2.2 Slurry mixing tank
A slurry mixing tank (Figure 1) was developed. It is a pre-mixing chamber where different components of the raw materials for the gas production (water and manure) were mixed to form a uniform mixture of the slurry, which is fed into the digester (Figure 2). A 500 mL cylinder was used for the construction of this component. It is made of glass, the height is 12.5 cm and diameter of 9.7 cm.