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Jornada: Anàlisi de l’eficiència i eficàcia de sistemes de descontaminació i tractament de nitrats en aigües subterrànies
3 de Maig de 2017
Ground water treatment: MBDEN technology
Proprietary and confidential
Denitrification via moving bed biofilm reactor. DEOX as a preliminary stage for oxygen
reduction. High reduction rate using Aqwise biomass
carriers (ABC). Low biomass yield small waste quantity. MBDEN technology is distributed by
Moving Bed Denitrification (MBDEN): –Nitrate removal by Moving Bed Biofilm Reactor process
Proprietary and confidential
MBDEN main advantages
No Brine; Green process- reduction rather than transfer; ~100% recovery; Tolerance to fluctuations in nitrate levels. Small footprint. Easy upgrade by carriers addition. Lower Capex/Opex Avg. 0,25€/m3 (0,9-1,2
$/kgal)
Proprietary and confidential
Innovation That WorksAqwise Biomass Carriers protect biofilm against abrasion and ensure mass transfer efficiency
Recycled, high-density polyethylene
Highly openexternal design
> 650 m2/m3
Effective surface area
Optimal oxygen andnutrients transfer
Applicable for various biological processes
Conventional carrier
Proprietary and confidential
Biofilm on ABC
Carrier with biofilm
Clean
Israel Case Study
Proprietary and confidential
1. Well closure due to nitrate level above 80 (90-110) mg/l.
2. Regulation applied to the plant regarding Nitarte 60 mg/l.
3. The project is a cooperation between Sdot Yam and Aqwise.
4. Treated drinking water supply begun during March 2014.
Israel Case Study
Proprietary and confidential
Yearly flow: 250,000 m3 (685 m3/d) Hourly flow: 20-70 m3
Nitrate inlet level: 80-110 mg/l Nitrate outlet level: 5 mg/l Nitrate Supplied water level: 60 mg/l Major change in water demand between winter to
summer seasons.
Bases of design
Proprietary and confidential
Contaminated water
110 mgNO3-/l
Untreated groundwater 110 mgNO3
-/l
Biological treatment > UF > AC1-10 mgNO3
-/l
Supplied water<60 mgNO3
-/l
Design approach – Treat & Blend
Proprietary and confidential
Hydro cyclone
reactorDEOXANOX reactor
MBDEN process stages
C&P dosing
Biomass separation & organic residual
removal stage
Supplied water
Chlorination
Dilution with untreated WW
Proprietary and confidential
Summary - Technology Advantages /
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.
SMALL FOOTPRINTSuitable for both new applications and existing plant upgrades.
COST EFFICIENTRequires minimal civil works, short project life cycle and lower Capex/Opex.
WORLDWIDE REFERENCES500 MBBR references. Same process fundamentals in MBDEN
