초미세기포를 이용한 저수지 내의 조류 및 원인물질 제어

Abstract

This study evaluated the efficiency of algae control and the recurrence of algae over time using a water treatment system based on the generation of ultra-fine bubbles. As a result of the experiment, the pre-treated water that passed through the VCF pre-treatment system showed a slight chromaticity, but the organic and suspended substances and algae with a size of 10 μm or more were almost removed, and the concentration of COD, T-N, and T-P was reduced by 31%, 36%, and 19%. In the case of the final treated water, chlorophyll-a was reduced by 99.9%, and COD, T-N, and T-P, which are the causative substances of algae, were reduced by 95%, 96% and 94% compared to the raw water. As a result of monitoring the algae reproduction for 5 weeks, it was confirmed that the algae reproduction was controlled to be low for 5 weeks by ultra-fine bubbles, and the algae reproduction progressed after 5 weeks. Since ultra-fine bubbles can exist in water for a long time, if ultra-fine bubbles are continuously supplied to reservoirs or rivers where algae are generated, algae can be controlled eco-friendly without using chemicals. In addition, the water treatment system using ultra-fine bubbles is considered to be a new method to overcome the limitations of the algae removal method, such as eco-friendliness, persistence, and field applicability.