Title:
Pelletisation of Biogas Residues with Pelleting Discs
Author(s):
Narra, S., Bhandari, P., Glaser, C., Ay, P., Bischof, H., Busch, G.
Document(s):
Paper
Abstract:
The production and usage of biogas has shown a very good potential in the last decade. An exponential increase in the number of biogas plants installation in Germany was observed. This potential is expected to increase further. Due to the increasing installations of biogas production plants, the amounts of residues from these plants are also increased. These residues from the biogas plants can be used as potential fertilizers. The biogas residues as fertilizers improve the sustainability and reusability in comparison to the commercial fertilizers available in the market and are helpful in reducing CO2 and N2O emissions. Pelletisation of biogas residues requires more understanding with respect to the physical and chemical properties of the substrates used. The characteristics of the biogas residues vary depending on the substrate and substrate mixtures utilized. Each biogas plant generates huge amount of residues with varying characteristics. The characteristics of residues display its suitability as a liquid fertilizer. The fertilization is generally done in the growing seasons and during the winter season this liquid fertilizer creates problems in storage, handling and transportation due to the presence of high percentage of water (80 to 95 % depending on substrate). These problems can be overcome by means of pelletisation. Especially the increased use of renewable raw materials for biogas production result an increase in fiber and solid contents of the biogas residues. The solids of digestate consist mainly of lignocelluloses, which is not degradable or difficult to degrade under anaerobic conditions. Pelletisation of biogas residues was carried out with the help of pelleting discs and various additives by agglomeration of the fibers and by utilization of water as a binder. The present work investigates the mechanical stability, chemical characteristics of the pellets with respect to the impact of additives (binders, adhesives) on the fertilizer quality.
Keywords:
pelletization, pelletisation, biogas residues, press pelletisation, build-up pelletisation, press pelletization
Topic:
Processes for Fuels from Biomass
Subtopic:
Production and supply of solid biofuels
Event:
19th European Biomass Conference and Exhibition
Session:
VP3.1.3
Pages:
1937 - 1941
ISBN-13:
978-88-89407-55-4
ISBN-10:
88-89407-55-7
Paper DOI:
10.5071/19thEUBCE2011-VP3.1.3
Price:
FREE
