Table 1.
Chemical characteristics of raw materials used in this study.
Table 2.
Effects of temperature on pH value in anaerobic co-digestion with a C/N ratio of 25.
Table 3.
Effects of temperature on total ammonia content in anaerobic co-digestion with a C/N ratio of 25.
Table 4.
Effects of temperature on free ammonia content in in anaerobic co-digestion with a C/N ratio of 25.
Figure 1.
Effects of temperature on methane potential in mixtures with a C/N ratio of 25.
Values are presented as the mean ±standard error of three replicates (n = 3). Vertical bars represent LSD at the 5% level.
Figure 2.
Changes of pH, total ammonium nitrogen, and free ammonia with different C/N ratios in the mixture of dairy manure (DM), chicken manure (CM), and rice straw (RS) in anaerobic co-digestion at 35°C.
Values are presented as the mean ±standard error of three replicates (n = 3). Vertical bars represent LSD at the 5% level.
Figure 3.
Changes of pH, total ammonium nitrogen, and free ammonia with different C/N ratios in the mixture of dairy manure (DM), chicken manure (CM), and rice straw (RS) IN anaerobic co-digestion at 55°C.
Values are presented as the mean ±standard error of three replicates (n = 3). Values are presented as the mean ±standard error of three replicates (n = 3). Vertical bars represent LSD at the 5% level.
Figure 4.
Changes of methane potential with different C/N ratios in the mixture of dairy manure (DM), chicken manure (CM), and rice straw (RS) in anaerobic co-digestion at 35°C and 55°C.
The dotted lines were fitting curves for both temperatures. Values are presented as the mean ±standard error of three replicates (n = 3). Vertical bars represent LSD at the 5% level.