C - Chemistry – Metallurgy – 05 – F
Patent
C - Chemistry, Metallurgy
05
F
C05F 17/00 (2006.01) C05F 9/00 (2006.01)
Patent
CA 2114350
This patent application submitted by Savoy Enterprises Ltd. pertains to the composting of municipal solid waste and/or biosolids (sewage sludges) and the related removal of noxious or offensive odors, if they exist, from the composting process air leaving or being expelled from the material being composted. Aerated Static Pile, Agitated Bin or Bay (hereinafter referred to as Bay) or Aerated Windrow Composting noxious or offensive odors in the air emissions from the composting process are controlled by using some of the material being composted as a biofilter for control of odor from the compost process air that is being recirculated through the composting material. Combining composting and biofiltration of recirculated process air reduces the amount of fresh process or make-up air required from the atmosphere outside of the composting structure and correspondingly the amount of air leaving the composting facility that might require external processing for odor reduction. The total composting area is physically separated into zones to minimize the comingling and mixing of the air in the building or structure in which the material to be composted is placed. The air above the separated bays with the fresh or new material to be composted is collected and transported via ducts or piping to the separated bays that contain material that is approaching the advanced stages of composting in the structure and used as the process air supply in these advanced stage composting areas The amount of air to be recirculated through the composting material within the composting building or structure could vary between 90+ percent to 10- percent of the total process air requirements, depending on the characteristics of the material to be composted and the period of time established for composting at separate facilities, thereby reducing the amount of fresh make-up air by 90+ to 10- percent and correspondingly reducing the amount of air that might require external odor control processing.
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