Table 5 Summary of the cost analysis of the EC-EO method described in the literature for real wastewater treatment.

EC (anode: Al, cathode: Gr), EO (anode: Al, cathode: Gr)

Soluble coffee production

Current density = 149.2 A/m², pH = 7.98, time = 62 min

COD (89), colour (100), TOC (72)

45.28 kWh/m³

⁶⁴

Anode and cathode: Gr, BP: Al

Pulp/paper mill

EC = 5 mS/cm, current = 1 A, and pH = 6

COD (87), colour (100), turbidity (100)

1.33 $/m³, 31.6 kWh/kg COD

⁶⁵

Anode: TiO₂, cathode: Al

Dairy wastewater

Current = 2 A, time = 60 min

COD (57.5) and turbidity (98.72)

17.95 €/m³

⁶⁶

Anode and cathode: Gr, BP: Al

Restaurant wastewater

Current = 4 A, time = 90 min, and pH = 7

O&G (98), COD (90), BOD (86), PO₄ (88), and turbidity (98)

1.56 US$/m³

⁶⁷

Anode: Fe, cathode: CF

Domestic wastewater

Current density = 100 A/m², t = 20 min and pH: 7.8

E.coli (100) and COD (97.5)

1.6 $/m³, 18.9 kWh/m³

⁶⁸

EC (anode: Al, cathode: Ti) and EO (anode Gr, cathode: Ti)

Textile wastewater

Current density = 4.1 mA/cm², pH = 4, conductivity = 3.7 mS/cm

DCOD (70)

1.47 $/m³

⁶⁹

EC (anode: Al, cathode: Fe) and EO (anode: Ti/Pt, cathode: SS)

Domestic GW

Current = 2.6 A, EC time = 31.67 min, EO time = 93.28 min, and pH = 4.67

COD (96.1), colour (97.5), turbidity (90.9) and TOC (98)

0.01 kWh/kg COD; 0.008 kWh/kg colour; 0.062 kWh/kg turbidity; 0.079 kWh/kg TOC; 0.28 $/m³

Present study