Converting a Conventional Plant into an Advanced Anaerobic Digestion Plant

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WEX 2012 The Water and Energy Exchange -
31st January – 2nd February 2012 – Lisbon

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Converting a Conventional Plant into an Advanced Anaerobic Digestion Plant

  1. 1. WEX 2012 The Water and Energy Exchange 31st January – 2nd February 2012 – LisbonChile, Santiago - Mapocho ProjectConverting a Conventional Plant intoan Advanced Anaerobic DigestionPlant. Miguel Angel SANZ Degrémont SA 1
  2. 2. Greater Santiago Wastewater Collectors and Treatment Management Plan 1999 2010 2012Number of 6 15 16WWTPsTreated Flow 0.48 m3/s 14.4 m3/s 17 m3/sRate 1,000Biosolids 0 tons/day 720 tons/day tons/dayPopulation Eq. 180.000 5.520.000 6.050.000treatedCoverage 3% 87% 100% Greater Santiago will be the first South AmericanTotal 613 MUSD 870 MUSD Capital City to reach this target, in only 13 yearsInvestment 2
  3. 3. El Trebal - Mapocho WWTP (Chile) EL TREBAL WWTP Initial stage commissioned in 2001, for a design capacity of 4.4 m3/s (1.600.000 PE) EL TREBAL-MAPOCHO WWTP Extension of 2.2 m3/s and new pretreatment, reaching a 6.6 m3/s capacity, for full coverage of Santiago Wastewater treatment + Detail engineeringCLIENT: AGUAS ANDINAS of extension to 8.8 m3/s + Basic engineering for 11Type of Contract: Design-Built-O&M m3/sCAPEX: 195 MUSD Advanced treatment with Thermal Hydrolysis CAMBIO&M: 4 years with option to 5 additional years + cogenerationTREATMENT: Full production scheduled in March 2012Water: Pretreatment - Primary Settling – Activated O&M contract performed in partnership with Agbar,sludge – Secondary settling -Chlorination for 4 years with option to 5 additional yearsSludge: Thickening – THP + Anaerobic Digestion – Water Treatment Targets:Dewatering BOD5 35 mg/lOthers: Cogeneration SS 35 mg/l Fecal coliforms 1000/100 ml 3
  4. 4. Mapocho WWTP– 2 Phases ExtensionEL TREBAL – 2010 EL TREBAL &(1.6 millions PE) 12 MAPOCHO – 2018 (3.2 millions PE) 8 6.6 4.4 m3/s m3/s 2.2 m3/s m3/s 4 0 2010 2012 2018 2050 El Trebal Mapocho 4
  5. 5. El Trebal-Mapocho WWTP: 8.8 m3/s, 2018 5
  6. 6. Cambi THP 6
  7. 7. Thermal Hydrolysis of Sludge andAnaerobic DigestionThermal Hydrolysis ow viscosity  Allow High Concentration in DigesterHydrolysis  Increase kinetics  Enhances Volatile Matter RemovalThermal Treatment :  Improve Dewaterability Pre-thickened Sludge Hydrolyzed Sludge Digested Sludge Dewatered Sludge BENEFITS − Save digesters − Increase Electricity Production reduction of − Reduce Total Amount of Sludge O&M costs − Improve Digester Stability − Good Opportunity for Thermal Drying in the future 7
  8. 8. Mapocho Sludge Treatment Biological Desulfurization sludge Primary sludge - storage - cogeneration Anaerobic digestion Pre-thickening Thickening Pre-dewatering Strain Press DewateringThermal Hydrolysis (Cambi) Mixing & Lime Final disposal Cooling stabilization Chamber 8
  9. 9. Mapocho: THP Cambi - Digelis™ Turbo January 2012: Commissioning 9
  10. 10. Mapocho WWTP :THP Impact on OPEXThe Cambi-Digelis™ Turbo process allows to:  Reduce the sludge transportation and disposal cost by 27%  Increase the biogas production by 13%  Decrease the polymer consumption for dewatering by 26% 260°C  Electricity Production 2012: 8.7 MWh 450°C 10
  11. 11. Sustainable Developmentand Carbon Footprint 11
  12. 12. WEX 2012 The Water and Energy Exchange 31st January – 2nd February 2012 – Lisbon THANK YOU FOR YOUR ATTENTIONChile, Santiago - Mapocho Project Converting aConventional Plant into an Advanced AnaerobicDigestion Plant. Miguel Angel SANZ Degrémont SA 12

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