Design and Fabrication of a Plastic Biogas Digester for the Production of Biogas from Cow Dung

Table 2

Properties of fresh cow dung used in the study [13].

Properties of cow dung	Values	Test method used
pH	7.83 at 30°C	Hydrogen-electrode method
Total solids (TS) g/L	130 800	ALPHA 2005 method
Volatile solids (VS) g/L	110 476	ALPHA 2005 method
Chemical oxygen demand (COD) g/L	42 583	Calorimetric method
Calorific value MJ/g	27.00	Direct method