Open AccessPHYSICAL PROPERTIES OF BIOMASS COMPOSITIONS
Author(s) -
Imants Nulle,
A. Kaķītis
Publication year - 2005
Publication title -
vide. tehnoloģija. resursi/environment. technology. resources
Language(s) - English
Resource type - Journals
eISSN - 2256-070X
pISSN - 1691-5402
DOI - 10.17770/etr2005vol1.2117
Subject(s) - angle of repose , straw , biomass (ecology) , peat , bulk density , environmental science , bin , herbaceous plant , materials science , agronomy , pulp and paper industry , composite material , soil science , mathematics , soil water , geography , engineering , algorithm , biology , archaeology
The main resources for biomass agro-ecotechnologies are cereal straw residues, energy crops and emergent vegetation from wetlands. The herbaceous biomass is a material with low density (20 – 60kg·m-3) therefore new mobile equipment and technologies for biomass communition and densification have to be worked out. The storage, dosage and mixing before compacting is necessary. Because of this we must have a working knowledge of the bulk properties of materials. The angle of repose was investigated of straw, reed and peat particles. It was stated that angle of repose of straw and reed varies between 54 – 55 degrees. Angle of repose of peat particles varies between 40 – 60 degrees. In a bin filled with solid bulk material this material acts on the walls with the horizontal stress. The stress ratio between horizontal and vertical stress is important for equipment design. This ratio was investigated for different size particles of straw, reed and peat. Stress ratio of straw and reed particles varies between ~0.6 – 0.7.