신재생에너지 Biogas 생산을 위한 음식물류 폐기물의 회분식 혐기성분해 특성 평가 (Biodegradability of Food Waste in Anaerobic Batch Digestion for Production of New and Renewable Energy Biogas)

서지정보

· 발행기관 : 한국폐기물자원순환학회
· 수록지 정보 : 한국폐기물자원순환학회지 / 33권 / 7호 / 699 ~ 709페이지
· 저자명 : 정지현, 강호, 박재규, 한용철, 이준표

초록

Anaerobic mesophilic batch tests of food waste and food waste leachate collected from food waste treatment facilitywere carried out to evaluate their ultimate biodegradability and two distinctive decay rate coefficients (k1 and k2) withtheir corresponding degradable substrate fractions (S1 and S2), respectively. Each 3 liter batch reactor was operated formore than 60 days at substrate to inoculum ratio (S/I) of 0.5 as an initial total volatile solids (TVS) mass basis. Resultof Ultimate biodegradability of 74 ~ 83% for food waste and 85 ~ 90% for food waste leachate were obtained respectively.
The readily biodegradable fraction of 85 ~ 93% (S1) of food waste Biodegradable Volatile Solids (BVS, So) degraded withinthe initial 15 days with a range of of 0.151 ~ 0.168 day−1, whereas the rest slowly biodegradable fraction (S2) of BVSdegraded for more than 53 days with the long term batch decay rate coefficients of 0.009 ~ 0.010 day−1. For the food wasteleachate, the readily biodegradable portion (S1) appeared to be 92 ~ 94% of BVS (So), which degrades with of 0.172 ~ 0.206day−1 for an initial 15 days. Its corresponding long term batch decay rate coefficients were 0.005 ~ 0.009 day−1. It isrecommended that the hydraulic retention times of mesophilic anaerobic digesters be 16 days for the food waste and 15 daysfor the food waste leachate, respectively. However a safety factor should be considered when designing a full scale plant.

영어초록

Anaerobic mesophilic batch tests of food waste and food waste leachate collected from food waste treatment facilitywere carried out to evaluate their ultimate biodegradability and two distinctive decay rate coefficients (k1 and k2) withtheir corresponding degradable substrate fractions (S1 and S2), respectively. Each 3 liter batch reactor was operated formore than 60 days at substrate to inoculum ratio (S/I) of 0.5 as an initial total volatile solids (TVS) mass basis. Resultof Ultimate biodegradability of 74 ~ 83% for food waste and 85 ~ 90% for food waste leachate were obtained respectively.
The readily biodegradable fraction of 85 ~ 93% (S1) of food waste Biodegradable Volatile Solids (BVS, So) degraded withinthe initial 15 days with a range of of 0.151 ~ 0.168 day−1, whereas the rest slowly biodegradable fraction (S2) of BVSdegraded for more than 53 days with the long term batch decay rate coefficients of 0.009 ~ 0.010 day−1. For the food wasteleachate, the readily biodegradable portion (S1) appeared to be 92 ~ 94% of BVS (So), which degrades with of 0.172 ~ 0.206day−1 for an initial 15 days. Its corresponding long term batch decay rate coefficients were 0.005 ~ 0.009 day−1. It isrecommended that the hydraulic retention times of mesophilic anaerobic digesters be 16 days for the food waste and 15 daysfor the food waste leachate, respectively. However a safety factor should be considered when designing a full scale plant.

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