Effect of Eleca

Electrolysis technology

・Treatment of NH₄-N・COD・BOD components in wastewater.
・By decomposing and reducing the molecular weight of water-soluble organic 　　matter, it contributes to improving the adsorption efficiency and extending the 　life of activated carbon.
・Decolorization (Decoloration) of wastewater.
・Deodorising wastewater.

Eleca equipment flow（Smaller space than microbiological treatment）

Specification of Eleca

Specification

	Eleca®	Eleca® mini
Equipment size	H ：2,600 mm　　W：6,000 mm　　D：3,000 mm	H ：1,795 mm　　W：2,825 mm　　D：1,500 mm
Equipment Weight	About 6,000 kg	About 1,000 kg
Ammonia nitrogen treatment capacity	Approx.100m³/day. The condition to reduce ammonia nitrogen from 200mg/L to 10mg/L or below	Approx.5m³/day. The condition to reduce ammonia nitrogen from 200mg/L to 10mg/L or below
Amount of wastewater to be treated	N-fold Eleca to match the volume of wastewater	N-fold Eleca to match the volume of wastewater

Features of Eleca

Environment-independent installability

The process is stable in all seasons and weather conditions.

Easy operation

Operation is only ON/OFF.
Reduces the burden on facility managers.

Small space

Layout flexibility for any installation location.
Supports replacement of existing equipment and facility expansion.

No sludge

Electrolysis uses chemical reactions to break down and treat target components.
No sludge or other waste is generated, making the equipment both operational and environmentally friendly.

Highly durable electrodes produce active oxygen

Over the years we have developed electrodes that efficiently generates reactive oxygen species and are excellent in corrosion resistance.
The electrode replacement life is low, contributing to lower operating costs.
*compared to our company’s product

Treatment Case Studies

（１）Case studies of PFAS-containing wastewater treatment

▪ Decomposition of PFOA and PFOS by electrochemical oxidation.

▪ Decomposition of PFOA by electrochemical oxidation.

▪ Decomposition of PFOS by electrochemical oxidation.

▪ Eleca Operational Cost Estimation （Units Required, Electricity Cost）

▪ Mass Balance of PFOA (C₈HF₁₅O₂) Degradation

▪ PFOA Degradation Mass Balance
Results of electrochemical oxidation of PFOA (135,000 ng/L) for 30 min
・92% of PFOA was degraded, with 8% remaining.
・Of the degraded PFOA (92%), approximately 70–90% was converted to fluoride (F⁻).
・A small fraction of PFOA remained as intermediate products, such as PFHpA (C₇HF₁₃O₂) (~0.08%), indicating short-chain transformation during degradation.
・Similar results were obtained for actual wastewater samples.

▪ Proposal: Solutions for PFOA and PFOS Treatment

Benefits
１）Reduction of hazardous substances via degradation
２）Lower operational load on adsorption and separation systems

（2）Ammonia Nitrogen (NH₃-N), COD, and BOD Treatment

▪ Case studies of leachate treatment for controlled landfills
Feature ： Containing NH4-N and component of COD and BOD, etc.

▪ About NH₄-N decomposition reactions

▪ About BOD，COD decomposition reactions

▪ Benefits from the decomposition of COD and BOD components
Activated carbon adsorption increased and life extension

Equilibrium adsorption： Amount of COD_Mn adsorbed on activated carbon per gram
Equilibrium density ： COD_Mn content after reaction of samples with activated carbon
The higher the equilibrium adsorption at the same equilibrium concentration, the more effectively the activated carbon pores are used.

（3）Other Case Studies

▪ Location of use

▪ Wastewater from Palm plant
Problem : The wastewater is not of a clean colour.
If this wastewater is discharged directly into the sea, the sea will become polluted.

▪ Oil-containing wastewater
Wastewater ： Produced water from oil field.
Problem ： Acetic acid and propionic acid cannot be treated with flocculants.