The main objective of this experimental investigation was CH4 recovery from biogas generated in municipal and wastewater treatment plant. The polysulfone hollow fiber membrane was prepared in order to investigate the permeation properties of CH4 and CO2. Permeability of CO2 in Polysulfone membrane was 11-fold higher than of CH4 gas. A membrane pilot plant for upgrading biogas was constructed and operated at a municipal wastewater treatment plant. The raw biogas contained 66 ~ 68 Vol % CH4, the balance being mainly CO2. The effect of the operating pressure of feed and permeate side and feed flowrate on CH4 recovery concentration and efficiency were investigated with double stage membrane pilot plant. The CH4 concentration in the retentate stream was raised in these tests to 93 Vol % CH4.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 중공사막
  2.2. 기체 투과 실험 및 단위막의 성능평가
  2.3. 막분리 Pilot Plant의 제작 및 운전
 3. 결과 및 고찰
  3.1. CO2와 CH4 기체에 대한 투과 실험
  3.2. 모의가스를 이용한 단위막 성능평가 결과
  3.3. 막분리 Pilot Plant의 성능평가 결과
 4. 결 론
 참 고 문 헌

• 황철원((주)코아에프앤티) | Cheol-Won Hwang (COA F&T Corporation)
• 정창훈((주)코아에프앤티) | Chang-Hun Jeong (COA F&T Corporation) Corresponding Author