High-Temperature Fluid-Wall Reactor Technology Research, Test and Evaluation Performed at Naval Construction Battalion Center, Gulfport, Mississippi, for the United States Air Force Installation/Restoration Program

摘要

The objective of this effort was to examine the feasibility of using a thermal-pyrolysis technology to treat Herbicide Orange (HO)-contaminated soil at the Naval Construction Battalion Center, (NCBC) Gulfport MS. A field demonstration of a pilot-scale unit provided the technical evaluation and cost estimates for comparison with other cleanup technologies. The J. M. Huber Advanced Electric Reactor (AER), a high-temperature fluid wall reactor, was used to successfully treat 1100 pounds of soil contaminated with Herbicide Orange and 2,3,7,8-tetrachlorobenzo-p-dioxin (TCDD). The AER process pyrolysis organics at a temperature of 3600 to 4100 degrees F. under a nitrogen atmosphere to prevent combustion. After AER testing was completed, samples of the NCBC feedstock and test-treated soil were sent to two laboratories for analysis. Based on two composite samples, analysis of feedstock showed 2,3,7,8-TCDD levels of 111 and 193 parts per billion (ppb). Concentrations in the treated soil for the sum of all dioxin/furan congeners was less than 1 ppb, the Air Force test criterion. The AER process demonstrated the capability to treat dioxin-contaminated soil and may be considered for full-scale soil restoration at USAF HO sites. Sensitivity analyses of six variables (geographic location, soil quantity, electrical power prices, labor, capital equipment use charge and transportation) were performed to estimate cost for conditions other than those found at NCBC. The process may have application for treatment of more easily pyrolyzed organic compounds such as semivolatiles, pesticides, and polychlorinated biphenyls, as well as some inorganics. (fr)