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IASON – INTELLIGENT ACTIVATED SLUDGE OPERATED BY NANOTECHNOLOGY

IASON – INTELLIGENT ACTIVATED SLUDGE OPERATED BY NANOTECHNOLOGY. Budapest University of Technology and Economics Department of Sanitary & Environmental Engineering. Fleit, E. and Melicz, Z. (BUTE) Zrínyi, M., Filipcsei, G. and László, K. (BUTE) Dékány, I. and Király, Z. (SZTE).

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IASON – INTELLIGENT ACTIVATED SLUDGE OPERATED BY NANOTECHNOLOGY

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  1. IASON – INTELLIGENT ACTIVATED SLUDGE OPERATED BY NANOTECHNOLOGY Budapest University of Technology and Economics Department of Sanitary & Environmental Engineering Fleit, E. and Melicz, Z. (BUTE) Zrínyi, M., Filipcsei, G. and László, K. (BUTE) Dékány, I. and Király, Z. (SZTE)

  2. Problem exposition (colloids vs wastewater treatment) • Do we know enough (from each other)? • State-of-the-art in wastewater treatment • „High-tech low-tech” dilemmas • Hungarian context • One new idea in old environment – IASON • Results • Conclusions • Innovation chain (lessons learned)

  3. Do we have mutual problems? Definitely we do…

  4. A typical colloid problem: foaming and scum (cream) formation (on full scale)

  5. URBAN WATER INFRASTRUCTURE (HUNGARY): UNPRECEDENTED INVESTMENTS % of the total population 100 90 Population supplied by public taps located along streets 80 70 Access to public water supply 60 50 Access to sewerage including population living on sewered areas but not using this service 40 30 20 Access to sewerage 10 0 1950 1955 1960 1965 1970 1975 1980 1985 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002

  6. Wastewater treatment in Hungary- 1990

  7. Wastewater treatment in Hungary - 2003

  8. Wastewater treatment in Hungary- 2015

  9. Hungarian Wastewater Master Plan: strategy with dilemmas • Scheduling (scenarios) • Cost efficiency (taking EU technologies without adoption) • Emissions and water quality impacts

  10. Long-term (but hidden) links between wastewater treatment and colloid sciences • Late lessons from early warnings… • Colloid size substrates (foams, creams, emulsions, etc.) • Colloid size reactants (biofilm, ESP, activated sludge flocs, etc.) • Kinetic and financial problems

  11. Starting point – a key element in biological wastewater treatment remains uncontrolled • Suspended cell bioreactors (activated sludge systems) • Particle size distribution ? • Diffusion limitation ? • Ratio of floc and filament former bacteria ? • Technological functions ?

  12. A novel concept - IASON • I – Intelligent • A – Artificial • S – Sludge • O – Operated by • N - Nanotechnology

  13. An example: the Bardenpho process IASON process control Raw wastewater Treated effluent Anaerobic Anoxic Oxic

  14. Project objectives • Control and design of floc size distribution and settleability (density) • Control of substrate and electron acceptors (O2 and/or NO3) within the floc • Biofilm formation (nitrification/denitrification) • Direct regulation of technological functions in microscopic dimensions by nanotechnology (microreactor development)

  15. Wastewater bacteria on microscopic carrier materials (PVA-PAA/starch) (biofilm development after 1 week)

  16. The first step: immobilization on designed microreactors Immobilization with adsorption Ionic bounds Covalent bounds Cross-linking Matrix entrapment Microcapsulation Combined methods Heterotrophic bacteria (South-Pest WWTP) on PVA-PAA hydrogels (400x)

  17. Growth of selected (technological aims) bacteria on hydrogels Nitrifying bacteria 100x Budapest Sewerage Works

  18. Comparative respirometric experiments (AS and IASON) Cummulative O2 consumption (mgO2) Activated sludge Colonized PVA-PAA days

  19. Nitrification efficency of biomass grown on PVA-PAA gels Nitrification efficiency (%) days

  20. Development of active microreactors 1. day 2. week 3. week

  21. Functioning of autotrophic system (upon 3 weeks of biofilm developmen) mg/l 8,8 8,6 8,4 8,2 8,0 7,8 7,6 7,4 Nyers Tisztított pH NH4-N NO2-N NO3-N oP

  22. IASON - future nanotechnological design objectives Establishment of microscopic size reactors (contolled gradients) Substrate Oxygen Aerobic layer Anaerobic/anoxic layer End-product Solid carrier material (hydrogel)

  23. Conclusions • „Traditional” technologies/pollutants • Changes of wastewater composition (rapid) • New type of pollutants • Conceptual change and novel opportunitie • Nano- and biotechnology • Design of wastewater composition • Professional background (R+D and education)

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