Accession Number:

ADA202383

Title:

Installation Restoration Program. Environmental Technology Development Task Order - 8. Field Demonstration - Composting of Explosives - Contaminated Sediments at the Louisiana Army Ammunition Plant (LAAP)

Descriptive Note:

Final rept. Jun 86-Sep 88

Corporate Author:

WESTON (ROY F) INC WEST CHESTER PA

Report Date:

1988-09-30

Pagination or Media Count:

161.0

Abstract:

A field scale demonstration of composting explosives contaminated sediments was conducted at the Louisiana Army Ammunition Plant LAAP composting, as used at LAAP, is a treatment process in which organic chemical contaminated soils or sediments are mixed with organic materials such as manure to enhance the role of microbial metabolism in degrading and stabilizing soil sediment contaminants. Lagoon sediments contaminated with TNT, HMX, RDX, and tetryl were mixed with manure, straw, hay, live-stock feed, and fertilizer and composted for 153 days in static piles. Negative pressure aeration was used to maintain aerobiosis and remove excess heat, The initial total explosives concentration in compost was approximately 17,000 mgKg 1.7 wt. After 153 days of composting in a mesophilic 35C and a thermophilic 55C compost pile, the concentration of solvent-extractable total explosives in compost was reduced to 376 and 74 mgKg, respectively. Mean percent reductions for TNT, RDX, and HMX in the mesophilic pile were 99.6, 94.8 and 86.9 wt, respectively. Corresponding values for the thermophilic piles were 99.9, 99.1, and 96.5 wt. Known biotransformation products of TNT diamino-nitrotoluenes and amino- dinitrotoluenes were detected in the initial compost, increased in concentration during the first 4 weeks of composting, and decreased to low mgKg levels thereafter. Keywords Composting Explosives TNT RDX HMX Tetryl Biorestoration Bioreclamation Sediment Pink water Biotransformation. MGM

Subject Categories:

  • Solid Wastes and Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE