Drum shell bearing edges dictate the boundary conditions and point of contact between drum heads and drum shells. Properties of single 45o, single 45o with slight round-over, and double 45o bearing edges have been studied. It has been found that the double 45o drum allows for the best head/shell energy transfer. I. Background Tom drums are typically composed of a wooden drum shell, a head that ...

Modeling the propagation of bacterial cross-contamination within bulk material is a critical task for validating microbial safety complex post-harvest processing tree nuts. In this paper, discrete element method (DEM) coupled with heat transfer modeling was applied to cell problem, and model outputs were translated into case almond kernels contaminated Salmonella in mixing process. The DEM cali...

Municipal sludge contains significant amounts of energy, which can be exploited by the use of anaerobic digestion, combustion or gasification. However, the relatively high moisture content of dewatered biosolids (usually over 80%) and long field experience makes anaerobic digestion the most favourable process for energy production from biosolids. Micro-sieves are novel apparatuses for the remov...

Vegetable waste usually contains high levels of organic matter, moisture and nutrients that make the waste unsuitable for disposal in municipal landfills. Composting of vegetable waste is in practice by many urban local bodies, and therefore, it was composted along with cow dung and sawdust in a 550-L batch scale rotary drum composter. Four different trials of varying waste combinations of vege...

We present a live drum separation system for a specific target drumset to be used as a front end in a complete live drum understanding system. Our system decomposes drum note onsets onto spectral drum templates by adapting techniques from non-negative matrix factorization. Multiple templates per drum are computed using a new Gamma mixture model clustering procedure to account for the variety of...

This study was conducted to determine the characteristics and biogas production potential of organic materials separated from municipal solid wastes using a rotary drum reactor (RDR) process. Four different types of wastes were first pretreated with a commercial RDR system at different retention times (1, 2 and 3 d) and the organic fractions were tested with batch anaerobic digesters with 2.6 g...