The Van region has a large Kurdish population, and the Van cat has been referred to as the Kurdish cat or Kurdish Van cat, and made a symbol of Kurdistan in Kurdish nationalist circles.
Each cubic meter (m 3) of biogas contains the equivalent of 6 kWh of calorific energy. However, when we convert biogas to electricity, in a biogas powered electric generator, we get about 2 kWh of useable electricity, the rest turns into heat which can also be used for heating applications. 2 kWh is enough energy to power a 100 W light bulb for 20 hours or a 2000W hair dryer for 1 hour.
volume required to make 1 kg biogas = mass ( 1 kg )/ density (1.15 kg/m3) = 0.86 m3. therefore to produce 1 kg of biogas we need 0.86*25 = 21.7 approx 22 kgs of dung. Please note the above calculation has been conducted without the addition of water. Generally a 1:1 ratio of feedstock is to water is taken. This will alter the calculations significantly.