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Nitrogen Removal from Yamuna River (India) using MBBR – Pilot Summary Keren Nof Presented by: Ramiro Garza September 2014 IPN-ISRAEL WATER WEEK.

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Presentation on theme: "Nitrogen Removal from Yamuna River (India) using MBBR – Pilot Summary Keren Nof Presented by: Ramiro Garza September 2014 IPN-ISRAEL WATER WEEK."— Presentation transcript:

1 Nitrogen Removal from Yamuna River (India) using MBBR – Pilot Summary Keren Nof Presented by: Ramiro Garza September 2014 IPN-ISRAEL WATER WEEK

2 Proprietary and confidential  Introduction  Aqwise Technology  Material and Methods  Results and Discussion  Summary and Conclusions  Questions

3 Introduction

4 Proprietary and confidential  River Water Pollution – How? −Due to fast urbanization and industrial growth – without appropriate infrastructure for wastewater treatment  The problem −Threat to Natural Environment and human health −Odor problems −High Nitrate – Blue baby syndrome River Water Pollution Agriculture sewage Industrial sewage Domestic sewage Drinking Water Algae Bloom

5 REQUIREMENTS SOLUTION HIGHLIGHTS Customer: Location: Capacity: Proprietary and confidential Case Study: Surface Water Treatment River Water Treatment - Agra, India Municipality of Agra Yamuna River, Agra, India 163,000 m 3 /d Need to provide safe drinking water for population of 2 million people Cost-efficient surface water treatment AGAR® MBBR and UF membrane polishing Adaptive to variable loads Secondary effluent from WWTP’s was discharged into the river for years resulting in elevated levels of soluble pollutants (BOD, TAN and NO3)

6 Proprietary and confidential PPhysico-chemical methods −I−Ion-Exchange (IX) −R−Reverse Osmosis (RO) −E−Electrodialysis (ED) BBiological methods −C−Conventional Activated Sludge (CAS) −M−Membrane Bio-Reactor (MBR) −S−Sequencing Batch Reactor (SBR) −M−Moving Bed Bio-Reactor (MBBR) Nitrogen Compounds Removal Technologies Main Disadvantages: Product brine Membrane: Scaling & Fouling Advantages: Cost effective Environmental friendly Nitrogen gas, N 2 → Harmless

7 Proprietary and confidential Pilot Plant After the technology was selected a scaled down pilot (100m3/day) was operated for a year

8 Aqwise Technology

9 Proprietary and confidential MBBR Technology Free-Floating polyethylene media (Aqwise Biomass Carriers) AGAR® MBBR Solutions  Simple, single-through process  Reduces soluble pollutants with minimal process complexity  Requires a significantly smaller footprint Moving Bed Biological Reactor

10 Proprietary and confidential Innovation That Works Aqwise Biomass Carriers protect biofilm against abrasion and ensure mass transfer efficiency Recycled, high-density polyethylene Highly open external design > 650 m 2 /m 3 Effective surface area Optimal oxygen and nutrients transfer Applicable for various biological processes

11 Proprietary and confidential Customer Benefits / DURBLE & STABLE Highly resistant to hydraulic shock loads with short recovery time after toxic loads. LOW MAINTENANCE Simple maintenance and low operational costs. ECO FRIENDLY Recycled materials, less land usage, no scenery obstruction and less sludge. SMALL FOOTPRINT Suitable for both new applications and existing plant upgrades. COST EFFICIENT Requires minimal civil works, short project life cycle and lower Capex/Opex. SCALABLE & FLEXIBLE Smooth upgrade or gradual expansion based on just-in-time investment.

12 Materials and Methods

13 Proprietary and confidential  Pretreatment units: fine screen (5mm) and tube settler  Moving Bed Bio Reactor (MBBR)  Ultrafiltration for solids separation  Chlorination System Description Schematic pilot plant flow diagram The system consists the following treatment units

14 Proprietary and confidential  Influent Characteristics Design Data  Effluent Requirements ParameterUnit Inlet to the MBBR Design Temperature°C 15/30 CODmg/l 99 BOD5mg/l 29 TSSmg/l 34 TANmg/l Nitrate as Nmg/l 5.1 Nitrite as Nmg/l 0.7 ParameterUnit Value TANmg/l 1.65 Nitrate as Nmg/l 9.0

15 Proprietary and confidential  Grab 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 (NO 3 ), nitrite (NO 2 ), soluble COD, TSS and alkalinity Sampling Procedure

16 Results

17 Proprietary and confidential Water Characteristics Water temperature Average 14°C Min. 13°C Average 31.9°C Max. 34.6°C

18 Proprietary and confidential TAN removal  Average TAN effluent: 0.1±0.04 to 1.5±1.5mg/l Temperature Effect % removal % removal

19 Proprietary and confidential Nitrate removal  Average Nitrate influent: 2.2 mg/l; after stages 1&2: 6.7 mg/l  Average Nitrate effluent: 4.3 mg/l < 9 mg/l Temperature Effect

20 Proprietary and confidential MBBR stage 1 & 2 (Aerobic )  Removal Rates (RR) across the aerobic stages ranged between 0.45 to 2.6 gNH 4 /m 2 /d  Relatively high removal rates in both aerobic stages emphasize the importance and the need of two aerobic stages in sequence  TAN effluent still above the required value  Additional aerobic stage is required  Although 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%). Evaluation of each stage

21 Proprietary and confidential MBBR stage 3 (Deox )  For reduction of DO concentration Evaluation of each stage

22 Proprietary and confidential MBBR stage 3 (Deox )  In order to ensure anoxic conditions, the addition of ethanol was required  The Deox stage was not suitable for denitrification but allowed good conditions for the following anoxic stage  mg/l Ammonia was assimilated in to the cells Evaluation of each stage

23 Proprietary and confidential MBBR stage 4 (Anoxic ) Evaluation of each stage  Removal Rates (RR) across the anoxic stage are below 1 gNO 3 /m 2 /d, despite:  Low DO concentration  High C:N ratio  Nitrite 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 Proprietary and confidential MBBR stage 4 (Anoxic ) Evaluation of each stage  Higher nitrate removal should be obtained

25 Proprietary and confidential MBBR stage 5 (Aerobic )  Stage 5 was designed in order to reduce the residual carbon source and ensure final removal of ammonia  Relatively low COD and TAN removal ; during the warmer months COD and ammonia inlet concentrations were lower due to high activity in the previous stages  Assimilation was the main mechanism for TAN removal Evaluation of each stage

26 Summary & Conclusions

27 Proprietary and confidential  The system can consistently produce high drinking water quality, reducing pollutants levels to below the required concentrations  The nitrification- denitrification processes were able to cope very well with the changes in the contaminants concentration in the water (temperature range between 13.0 to 34.6°C) Aqwise – Clear and Simple

28 Proprietary and confidential Questions ? Anoxic stage Aerobic stage

29 Contact Information Contact us for further information about Aqwise solutions Keren Nof Senior Process Engineer Website Telephone


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