The mechanism of micro-bubble generation with a pump is not clarified yet, so the design of water treatment systems with a micro-bubble generating pump is based on trial and error methods. This study tried to explain clearly quantitative relationships of experimental micro-bubble concentration (Cair) of continuous operation tests with a micro-bubble generating pump and theoretical air solubility. Operation parameters for the tests were discharge pressure (Pg), water (Qw0) and air (q0) flow rates, orifice diameter (DO), and retention time (t). The experimental micro-bubble concentrations (Cair) at 4.8 atm of discharge pressure (Pg) were in the range of 21.04 to 25.29 mL/L. When the retention time (t) by changing the pipe line length (LP) increased from 1.22 to 6.77s, the experimental micro-bubble concentrations (Cair) increased from 25.86 to 30.78 mL air/L water linearly. The dissolved and dispersed micro-bubble concentrations (Cair) are approximately 4 times more than the theoretical air solubility.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 미세기포 발생펌프
  2.2. 흡입공기량/미세기포 발생량 산정
 3. 결과 및 고찰
  3.1. 토출압력(Pg), 유입수 유량(Qw0) 및 오리피스 구경(DO)의 상관관계
  3.2. 유입유량(Qw) 및 체류시간(t)에 따른 미세기포 농도(Cair)
  3.3. 미세기포 농도 (Cair)와 체류시간 (t)의 상관관계
 4. 결 론
 감사의 글
 REFERENCES

• 매튜스탠리암브로샤(부산가톨릭대학교 환경행정학과, Department of Environmental Administration, Catholic University of Pusan) | Matthew Stanley Ambrosia
• 이창한(부산가톨릭대학교 환경행정학과, Department of Environmental Administration, Catholic University of Pusan) | Chang-Han Lee Corresponding author