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Plasma Electrocoagulation (PEC)
- New advanced water treatment technology
PEC – Plasma ElectroCoagulation
- Combines traditional ElectroCoagulation (EC) with advanced Plasma technology
- More efficient than EC
- Cost-effective, reliable alternative or compliment to traditional chemical addition technologies
- High runtime, consistent performance and a small footprint (e.g. less space, higher water recovery)
- A leap forward in water treatment technologies
What is Electrocoagulation
- Invented in 1882
- Causes colloidal material to destabilize through the addition of charged ions into a waste stream
- Destabilized colloids then aggregate (floc)
- Can be removed through sedimentation
- Advantages
- Useful for multiple contaminants, including metals and dissolved product
- Low operating costs
- Low maintenance
- No (or little) chemical usage
Plasma – Fourth State of Matter
- Gaseous mixture of electrons and positive ions
- Created by
- Heating a gas
- Subjecting a gas to a strong electromagnetic field
- At low temperatures, ions and electrons tend to recombine into atoms, generating a gas and dissipating energy
- Used in
- Neon signs
- Televisions
- Rocket thrusters
- Arc welding/plasma torches
- Etc.
A Leap in Water Treatment Technology
Encotech combines advanced, patented plasma technology with traditional electrocoagulation revolutionizing water filtration methods and technology.
- Methods of action
- Free radicals and oxidative species
- UV light generation
- Cavitation
- Target contaminates
- Heavy Metals
- Organics/Hydrocarbons
- Suspended Solids
- Biological life
- Biological Oxygen Demand (BOD)
- Chemical Oxygen Demand (COD)
- Soluble chemicals
- Advantages
- Highly effective and efficient
- No chemical usage
- Durable
- Relatively simple compared to traditional technologies
- Low maintenance
From Left to Right: Before Treatment, During Treatment, Treated Water
The Technology Behind Plasma EC
- EC Reactions plus highly active species generated with plasma
- Encotech developed technology to control plasma generation in conjunction with EC
- Saturable reactor – power supply
- Existing transformer technology, modified
- Reliable
- Automatically limits current output
- Insulator on electrodes
- Focuses power density to generate plasma at low power and voltage
- Automatically retracts as electrodes are consumed
- Integrated system according to Encotech’s patent-pending cross-flow filtration design
- Plasma effluent is filterable
Plasma EC – In Action
Encotech Plasma Water Treatment
- TSS and turbidity: Reductions up to 99+%, Turbidity <1 NTU
- BOD/COD: Reductions of 90+% on raw sewage
- Nutrients:
- Total Nitrogen (note: little ammonia reduction)
- 85+% on raw sewage
- Phosphorous
- 99+% with EC
- 75% on raw sewage
- Metals: 100% removal on multiple species
- Zinc, nickel, cobalt, iron, mercury, etc.
- Oil and Grease: 95+%
- Bacteria/biological kill
- Complete elimination of all detectable life
- Luminultra ATP test (oil industry standard)
The System
Encotech Plasma Water Treatment Advantages/Benefits
- Lower power consumption than EC
- More efficient reactions than external plasma
- Fast reaction time (short retention time in reactor)
- Immediate, large, filterable floc
- Minimal heat generated
- Product recovery rates over 90%
- Low operating expense
- Generate reactive species in situ as compared to shipping chemicals
- More stable effluent = filterable
- Simpler equipment than EC
- Easy, low cost operating expense
- ROIs in 3-7 years (or better in some cases)
- Quick turnaround time
The Three Step Process
1. Self-Cleaning Pre-Filter
Pre-filter heavy solids
2. Plasma EC
coagulgates and bonds dissolved phosphorus
3. Polishing UltraFilter
filter coagulant concencentrat UF reject water to reduce sludge
- Pre-filter heavy solids
- Coagulgate and bond dissolved phosphorous
- Filter coagulant
- Concentrate UF reject water to reduce sludge loading as an option
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Plasma EC – The System
