impinging stream reactor was introduced, and the effects of impinging speed, impinging time and adding medium quantity on the ratio of cell disruption were investigated. The experimental results show that under the conditions of 1200 r/min of motor speed, 7 h of impinging time and 200 g of adding agent, the ratio of cell disruption can reach 75.8% by the vertical impinging streams reactor. This method is expected to play an important role in cell disruption with hydraulic power, and also to be beneficial to further develop the theory of liquid-continuous impinging streams.