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Latest In-vessel composting Stories

2008-07-24 03:00:37

By Wichuk, Kristine M McCartney, Daryl Pathogen inactivation is expected to occur in compost if temperatures over 55[degrees]C (131[degrees]F) are maintained for at least 3 days, or 15 days in windrows. However, a literature review revealed pathogen survival in a significant number of processes appearing to meet the prescribed time-temperature criteria. It was hypothesized that pathogen survival may be due to the existence of undetected temperature variations within the compost mass. In...

2008-07-24 03:00:37

By Bueno, P Yanez, R; Ariza, J; Diaz, M J The kinetic of the thermophilic composting process of trimming residues was studied under several parameters [moisture (40-70%), aeration (0.2-0.61 air/kg min) and particle size (1-5 cm)] in order to determine the best composting conditions to ensure an optimum composting design. Under those conditions, suitable temperature evolutions have been found for all the reactors. The kinetic model proposed by Whang and Meenaghan was used and two first-order...

2007-01-07 03:00:18

By Spencer, Robert L Annual meeting of in-vessel composting facility operators included representatives from seven MSW composting plants that utilize the rotary digester technology. Lessons learned regarding equipment wear, inspections and critical maintenance are summarized. MANY compost facility design engineers believe a rotary digester that processes municipal solid waste, source separated or mixed, followed by a trommel screen, offers an advantage over other technologies in...


Word of the Day
call-note
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'
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