To develop various usable water from coal seam gas (CSG) water that needs to be pumped out from coal seams for methane gas production, a feasibility study was carried out, evaluating and analysing a recent report (Coal Seam Gas Water Management Policy 2012) from Queensland State Government in Australia to suggest potential CSG water treatment options for fit-for-purpose usable water production. As CSG water contains intrinsically high salinity-driven total dissolved solid (TDS), bicarbonate, aliphatic carbon, Ca+2, Mg+2 and so on, it was found that appropriate treatment technologies are required to reduce the hardness below 60 mg/L as CaCO3 by setting the reduction rates of Ca+2, Mg+2 and Na+ concentrations, as well as TDS reduction. Also, Along with fiber filtration and membrane separation, an oxidation degradation process was found to be required. Along with salinity reduction, as CSG water contains organic compounds (TOC: 248 mg/L, C6 -C9: <20 mg/L and C10 - C36: <60 mg/L), compounds with relatively high molecular weights (C10 - C36) need to be treated first. Therefore, this study suggests a combined system design with filtration (Reverse osmosis) and oxidation reduction (electrolysis) technologies, offering proper operating conditions to produce fit-for-purpose usable water from CSG water.

Abstract
 1. 서론
 2. 자료 평가 및 기술 예측 방법
  2.1. CSG 와 CSG Water의 회수
  2.2. 대표 수질 평가 및 도입 기술 선정
  2.3. 용도별 수질기준 및 처리기술 예측
  2.4. 단위 반응조 선정 및 병합 시스템 구성
 3. 결과 및 고찰
  3.1. CSG water management policy의 제안 기술 분석
  3.2. 용도별 요구 수질 분석에 의한 처리 기술 예측
  3.3. CSG water의 처리대상 물질 및 처리 기준
  3.4. 도입 가능한 단위공정의 범위
  3.5. 단위공정의 병합에 의한 제거공정 예측
  3.6. 표본 공정의 처리비용 분석 및 평가
 4. 결론
 REFERENCES

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