Soil feed system

USATHAMA) completed a trial burn of explosive, contaminated soil in a rotary kiln (Noland, 1984). Soil contaminated from red and pink water lagoons was successfully burned. A transportable rotary kiln yrstem was set up. The technology by Therm-All, Inc., had been used in industry for destruction of solid wastes. The normal screw feed system was not used, due to fear of a soil explosion during the extruded plug feed process. Therefore, the soil was placed in combustible buckets and individually fed by a ram into the incinerator. The feed rate was 300 to 400 Ib/hr and the operational temperature was 1200° to 1600°F in the kiln and 1600° to 2000°F in the secondary chamber. 

In the process, the TDU heats contaminant molecules above their boiling points to desorb the contaminants into the vapor phase in an oxygen-deficient environment, thus preventing oxidization of the contaminants. The volatilized contaminants and the moisture from the soil are condensed and collected within the system. The process is then controlled by using infrared heating and an alloy belt feed system within the TDU. 

Handl, J., Kallweit, E., Henning, M., and Szwec, L. (2000). On the long-term behaviour of iiOmAg jjj jjig soil-plant system and its transfer from feed to pig. J. Environ. Radioact. 48, 159-170. 

The filariform larva found in moist soils may be either ingested or penetrate the skin of its host. It is then carried through the circulatory system to the lungs and migrates up the respiratory tree into the digestive tract. The worms feed on intestinal tissue and blood. Some worms may persist in humans as long as nine years. Infestations cause cutaneous reactions, pulmonary lesions, intestinal ulcerations, and anemia. 

Describe (where possible) the production system components (e.g. crop or livestock health management practices, soil fertilisation methods, crop rotation designs, livestock feeding and husbandry regimes, crop varieties/livestock breeds used) responsible for differences in food quality and safety between production systems ... 

Because the ASH technology has varied uses in the remediation and industrial sectors, costs will depend on the specific application. According to Advanced Processing Technologies, Inc. (APT), operation and maintenance costs for an ASH system that can process 50 tons of soil per hour are 2 to 5 per ton of soil treated. This estimate also includes labor costs. To process a steady feed stream of 10 to 20 gal/min of wash-rack wastewater, operational costs are 0.60 to 1.50 per 1000 gal of water treated. The capital costs of an ASH unit for this application range from 15,000 to 30,000 (D14439I, p. 2). 

CF Systems extraction process removes a broad range of contaminants and typically extracts more than 99% of the organic contaminants from the waste feed. However, the CF Systems process cannot remove heavy metals or other inorganics. Also, the CF Systems process does not destroy the organic contaminants in soil or waste but rather extracts them from the medium in which they are contained. 

A pilot-scale unit used during a demonstration of B.E.S.T. in Indiana operated at an average feed rate of approximately 90 lb of contaminated sediment per day. It is projected that the commercial unit will be capable of treating up to 186 tons of contaminated soil, sediment, or sludge per day. The treatment cost using the 186-ton-per-day (tpd) B.E.S.T. system was estimated... 

---