화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Clean Technology, Vol.25, No.3, 223-230, September, 2019
DOI10.7464/ksct.2019.25.3.223  Export Citation
음식물류 폐기물 특성 및 메탄 발생가능량 평가
Estimation of Characteristics and Methane Production Rate of Food Waste
이민규, 김 경1, 신현곤2, 배기환3, 김충곤4, 박준석†
  • 강원대학교 지구환경시스템공학과, 25913 강원도 삼척시 중앙로 346
  • 1안양대학교 환경에너지공학과, 14028 경기도 안양시 만안구 삼덕로 37번길 22
  • 2신한대학교 에너지환경공학과, 11340 경기도 동두천시 벌마들로 40번길 30
  • 3(주)도화엔지니어링 플랜트설계1팀, 06178 서울 강남구 삼성로 438
  • 4고등기술연구원, 17180 경기도 용인시 처인구 백암면 고안로 51번길 175-28
Min-Kyu Lee, Kyung Kim1, Hyun-Gon Shin2, Ki-Hwan Bae3, Choong-Gon Kim4, and Joon-Seok Park†
  • Department of Earth & Environmental Engineering, Kangwon National University, 346 Joongang-ro, Samcheok-si, Gangwon-do 25913, Korea
  • 1Department of Environmental Engineering, Anyang University, 22, Samdeok-ro 37 beon-gil, Anyang-si, Gyeonggi-do 14028, Korea
  • 2Department of Energy & Environmental Engineering, Shinhan University, 30, Beolmadeul-ro 40 beon-gil, Dongducheon-si, Gyeonggi-do 11340, Korea
  • 3Department of Plant Engineering, Dohwa Engineering Company, LTD., 438 Samseong-ro, Gangnam-gu, Seoul 06178, Korea
  • 4Bio Resource Center, Institute for Advanced Engineering, 175-28, Goan-ro 51 beon-gil, Baegam-myeon, Choin-gu, Yongin-si, Gyeonggi-do 17180, Korea
E-mail:
초록
본 연구에서는 강원도 5개 지자체에서 발생된 음식물류 폐기물의 특성을 분석하고 메탄가스 발생량을 평가하였다. 시 료는 2017년 7월과 9월에 걸쳐 총 2회 채취하였다. 메탄가스 발생가능량을 평가하기 위하여 BMP (biochemical Methane potential) 시험과 원소조성을 이용한 계산방법을 이용하였다. 음식물류 폐기물의 겉보기밀도는 평균 0.758 ~ 0.850 g cm-3, pH는 4.29 ~ 4.75이었다. 물리적 조성 중 주성분은 채소류가 56.43 ~ 72.81%로 가장 높았고, 과일류는 5.31 ~ 8.95%, 곡물류는 1.60 ~ 18.73%, 어육류는 4.47 ~ 12.11%, 여액은 1.76 ~ 3.64%이었다. 평균 수분함량은 69.30 ~ 75.87%, 가연분함량은 22.50 ~ 27.98%, 회분함량은 1.63 ~ 2.48%를 나타내었다. 또한 BOD5는 17,690.3 ~ 33,154.9 mg L-1, CODCr은 106,212.3 ~ 128,695.5 mg L-1, 그리고 CODMn은 51,266.1 ~ 63,426.3 mg L-1의 범위를 보였고 NaCl 함량은 0.81 ~ 1.17%의 범위를 나타내었다. 원소분석 결과 C, H, O, N, S 함량은 각각 44.87 ~ 48.16%, 7.12 ~ 7.57%, 40.13 ~ 43.78%, 3.22 ~ 4.14%, 그리고 0.00 ~ 0.02%를 나타내었다. 음식물류 폐기물의 VS 단위질량당 메탄수율을 살펴보면 BMP 시험에 의한 메탄가스 발생누적량(0.303 ~ 0.354 mCH4 3 kgVS-1)은 원소조성과 생분해율을 반영하여 예측한 결과(0.294 ~ 0.352 mCH4 3kgVS -1)와 큰 차이가 없었다.
This research was performed to evaluate the characteristics of food waste from 5 areas in Gangwon Province, Korea and to predict the CH4 gas production rate. Food wastes were sampled in July and September, 2017. The amount of methane gas generation was evaluated through the biochemical methane potential (BMP) test and a calculation method using chemical composition. Average bulk density and pH of the food wastes were in the range of 0.758 ~ 0.850 g cm-3 and 4.29 ~ 4.75, respectively. By physical composition, vegetables were the highest with 56.43 ~ 72.81% with fruits recording 5.31 ~ 8.95%, cereals 1.60 ~ 18.73%, fish and meat 4.47 ~ 12.11%, and filtrate 1.76 ~ 3.64%. The average water content was 69.30 ~ 75.87%, and VS and ash content were 22.50 ~ 27.98% and 1.63 ~ 2.48%, respectively. In addition, BOD5, CODCr, and CODMn were in the ranges of 17,690.3 ~ 33,154.9 mg L-1, 106,212.3 ~ 128,695.5 mg L-1, and 51,266.1 ~ 63,426.3 mg L-1, respectively. The NaCl content ranged from 0.81 to 1.17%. The results of elemental analysis showed that the contents of C, H, O, N, and S were 44.87 ~ 48.1%, 7.12 ~ 7.57%, 40.13 ~ 43.78%, 3.22 ~ 4.14%, and 0.00 ~ 0.02%, respectively. In a comparison of the methane production yield per VS mass of food waste, there was no significant difference between the cumulative amount (0.303 ~ 0.354 mCH4 3 kgVS -1) by the BMP test and the theoretical amount (0.294 ~ 0.352 mCH4 3 kgVS -1) calculated by chemical composition.
Keywords:Food waste;Methane;BMP test;Methane production yield;Chemical composition
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