The composting characteristics of BM sludge and the control sludge were compared. Feasibility of using coffee groundsas a bulking agent was examined, along with sawdust. It was observed that composting of BM sludge had a faster rateof reaction than with the control sludge, and higher temperatures were reached. When using coffee grounds as a bulkingagent, the caffeine in the coffee seemed to absorb the odors, allowing a composting with almost no odors. Moreover,when coffee grounds used as the bulking agent, total organic matter content increased by approximately 17% over sawdust,while total nitrogen increased by 49%, and available phosphorus by approximately 3%.

I. 서 론
 II. 연구방법
  1. 재료 및 방법
 III. 결과 및 고찰
  1. 온도변화
  2. 수분변화
  3. pH 변화
  4. C/N비 변화
  5. 악취분석
  6. 퇴비 품질 검증
 IV. 결 론
 References

• 하신영(한국해양대학교 환경공학과) | Shin Young Ha
• 김인수(한국해양대학교 환경공학과) | In Soo Kim Corresponding author