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Demo case Rotterdam
NEREUS start conference May 31, 2018 Paula van den Brink, Sigrid Scherrenberg, Tessa Steenbakker
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Contents
6 juni 2018 2
• Background
• Process
• Results
• Planning 2018
• Dissemination
• Conclusions
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Why?
6/6/2018 3
Wastewater
Wastewater
Wastewater
Treatment
Plant
Sludge
Products
NEREUS
Pilot research (demonstration) recovery water, energy, nutrients in urban areas
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Process demo case Rotterdam
6/6/2018 4
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Results - Cellulose as C-source
6 juni 2018 5
• C-source is needed for denitrification
• Shortage in influent purchasing methanol or glycerine
• Large impact on CO2 footprint
• Possible to convert screenings from fine sieves into C-source?
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Results - Cellulose as C-source
6 juni 2018 6
• Proven on 1 liter scale, enzyme selection crucial
• Quality produced C-source ≥ purchased glycerine
• Business case positive for Schiphol WWTP
• Possible CO2 footprint savings: 600 ton/year
• Scale-up to pilot scale in 2018; problem with availability enzyme
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Results - Electrocoagulation
6 juni 2018 7
• Replacement FeCl3 dosing
Less handling of chemicals (safety)
Using electricity should be renewable
Lowering CO2 footprint
• Aluminium/iron electrode
• Optimal process conditions 1 liter scale known
iron
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Results - Electrocoagulation
6 juni 2018 8
• Lab scale reactor Noah Water Solutions tested
• Average COD removal 50% and ortho-phosphate > 90%
(for both iron and aluminium)
• Parameters tested:
flow/residence time
pH influent
conductivity influent
COD influent
• Required current and voltage energy use
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Electrocoagulation produces sludge, 2 treatment
routes are explored:
1. Anaerobic digestion tests
Methane production
Treatment digestate?
Nutrients and metals
2. Pyrolysis/TorWash
Sustainable activated carbon
Oil
Gas
6/6/2018 9
Results - Electrocoagulation
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Results - Nanofiltration
• Selection nanofiltration-membranes NXFiltration (production, selectivity) MexPlorer
• Composition concentrate
6/6/2018 10
• PO43- recovery
Alginate beads
Electrocoagulation effluent
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Results – Algae culture
• Recovery of nitrogen
• Waterless urinal is installed
• Selection algae (brackish water), extremophile
• Reactor system
6/6/2018 11
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Results – Reverse Osmosis
• Water
Irrigation water Uit je Eigen Stad
Cider production Vet & Lazy / Beer production students TU Delft
Monitoring microbiological quality
6/6/2018 12
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Planning 2018
6 juni 2018 13
1. Installation pilots
Electrocoagulation
Nanofiltration
2. Official opening NEREUS pilot Rotterdam on 25 June 2018
3. Setting up critical performance indicators process steps:
Removal and recovery efficiency relevant compounds (e.g. COD, phosphate, ammonium)
Energy use
Use of chemicals
CO2 footprint
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Dissemination
6 juni 2018 14
• Abstracts (international congresses): Aachener Membran Kolloquium, …
• Articles: e.g. cellulose project
• Ups & Downs to observer partners & international partners
• 4 x / year observer meeting
• Meetings international partners + openings other pilots
• LinkedIn & Twitter
• Tours pilot Rotterdam
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Cooperation observer partners
6 juni 2018 15
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Conclusions
6 juni 2018 16
• Enzymatically produced C-source works at least as good as purchased glycerine
• Elektrocoagulation: >90% phosphate and 50% COD removal in lab scale reactor
Alternative for FeCl3 (safety & CO2 footprint)
• Nanofiltration can divide nutrients over separate streams
Possibility to recover phosphate and ammonium separately (instead of struvite)
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Democase Rotterdam
Questions?
6 juni 2018 17
This project has received funding from the Interreg 2 Seas programme 2014- 2020 co-funded by the European Regional Development Fund under subsidy contract No 2S03-011
Official opening NEREUS pilot Rotterdam on 25 June 2018!