Lab of WasteWastewater Eng Dept of Env Eng

<폐기물공학> 유기성폐기물의 혐기성소화 처리기술 제주대학교 교수 허 목 Lab. of Waste&Wastewater Eng. , Dept. of Env. Eng. , Cheju National University.

1. 2 혐기성소화의 원리 Hydrolysis(k 1) Acidification(k 2) Particulate Organics Complex Soluble Org. Carbohydrates, Proteins, Lipids Sugars, Amino acids, Fatty acids Mathanization(k 3 ) Volatile Fatty Biogas Acids (VFAs) Ethanol, Acetic acid, Propionic acid, Butyric acid, Valeric acid, Caproic acid, etc. CH 4, CO 2 H 2 S, NH 3 etc. Microorganisms Reaction rate Food waste Methane former k 1 >> k 2 >> k 3 Sewage sludge k 1 << k 2 << k 3 Acid former

1. 4 기질의 종류 및 메탄가스 발생량 혐기성소화 기질 구분 TS content < 5. 0 % 6~15% >15% Type of Substrate Wastewaters & Wastes Digestion Process Low Solid - Paper mill wastewater Alcohol wastewater Crops manufacturing wastewater Other agro-industrial wastewater WAD Medium Solid - Manures Slaughterhouse waste Municipal sewage sludge Different agro-industrial wastes WAD - Organic fraction of municipal solid waste (OFMSW) - Plant biomass - Crop residues - Household waste DAD High Solid WAD: Wet Anaerobic Digestion, DAD: Dry Anaerobic Digestion

1. 4 기질의 종류 및 메탄가스 발생량 유기성 폐기물의 메탄 발생량 Organic Wastes Manures - Cow - Swine - Poultry Agro-Industrial wastes - Sugarbeet Tomato Orange Brewer’s grain - Sorghum Methane Yield (m 3 CH 4/kg VS) 0. 252 -0. 348 0. 252 -0. 323 0. 320 -0. 348 0. 285 -0. 330 0. 310 -0. 390 0. 370 0. 320 0. 330 0. 310 0. 390 Organic Wastes Municipal solid waste (MSW) - OFMSW - Yard wastes - Paper waste - Sewage sludge - European food waste - Korean food waste Methane Yield (m 3 CH 4/kg VS) 0. 140 -0. 564 0. 401 -0. 489 0. 140 -0. 209 0. 215 -0. 369 0. 225 -0. 320 0. 321 -0. 540 0. 356 -0. 471

국내외 통합소화 적용 현황 Country Process (Temp. ) Types of waste Sweden Bigadan (WD 38℃) Manure, OIW, OHW Denmark Kruger (WD 35℃) Sweden Bigadan (WD 38℃) ? Germany (WD 38℃) Finland Vaasa (WD 38℃) MSW, Digester volume(m 3) Capacity (ton/year) Gas yield (m 3/day) 4, 500 73, 000 8 -9, 000 ? 62, 000 2, 400 2, 250 44, 000 3 -4, 000 38, 690 5, 300 1, 500 40, 000 4, 000 SS Manure, OIW SS, OIW, OHW S, MSW S 대구 신천하수처리장, 부산 수영하수처리장, Korea (WD 35 -38℃) FW, SS 경남 밀양하수처리장, 울산 용연하수처리장 Manure 강원 속초하수처리장, 파주 축분혼합처리장 WD: Wet Digestion, OIW: Organic Industrial Waste, OHW: Organic Household Waste, SS: Sewage Sludge MSW: Municipal Solid Waste, FW: Food Waste

3. 3 실증 혐기성소화 공정 운영 현황 2상 혐기성소화 공정 Food waste Steam boiler Biogas storage Process water Electric generator Leachate Sludge storage Hopper Separato r/Crusher Mixing tank Gravity separator Inert materials Landfill/ Incineration Acid reactor Process water Methane reactor To WWTP Screw press Dewater Discharge Sludge cake Compost Information Aerobic composting Performances - Plant is located at Paju city, start-up in 1999 - Organic removal: 75~80% (basis VS) - Treatment Capacity: 30 ton/day - Biogas production: 2, 500 m 3/day (CH 4: 65%) - Total solid (TS) in mixing tank: 8 % - Compost production: 2. 0 ton/day (W. C. 45%)

하수병합 혐기성 소화공정 Steam boiler Food waste Sewage STP Process water Biogas storage Electric generator PS WAS Leachate Sludge thickener Hopper Separato r/Crusher Mixing tank Gravity separator Inert materials Landfill/ Incineration Information Existing digester in STP Hydrolysis reactor Process water To STP Dewater Belt or Screw press Discharge Sludge cake Sea dumping , Incineration, Landfill, Reuse Performances - Plant is located at Miryang city, Start-up in 2003 - Organic removal: 50~60% (basis VS) - Treatment Capacity of FW: 20 ton/day - Biogas production: 2, 105 m 3/day - Total solid (TS) in mixing tank: 8. 0% - Methane content of biogas: 65~75%

음식물/축분 혐기성 통합소화 Steam boiler Food waste Biogas storage Electric generator Process water Storage Leachate Manure Sludge storage Hopper Separato r/Crusher Mixing tank Gravity separator Inert materials Landfill/ Incineration Hydrolysis /acid reactor Process water Methane reactor Belt or Screw press Dewater To STP Discharge Sludge cake Compost Information - Plant is located at Paju city, Start-up in 2004 - Treatment Capacity: 80 ton/day (Food waste: 20 ton/day, Manure: 60 ton/day) - Total solid (TS) in mixing tank: 8~12 % Aerobic composting Performances - Organic removal: 60~65% (basis VS) - Biogas production: 4, 800 m 3/day - Methane content of biogas: 65~75% - Compost production: 18 ton/d (W. C. 60%)

IV Flowsheet Biomass Town Project (일본)

Yamada Biomass Town Photo Plant