full scale demonstration of energy...
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FULL SCALE DEMONSTRATION OF ENERGY
POSITIVE SEWAGE TREATMENT PLANT
CONCEPTS TOWARDS MARKET PENETRATION
Funded bythe Horizon 2020
Framework Programmeof the European Union
Grant agreement No. 641661
YOUR FLUSH, OUR ENERGY
Stefansdottir & Dora
Veolia Water Technologies - AnoxKaldnes
170705 & POWERSTEP
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Mainstream nitrogen removal through a two-stage MBBR
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
• Moving bed biofilm reactor (MBBR)
• Nitrogen removal
• ANITA Mox
• 2-stage concept
• Questions
Agenda
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
AnoxKaldnes MBBR technology
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• Microorganisms in the wastewaterdegrade organic matter (COD) nitrogen and phosphorus
• MBBR (Moving Bed Biofilm Reactor)
• Biological treatment unit based on biofilm principle
• ”Carriers” with a protected surfacewhere the biofilm can grow
• Compact solution with specializedorganisms efficient degradation
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
What is a biofilm?
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A biofilm is an aggregate of microorganisms (such as bacteria and micro animals) growing on a solid surface.
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
In the MBBR reactor
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Aerobic reactor Anoxic reactor
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
• Small footprint
• Robust biofilm
• Flexible reactor design
• Easy upgrade of existing plants
• Easy to operate and control
• No sludge return needed in most applications
Benifits of MBBR
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
Carriers
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
Nitrification and denitrification
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
Anammox and deammonification
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
• Desired:• Ammonium oxidizing bacteria (AOB)
• Anammox bacteria
• Deammonification:
• 𝑵𝑯𝟒+ + 𝟏. 𝟑𝟐𝑵𝑶𝟐
− + 0.66𝐻𝐶𝑂3− + 0.13𝐻+ →
𝟏. 𝟎𝟐𝑵𝟐 + 0.26𝑁𝑂3− + 0.66𝐶𝐻2𝑂0.5𝑁0.15 + 2.03𝐻2𝑂
• Unwanted:• Nitrite oxidazing bacteria (NOB)
Bacteria groups
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
Different options for ANITA™Mox
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
ANITA™Mox sidestream
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Stable and robust
Low OPEX + C-footprint :
- 60% O2 / no COD dosing / 1.4-1.7 kWh/kgNrem / N2O < 0.5%
Efficient aeration control
Continuous aeration no mixer / low N2O
Keep NO3 < 11% no NOB (MBBR & IFAS)
N-removal performances :
MBBR = >1 kgNrem/m3.d (Sidestream)
IFAS = 2-3 kgNrem/m3.d (Sidestream)
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
Mainstream nitritation - anammox
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• Key challenges:
Lower temperature
Lower concentration
Maintain high activity of ammonium oxidazingbacteria (AOB)
Suppress nitrite oxidizing bacteria (NOB)
Maintain high activity of anammox bacteria
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
2-stage principals
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
The concept is innovative because it’s ability to give high extraction of carbon for biogas production, nitrogen removal with low energy requirement and compact footprint and to omit or at least dramatically decrease the requirement for external carbon source.
POWERSTEP
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
Overall picture
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N-reduction (no COD)COD-reduction Energy positive
Energy from biogas
Z-MBBR
(nitritation)
ANITA Mox
(anoxic)
NH4 NO2 NH4 + NO2 N2
High rate AS (2016)8
Hydrotech Discfilter (2017)
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 64166118
Plant Design – Sjölunda WWTP (Sweden)
4 x 50 m3 MBBRs
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
Biofilm control – Z carrier
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1
2
3 4
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
Nitritation – Anammox
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Z 200
Z 400
• The first reactor optimized for AOB biofilm
• Aerated continuously / intermittent• Mechanically mixed• Optimal conditions are [NH4]=[NO2]
and low/no [NO3]
• The second reactor optimized for anammox biofilm
• Anoxic• Mechanically mixed
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
Advanced control strategy
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POWERSTEP is funded under the European Union Horizon 2020 Framework Programme.
Grant Agreement No. 641661
Acknowledgement
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POWERSTEP is an innovation action project supported by
the European Union under the Horizon 2020 Framework
Programme.
Contract no. 641661
Duration: 1/07/15 – 30/06/18
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FULL SCALE DEMONSTRATION OF ENERGY
POSITIVE SEWAGE TREATMENT PLANT
CONCEPTS TOWARDS MARKET PENETRATION
Funded bythe Horizon 2020
Framework Programmeof the European Union
Grant agreement Nr. 641661
www.powerstep.eu
Stefansdottir & Dora
Veolia Water Technologies - AnoxKaldnes