Assessment of Multimodal Transport of Baled Poultry Litter and Dewatered Biosolids from Northwest Arkansas
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2007-07-03
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TRIS Online Accession Number:1056029
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OCLC Number:170103455
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Edition:Final Report
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Abstract:Stakeholders in the Ozarks region have expressed concern over the degradation of surface water, with the poultry industry and municipal wastewater plants cited as possible contributors. Exporting poultry litter and municipal biosolids is a possible approach for ameliorating the excess nutrient situation and to improve water quality in the Northwest Arkansas (NWA) region. Handling and truck-transporting raw poultry litter and dewatered biosolids out of the region is costly. Processing approaches such as pelleting and granulating reduce volume by roughly 10% but are expensive. A less expensive processing and transport combination must be found if poultry litter and biosolids are to be marketed as a crop nutrient source. Mammoth Corporation (Spokane, WA) and the University of Arkansas (U of AR) Division of Agriculture collaborated to develop technology for plastic-wrapping baled litter and biosolids and to evaluate their quality. The results of the project are expected to be useful in addressing excess nutrient issues in the NWA region and to serve as ground work for solutions to similar problems elsewhere. In Washington State, poultry litter produced from varying moisture contents (approx. 25%, 40%, and 55%) was plastic-wrapped with a modified municipal solid waste baler and stored outside for a period of three months. The bales were transported from Spokane to Prairie County, AR on a flatbed truck; the baled litter was land-applied under typical field conditions. Field handling and spreading posted no major difficulties, especially at moisture levels around 40%. Preliminary pathogen tests revealed no salmonella or E-coli in the baled litter. Nutrient tests indicated that inorganic nitrogen was present in a form not susceptible to volatilize as ammonia, demonstrating that baled poultry litter can be land-applied without requiring soil incorporation. Co-processing poultry litter and biosolids has never been done, but it is expected to be a cost-effective and cutting-edge means of deriving the benefit of these products while eliminating potential biosecurity and sanitary threats. Processing both products into bales is expected to eliminate pathogens that are usually present in the litter and biosolids, which takes advantage of the nutrients in both products and reduce potential nitrogen losses. Unlike other litter and biosolids materials, plastic wrapped bales can be transported in a variety of truck trailers; thus truckers can take advantage of more backhaul opportunities. The Ultraviolet (UV) plastic-wrapped bales can be stored outside at their destination, reducing the need for storage and double handling costs at the market end. Two types of transport methods will be investigated: truck and a combination of truck and barge. Young et al. compared these options in the shipment of poultry litter in raw and baled forms from Northwest to Eastern Arkansas and found that while truck transport of bales is cost effective to supply nearer nutrient markets, a truck and barge combination is more cost effective.
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