highly significantp < 0.0001
A two-way ANOVA analysis showed that the ratio of activated carbon to AC-1 had a highly significant impact on the recovery rate of immobilized AC-1 strains over 120 days of storage ( F = 6.842, p < 0.0001), while the variance analysis results between the bacterial suspension and fermentation broth were significant ( F = 3.274, p < 0.01) ( Figure 1 ).