Odor Free Compost Systems

IASP Biosolids Odor Emissions Study

MOR Composting Facilities

Image: Wood chip base

Wood chip base

Biosolids are unloaded over a wood-chip base.

Timpanogos Special Service District (TSSD) retained Managed Organic Recycling (MOR), an environmental engineering firm specializing in organic feedstock composting, planning, design, and operations consulting to evaluate the In-vessel Aerated Static Pile (IASP) biosolids compost Technology. The scope of services includes sampling and testing odor emissions generated from the process during the active phase of composting.

The tests were performed at the Central Valley Water Reclamation Facility in Salt Lake City, where they operate a biosolids composting facility with a capacity of about 35 tons of biosolids per day. Odor emissions tests were performed on dewatered (about 15 percent solids) aerobically digested biosolids trucked in from TSSD. One IASP pile was constructed using a mix ratio of 1 to 4 (biosolids to wood chip bulking agent) to achieve the desired moisture content and porosity in the mix. The mix was then covered with a MOR expanded polytetrafluoro-ethylene (ePTFE) micropore compost cover. The testing period covered four weeks.

To read more about this study in the Daily Herald, click here!