Application of Fine Bubbles in Agriculture, Fisheries, and Food Industry

Abstract

The International Organization for Standardization has standardized “fine bubble” for bubbles less than 100 µm diameter. Even when the same amount of gas turns into bubbles, due to its fineness, the number of fine bubbles is much larger than that of easily visible cm-size bubbles. As a result, the total bubble surface area is expanded, and the chemical reaction efficiency at the gas-liquid interface is dramatically improved. If air is contained within, it will increase the amount of dissolved oxygen in the water. For this reason, the use of fine bubbles has been growing in the agriculture and fisheries industries, where dissolved oxygen is essential. For example, it is used for irrigation in the agricultural industry and for densification processes in the fishery industry. In each case, it is utilized to solve problems in the field.