Figure 2(a) shows 98% COD removal at 125 min using PEF, but Figure 3 indicates 100% COD removal at 150 min under the same conditions (COD 2500 mg/L, pH 3, H₂O₂ 300 mg/L, etc.). Why is there a discrepancy? Which value is reproducible?
Power consumption of H₂O₂ alone reported as 0 kWh/m³ in Figure 2(b)! This implies no energy input, yet H₂O₂ addition requires mixing and pumping. How was this zero value justified? Did you ignore the energy for chemical handling and stirring?