Filtration of biogas spent slurry and it’s chemical analysis

Abstract

The biogas spent slurry dewatering mechanism was developed at Department of Renewable Energy Engineering, CTAE Udaipur to filter biogas spent slurry. The prime purpose was to separate water from the biogas spent slurry so that it will be feasible to transport. The mechanism was evaluated for performance at different bed thickness such as 10, 7, 5 and 3.5 cm. For above mentioned bed thickness the drying time was 20, 17, 13 and 8 days respectively. At 3.5 cm the biogas spent slurry was filtrated using maize and sorghum stalk as filter material. To some extent the agricultural waste material helps to retain nutrients such as Nitrogen, Potash and Phosphate in the dried slurry. Amongst them the best results were given when maize stalk used for filtration.