The initial carbon to nitrogen (C:N) ratio of each
mixture was calculated from the estimated TC and TN concentrations of the mixture. The initial
properties are summarized in Table 1.
Statistical analyses
The effects of MR on substrate temperature, pH
and biogas production were analysed by
subjecting the data collected to one-way analysis
of variance (ANOVA). Duncan's Multiple
Range Test was used to separate means that
were significant at p 0.05. Pair-wise correlation
of parameters was carried out to determine
significant relationships. All analyses were
performed using the Statistical Analysis System
software (SAS, 2002).