andreas.giesen@rhdhv · covered operation window includes effluent carbonaceous extensive nitrogen...
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Imagine an innovative treatment process that: intensifies treatment up to a factor 4 reduces energy by 30 - 50% is cheaper to construct and operate can be retrofitted into existing treatment plants does not contribute to use of plastics or chemicals meets most stringent effluent requirements enables recovery of valuable biopolymers is easy to operate and proven for any size and climate
Natural way of treating wastewater using aerobic granular sludge with excellent settling properties
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Wastewater treatment with Nereda®
FLOCS
4 g/lSVI5 > SVI30
GRANULES
8 g/l or moreSVI 5 ≈ SVI 30
The scientific challenge to develop Aerobic Granular Sludge was taken up mid 90’s by Delft University of Technology
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Prof. Mark van Loosdrecht
2018 Stockholm Water Prize2012 Lee Kuan Yew Prize
From lab scale experiments to full scale application
History and development
1993 1999 2000 2002 2003 2004 2005 207 2008 213
Breakthrough / launching Nereda®
1st pilot research municipal
Start R&D at Delft University of Technology
Feasibility study carried out by Royal HaskoningDHV
Cooperation Delft with Royal HaskoningDHV (formerly: DHV)
Granule formationstable at lab scale
1st industrialapplication
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Scale up first industrial references2005 cheese products
2006 ready-made food
2007 edible oil
2009 ready-made food
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History and developmentFrom lab scale experiments to full scale application
1993 1999 2000 2002 2003 2004 2005 2007 2008 2011 2012 2013
Start roll out in the Netherlands and worldwide
Demos in RSA and Portugal
Breakthrough / launching Nereda®
1st pilot research municipal
Start R&D at Delft University of Technology
Feasibility study carried out by Royal HaskoningDHV
Cooperation Delft with Royal HaskoningDHV (formerly: DHV)
Granule formationstable at lab scale
1st industrialapplication
National Nereda Development ProgramPublic Private Partnership
Start-up 1st full scale municipal plant in the Netherlands
Scale-up meets world largests SBR tank volume
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More than 70 applications
2005: Vika, The Netherlands, 5,000 p.e.
Today: Ringsend Dublin, IrelandUltimate capacity 2,400,000 p.e.
Growing worldwide Nereda® Community
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Covered operation window includes Wastewater
Temperature: from Sweden to Middle-East (4 – 38 oC) Diluted to concentrated wastewater (160 – 10,000 mg/l COD) Municipal to heavy industry Easy biodegradable to inhibiting Steady load to large fluctuation With or without Primary Clarification Rain/hurricane/typhon/snow events Anaerobic pretreated Salinity fluctuations: from sweet water to sea water toilet flushed
Any type of wastewater suitable for aerobic biological treatment will do
Stability of granule is big plus in operation robustness and operation ease
Considerations for pre, post and sludge treatment similar to activated sludge
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Covered operation window includes Effluent
Carbonaceous Extensive nitrogen removal Full nutrient removal RO-grade after tertiary ultrafiltration
Any type of treatment standard achievable with activated sludge, biofilm-on-carrier and MBR can be obtained
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2 October 2019: opening first biopolymer recovery plant in Zutphen
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Nereda® Granular Activated Sludge• Innovation transformed into an international proven, modern treatment
technology
• Offers interesting new opportunities to upgrade or intensify land-locked treatment plants
• and/or to meet Energy Neutrality, Resource Recovery and Value Recovery
• is likely to replace activated sludge, biofilm-on-carrier and MBR as the new norm for intensified & sustainable treatment
Granular Activated Sludge
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Micro-organisms in the granule
NitrifiersDenitrifiersPhosphate Accumulating Organisms (PAO’s)Glycogen Accumulating Organisms (GAO’s)
AnaerobicAnoxicAerobic
Activated sludge
Courtesy Delft University of Technology
Biopolymer
How to make Granular Activated Sludge?
Operation of Nereda results in stable granulation thanks to Initial uptake of BOD by granules during feeding Growth on adsorbed / stored BOD during aeration Sludge blanket surface wasting of excess sludge Applying selection each cycle to all sludge
activated sludge aerobic granules
Transformation biomass structure
Hydraulic
BiotechSelective wasting slower settling biomass
Selection GAO/PAO EPS
Advantages
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SMALL FOOTPRINTUp to a factor 4 smaller
COST EFFECTIVELower CAPEX & OPEX
EXCELLENT EFFLUENT QUALITY Including biological nutrient removal N/P
SUSTAINABLE30-50% energy savingsNo/minimal chemicals
EASY TO OPERATEAutomated & robust
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Deodoro, Rio de Janeiro – Brazil, 2016
CLIENT BRK Ambiental / Foz Aguas 5
WASTEWATER TYPEMunicipal
NEREDA CAPACITY86,400 m3/day │ 480,000 p.e.
PEAK FLOW6,120 m3/hour
Opened prior to the Olympic Games
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Comparison of footprint
Treating 3x flow< 50% footprint
Nereda plant:360,000 p.e750 l/s
Deodoro old plant:170,000 p.e
210 l/s
Phase wise:3 modules = 750 l/s
4 modules = 1,000 l/s
Ringsend WWTP UpgradeWWTP Load Design: 1.64 million p.e. Current: 1.9 million P.e. Future: 2.4 million p.e
Existing Treatment Screening and Grit Removal Primary Settling Lamella Tanks 24 Sequencing Batch Reactors (2 Tier) UV Disinfection (Bathing Season) Sludge Digestion and Drying
Effluent Discharge Standards Existing:
EU Sensitive waterbody:
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Parameter 95%ile Max.
BOD 25 mg/l 50 mg/l
TSS 35 mg/l 87.5 mg/l
COD 125 mg/l 250 mg/l
Ammonia 18.75 mg/l --
Parameter 95%ile Max.
BOD 25 mg/l 50 mg/l
TSS 35 mg/l 87.5 mg/l
COD 125 mg/l 250 mg/l
TN 10 mg/l Average
TP 1 mg/l Average
Ringsend STP, Dublin
• Upgrade and extent existing plant to 2.4 MPE, 600 MLD DWF, 11.3 m3/s RWF and meeting European Nutrient Removal Performance
• 24 existing SBR tanks, 12 per level, 13,500 m3 each
• Original plan was to operate the plant in carbonaceous mode and construct a deep sea-outfall and dump in sea outside the estuary
• Irish Water selected Nereda for upgrade and extension based on interaction with other endusers and the very significant cost advantages.
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Nereda® Garmerwolde – The Netherlands
CLIENT Water Authority Noorderzijlvest
WASTEWATER TYPEMunicipal
CAPACITY30,000 m3/day │140,000 p.e
PEAK FLOW4,200 m3/hour
START UP2014
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Energy – Garmerwolde
Chemical consumption Garmerwolde
Chemical Unit A/B system Nereda
2014 2015 2016 2014 2015 2016
Fe ton 119 128 119 26 8 0.2
Coagulant ton PEactive 39 22 1.5 - - -
Flocculant ton PEactive 8.4 5 0.6 - - -
PAC l/week 144 199 251 - - -
C-source l/week 715 573 468 - - -
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Comparison of footprint
Treating same flow< 25% footprint
< 50% energy useNo chemicals
Garmerwolde plant140.000 p.e
347 l/s