Biosolids composting in Davenport, Iowa

Conference · Sun Sep 01 04:00:00 EDT 1996

OSTI ID:287513

Boyette, R A; Williams, T ^[1]; Plett, S ^[2]

---

1. E and A Environmental Consultants, Inc., Cary, NC (United States)
2. City of Davenport, IA (United States)

The City of Davenport, Iowa constructed an aerated static pile composting facility to process 28 dry tons per day of dewatered biosolids and 25,000 cubic yards per year of yard wastes. This is the first large totally enclosed aerated static pile biosolids composting facility to be built in several years in the US. Design of the facility was completed in March 1994, construction began in July 1994, with substantial completion of the facility in August 1995. This paper outlines the major operating systems and describes the major components of the facility. The facility processes all of the City`s anaerobically digested biosolids which is currently dewatered by belt filter presses to 20% solids. Yard wastes are used as the primary bulking agent supplemented by wood chips and shredded rubber tires to minimize O and M costs. A mechanized continuous feed mixing system consisting of hoppers, conveyors, and pugmill mixers is used to combine bulk agents with the dewatered biosolids to the desired ratio for composting. Composting and drying of these materials occurs in a totally enclosed pre-fabricated metal building for maximum environmental control and odor control. Multiple aeration stations provide both positive and negative aeration through pre-cast aeration trenches beneath compost piles.

• OSTI ID: 287513
• Report Number(s): CONF-960345--; ISBN 0-7918-1227-8
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
COMPOSTING
IOWA
MUNICIPAL WASTES
ORGANIC WASTES
SOLID WASTES
TECHNOLOGY ASSESSMENT
WASTE MANAGEMENT