The treatment efficiencies of domestic sewage treatment processes were analysed and assessed to suggest and design a suitable technology for coal seam gas (CSG) water treatment. Two sewage treatment plants (S and G in Busan) were selected. The former operates with standard activated sludge and modified Ludzak Ettinger processes while the later uses the combination of A2/O and gravity fiber filtration. For both plants, the concentrations of BOD, CODMn, T-N and T-P were about 5.0, 19.0, 5.0, 11.0 and 1.0 ppm, respectively, which satisfy the discharge standards. Therefore, although sewage treatment processes seems to be applicable for CSG water treatment, additional processes to remove total dissolved solids and ionic compounds (i.e. bicarbonate) need to be introduced to produce fit-for-purpose water resources for beneficial use (in accordance with Water ACT 2013). This, for the CSG treatment process design, it is necessary to align the operating conditions with merging methods of combinable unit technology obtained from sewage treatment processes.

Abstract
 1. 서 론
 2. 연구방법
  2.1. CSG Water의 현황 및 수질분석
  2.2. 표본하수처리장
 3. 결과 및 고찰
  3.1. 수영하수처리장 처리효율
  3.2. 강변하수처리장 처리효율
  3.3. 하수처리공정의 CSG Water의 용수 생산 시스템에대한 적용 가능성
 4. 결 론
 감사의 글
 REFERENCES

• 신춘환(동서대학교 에너지환경공학과, Department of Energy & Environmental Engineering, Dongseo University) | Choon Hwan Shin Corresponding author