Renewable energy resources from foodwaste have attracted significant interest and, consequently, many alternatives are considered for large-scale biogas treatment processes and small-scale onsite drying processes (heat source: electricity, gas, and dried foodwaste by-product). The pre-treatment process for foodwaste consists of the following sequential steps: collection, transportation, shredding, segregation, and dehydration. After this pre-treatment, the dried foodwaste by-product is recycled into (among others) animal feed, fertilizer/compost or biomass solid fuel. In addition, the leachate?liquid generated by squeezing the foodwaste is used for bio-gasification, achieved through an Anaerobic Digestion (AD) process associated with a sewage co-digestion treatment. In this study, the operation cost and greenhouse gas (GHG) emissions of an improved and simplified small-scale onsite drying treatment are compared with those of a large-scale biogas treatment. The pre-treatment can be improved and simplified via this drying treatment. Through this treatment, operationcost reductions of 45.4%, 50.5%, and 89.6% are achieved when electricity, liquified natural gas (LNG), and biomass solid fuel (dried foodwaste by-product), respectively, are employed as drying heat sources. Furthermore, if the annual amount of foodwaste (5 million ton) is recycled into biomass solid fuel, then significant reductions (7.5 million tCO2-e per annum) in GHG emissions can be realized. Therefore, this study demonstrates that improvement and simplification of the smallscale drying process (i) reduces the operation cost as well as GHG emission levels (to levels lower than those achieved via the large-scale biogas treatment process) and (ii) offers a practical solution for foodwaste treatment and a renewable energy resource.

Abstract
 I. 서 론
 II. 이 론
  1. 음식물류폐기물 대규모 자원화(바이오가스화) 최종처리 공정
  2. 음식물류폐기물 대규모 자원화(바이오가스화) 최종처리 공정의 운영비용
  3. 음식물류폐기물 대규모 자원화(바이오가스화) 최종처리 공정의 온실가스 배출량
 III. 연구방법
  1. 전기 및 가스 열원 건조
  2. 건조부산물 열원 건조
 IV. 결과 및 고찰
  1. 음식물류폐기물 건조처리방식별 운영비용 비교
  2. 음식물류폐기물 건조처리방식별 온실가스 배출량 비교
 V. 결 론
 References

• 이재희((주)가이아) | Jaehee Lee (Gaia Corporation) Corresponding author
• 최장욱((주)가이아) | Jangwook Choi (Gaia Corporation)
• 최신묵((주)가이아) | Shinmook Choi (Gaia Corporation)