This shows that swine wastewater can be efficiently
oxidized and partly transformed to be biodegradableorganic matter by several radicals [14]. Pearson correlation
between the current density and the applied irradiation dose
related to COD removal is shown in Supplementary Table 1. As
shown in Supplementary Table 1, the current density was closely
correlated to the applied irradiation dose (20–75 kGy). From the
result of ANOVA test, the COD removal efficiency at each applied
dose differently increased with the current density (P < 0.05).
Post Hoc tests in ANOVA related to COD removal is shown in
Supplementary Table 2. As shown in Supplementary Table 2,
except for the applied dose of 100 kGy, the mean differences were
significant at the 0.05 level. This implies that organic matter in
swine wastewater was effectively used as electron donors after
an electron irradiation.