Aerobic Granular Sludge System
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1 Aerobic Granular Sludge System
2 Aerobic Granular Sludge Definition True microbial biomass (no carrier!) Minimum particle diameter of ~ 0.2 mm (1-2mm optimum size) AGS SVI5 is comparable to SVI30 of typical activated sludge
3 Aerobic Granular Sludge Granule Structure PAO Denitrifiers Nitrifiers Aerobic Anoxic Anaerobic Conventional Activated Sludge Mixed Microbial Community Aerobic Granular Sludge Layered Microbial Community
4 Aerobic Granular Sludge Excellent Settling Properties Increased MLSS Granules 8 g/l or more SVI 5 Flocs 4 g/l SVI 5
5 Granule Formation Selection Mechanisms 1) Hydraulic selection for fast settling particles 2) Biology selection of EPS forming microorganisms PAO / GAO s
6 Operational Description
7 AquaNereda Process Flow Influent Effluent Grit Removal and Screening Pre-EQ (if needed) AGS Reactors Tertiary Filtration and Disinfection (if needed) Side Stream Sludge Thickening Digester
8 AquaNereda Process Cycle
9 Process Characteristics
10 Characteristics Excellent settling properties Up to 75 % smaller footprint Up to 50% energy savings Increased capacity Sustainable robust technology No support media No bulking sludge Chemical savings Source: T.R. Devlin Aerobic Granular Sludge Presentation
11 Process Robustness Robust during less favorable conditions: Salinity fluctuations Chemical spikes ph fluctuations Load variations Activated sludge and granular sludge with shock addition of 5,000 ppm NaCl after 5 min of settling CAS AGS
12 Applications and Scope
13 Ideal Applications Retrofit Applications - Any existing process - Higher flows and loads New construction Limited footprint Plant expansion Upgrade to BNR requirements Industrial plants
14 Existing Installations
15 Nereda Plants Around the World 40 Plants Worldwide Daily average flow (MGD) Peak flow (MGD) Vika, Ede (NL) Cargill, Rotterdam (NL) Fano Fine Foods, Oldenzaal (NL) Smilde, Oosterwolde (NL) STP Gansbaai (RSA) STP Epe (NL) STP Garmerwolde (NL) STP Vroomshoop (NL) STP Dinxperlo (NL) STP Wemmershoek (RSA) STP Frielas, Lisbon (PT) STP Ryki (PL) Westfort Meatproducts, Ijsselstein STP Clonakilty (IRL) STP Carrigtwohill (IRL) STP Deodoro, Rio de Janeiro (BR) STP Jardim Novo, Rio Claro (BR) STP Hartebeestfontein (RSA) STP Kingaroy (AUS) STP Ringsend SBR Retrofit 1 Cell, Dublin (IRL) STP Highworth (UK) STP Cork Lower Harbour (IRL) STP Simpelveld (NL) STP Ringsend Capacity Upgrade, Dublin (IRL) STP Alphach (CH) STP Österröd, Strömstad (Swe) STP Tatu, Limeira (BR) STP São Lourenço, Recife (BR) 1st phase STP São Lourenço, Recife (BR) 2nd phase STP Jaboatão, Recife (BR) 1st phase STP Jaboatão, Recife (BR) 2nd phase STP Jardim São Paulo, Recife (BR) STP Jardim São Paulo, Recife (BR) STP Utrecht (NL) STP Faro-Olhão (PT) Startup
16 Garmerwolde, NL Side-by-Side Operation
17 Garmerwolde, NL Footprint 35% Flow Split 65%
18 Frielas WWTP, Portugal Partial Retrofit 1 of 6 Aeration basins was retrofitted into a Nereda reactor Combined effluent of CAS and AGS meets effluent permit requirement 33% energy savings on aeration alone
19 Epe, Netherlands 2011 Remote Operation / Low TN Average Flow (MGD) Flows Peak Flow (MGD) Parameters Influent Effluent BOD TSS TN - 4 TP Effluent quality is after filtration
20 AquaNereda Demonstration Facility
21 Aerobic Granular Sludge Demonstration Facility Rockford, IL 0.2 MGD AGS Reactors Process Building Filters Blowers
22 Demonstration Facility Rockford, IL MGD AGS Construction of a 0.2 MGD AquaNereda reactor with associated pretreatment, instrumentation and mechanical equipment Sludge Holding AquaNereda Reactor
23 AquaNereda Pilot Plant
24 Aerobic Granular Sludge Pilot Plant
25 Summary
26 AquaNereda Summary AGS reduces footprint, increases capacity and reduces energy Compact, sustainable, robust Achieves BNR and Bio-P removal Over 40 full scale installations worldwide Demo facility and pilot are resources to assist with implementation in the U.S.
27 Questions?
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