Performance and Analysis of Floating dome Anaerobic Digester with Wet and Dry Feedstock

The objective of this study is to evaluate the feasibility of anaerobic digestion to
generate biogas yield and it’s performed using wet and dry feed stock. The laboratory
experiment is conducted in a floating dome type anaerobic digester with 1m3 capacity. It is
made up of fibre material at continues process. The starter cowdung used as an inoculum of the
anaerobic digester. Then raw materials feeded as a wet type wheat straw and dry type wheat
straw is the ratio of 1:1 waste/water in both the experiments wet and dry wheat straw. In this
experiments are fermented at 30ºC to 35ºC temperature is maintained. The daily biogas yield,
cumulative biogas yield, pH, CH4, and hydro retention time these parameters is studied and
analysed. The maximum daily biogas is 25liters and 42% of methane is achieved in dry wheat
straw at 15th day of digestion. The highest gas yield obtained in dry condition compare to wet
condition and acid level also decreased in wet digestion.