*Biogas Production from Water Hyacinth DOI: http://dx.doi.org/10.5772/intechopen.91396*

#### **Figure 3.**

*Cumulative biogas yield per g TS based on F/M ratio.*


### **Table 2.**

*Initial and final total solid of water hyacinth leaves.*

**Figure 4.** *Cumulative biogas yield per gram TS.*

In the variation of N elements, C/N ratios of 20, 25, 30, and 35 were produced. The material components of the variables are shown in **Table 3**.

The equation for C/N ratio had a real influence on the production of biogas with water hyacinth leaves as a raw material. A variation of C/N ratio of 30 gave the best rate of biogas production among other C/N ratio variables, with biogas yield generated at 191,423 ml/g TS [23]. The result of biogas cumulative yield with C/N ratio can be seen in **Figure 5**.
