Presentation on theme: "Nitrogen Removal from Yamuna River (India) using MBBR – Pilot Summary"— Presentation transcript:
1 Nitrogen Removal from Yamuna River (India) using MBBR – Pilot Summary IPN-ISRAEL WATER WEEKNitrogen Removal from Yamuna River (India) using MBBR – Pilot SummaryKeren NofPresented by: Ramiro GarzaSeptember 2014
2 IntroductionAqwise TechnologyMaterial and MethodsResults and DiscussionSummary and ConclusionsQuestions
4 River Water Pollution River Water Pollution – How? The problem Due to fast urbanization and industrial growth – without appropriate infrastructure for wastewater treatmentThe problemThreat to Natural Environment and human healthOdor problemsHigh Nitrate –Blue baby syndromeAgriculture sewageIndustrial sewageDomestic sewageDrinking WaterAlgae Bloom
5 Case Study: Surface Water Treatment Municipality of AgraYamuna River, Agra, India163,000 m3/dNeed to provide safe drinking water for population of 2 million peopleCost-efficient surface water treatmentAGAR® MBBR and UF membrane polishingAdaptive to variable loadsRiver Water Treatment - Agra, IndiaSecondary effluent from WWTP’s was discharged into the river for years resulting in elevated levels of soluble pollutants (BOD, TAN and NO3)
9 Moving Bed Biological Reactor MBBR TechnologyFree-Floating polyethylene media (Aqwise Biomass Carriers)Moving Bed Biological ReactorAGAR® MBBR SolutionsSimple, single-through processReduces soluble pollutants with minimal process complexityRequires a significantly smaller footprint
10 Effective surface area Innovation That WorksAqwise Biomass Carriers protect biofilm against abrasion and ensure mass transfer efficiencyRecycled, high-density polyethyleneHighly openexternal design> 650 m2/m3Effective surface areaOptimal oxygen andnutrients transferApplicable for various biological processes
11 Customer Benefits SMALL FOOTPRINT COST EFFICIENT SCALABLE & FLEXIBLE /SMALL FOOTPRINTSuitable for both new applications and existing plant upgrades.COST EFFICIENTRequires minimal civil works, short project life cycle and lower Capex/Opex.SCALABLE & FLEXIBLESmooth upgrade or gradual expansion based on just-in-time investment.DURBLE & STABLEHighly resistant to hydraulic shock loads with short recovery time after toxic loads.LOW MAINTENANCESimple maintenance and low operational costs.ECO FRIENDLYRecycled materials, less land usage, no scenery obstruction and less sludge.
13 Schematic pilot plant flow diagram System DescriptionThe system consists the following treatment unitsPretreatment units: fine screen (5mm) and tube settlerMoving Bed Bio Reactor (MBBR)Ultrafiltration for solids separationChlorinationSchematic pilot plant flow diagram
14 Design Data Influent Characteristics Effluent Requirements Parameter UnitInlet to the MBBRDesign Temperature°C15/30CODmg/l99BOD529TSS34TAN17.95Nitrate as N5.1Nitrite as N0.7Effluent RequirementsParameterUnitValueTANmg/l1.65Nitrate as N9.0
15 Sampling ProcedureGrab samples were taken daily from each of the following sampling points: raw river water, tube-settler, MBBR stages, membrane filtration effluent and final effluent following chlorination.Each of the sampling point was analyzed for pH, temperature, Dissolved Oxygen (DO), TAN, nitrate (NO3), nitrite (NO2), soluble COD, TSS and alkalinity
17 Water Characteristics Water temperatureAverage 31.9°CMax. 34.6°CAverage 14°CMin. 13°C
18 Temperature Effect Average TAN effluent: 0.1±0.04 to 1.5±1.5mg/l TAN removalAverage TAN effluent: 0.1±0.04 to 1.5±1.5mg/l% removal% removal
19 Temperature EffectNitrate removalAverage Nitrate influent: 2.2 mg/l; after stages 1&2: 6.7 mg/lAverage Nitrate effluent: 4.3 mg/l < 9 mg/l
20 Evaluation of each stage MBBR stage 1 & (Aerobic )Removal Rates (RR) across the aerobic stages ranged between 0.45 to 2.6 gNH4/m2/dRelatively high removal rates in both aerobic stages emphasize the importance and the need of two aerobic stages in sequenceTAN effluent still above the required value Additional aerobic stage is requiredAlthough nitrification was the major mechanism for ammonia removal, about mg/l TAN was assimilated to bacteria cells in each aerobic stage (about 1% to 14%).
21 Evaluation of each stage MBBR stage (Deox )For reduction of DO concentration
22 Evaluation of each stage MBBR stage (Deox )In order to ensure anoxic conditions, the addition of ethanol was requiredThe Deox stage was not suitable for denitrification butallowed good conditions for the following anoxic stagemg/l Ammonia was assimilated in to the cells
23 Evaluation of each stage MBBR stage (Anoxic )Removal Rates (RR) across the anoxic stage are below 1 gNO3/m2/d, despite:Low DO concentrationHigh C:N ratioNitrite may disturb nitrate measurements (influent mg/l)In order to prove this assumption, the denitrification was calculated based on the change in the Alkalinity values
24 Evaluation of each stage MBBR stage (Anoxic )Higher nitrate removal should be obtained
25 Evaluation of each stage MBBR stage (Aerobic )Stage 5 was designed in order to reduce the residual carbon source and ensure final removal of ammoniaRelatively low COD and TAN removal ; during the warmer months COD and ammonia inlet concentrations were lower due to high activity in the previous stagesAssimilation was the main mechanism for TAN removal
27 Aqwise – Clear and Simple The system can consistently produce high drinking water quality, reducing pollutants levels to below the required concentrationsThe nitrification- denitrification processes were able to cope very well with the changes in the contaminants concentration in the water (temperature range between to 34.6°C)
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