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Dara Ghasimi PhD candidate at TU Delft Civil Engineering & Geosciences

66 th Vakantiecursus, TU Delft, January 10, 2014. Potential Role of Thermophilic Digestion in Energy-Neutral Sewage Treatment Plants “ Adaptation Beyond Expectation”. Dara Ghasimi PhD candidate at TU Delft Civil Engineering & Geosciences Sanitary Engineering Section.

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Dara Ghasimi PhD candidate at TU Delft Civil Engineering & Geosciences

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  1. 66thVakantiecursus, TU Delft, January 10, 2014 Potential Role of Thermophilic Digestion in Energy-Neutral Sewage Treatment Plants “Adaptation Beyond Expectation” DaraGhasimi PhD candidate at TU Delft Civil Engineering & Geosciences Sanitary Engineering Section Promoter: Prof. Jules van Lier (TU Delft)Supervisor: Dr. ir.Merle de Kreuk(TU Delft)Supervisor: Dr. ir. Marcel Zandvoort (Waternet)

  2. Application of Fine Sieve For STP Energy Optimization Biogas (Renewable energy) Digester Digestate sludge Expectation • Reduction in aeration energy, less sludge, low transportation cost • Removal efficiency comparable to pre settling tank (removal of inert COD, TS..) • Onsite Energy Production: Energy Neutral STP @ Low Cost!

  3. Automatic Methane Potential Test System (AMPTS) Waterbath & Flasks Gas Volume Measuring Device CO2 Fixing Bottles RT=30 days I/S = 3 & 5 (based on VS)

  4. Inoculum: Non-adapted Seed Sludge HNP WWTP M-35°C DRANCO- (GFT=VFY) T-55°C

  5. Inoculum: 8 months Adapted Seed Sludge M-35°C T-55°C

  6. Inoculum: 18 months Adapted Seed Sludge M-35°C T-55°C M-35°C T-55°C

  7. Inoculum: 18 months Adapted Seed Sludge M-35°C T-55°C M-35°C T-55°C

  8. Conclusion • Short Term Test: Mesophilic Digester More Efficient • Long Term Adaptation: Thermophilic Outcompetes Mesophilic • Thermophilic Digester: • High Loaded; • Less Footprint; • Efficient Digester For Onsite Energy Recovery From FSF!

  9. ??? + !!!

  10. Why I AM DOING THIS RESEARCH? • Dutch Water boards AND STPs agreed to have 20% reduction in Energy Consumption By 2030 • STPs: Energy Neutral or Surplus Energy

  11. Introduction • Cellulose makes up about 30-50% of the SS in the sewage • It mainlyoriginates from the use of toilet paper (10-14 kg/person/year) • Degradation of cellulose in the aeration tank is incomplete andrequiresaeration energy • Cellulose separation efficiency in a primairy clarifier is low (up to 50%; poor settling property fibres)

  12. (Physical-Chemical Characteristics)

  13. Pyrosequencing Results of The Thermophilic and Mesophilic Sludge

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