10404 水圏環境改善に向けたマイクロバブルの基本特性の解明について(環境問題と伝熱工学(1),OS.10 環境問題と伝熱工学)

Abstract

This study focuses on the improvement of hydrosphere environment for firefly using micro bubble. The fundamental characteristics of micro bubble are investigated toward the depollution of water in hydrosphere environment for firefly. A series of measurements of micro bubble are carried out with changing flow rates of air and water. After generating micro bubbles, the particle size and the number density are measured. At the same time, the transient change of DO value and pH value are measured. It is realized that the effect of water flow rate on the physical characteristics of micro bubble is larger than that of air flow rate. In case of cavitation method, the water with micro bubbles is maintained neutrality. In case of gas-liquid mixing shear method, the water with micro bubbles is slightly alkalified. The value of DO significantly increases after generating micro bubbles.