Accession Number : ADA319798

Title :   HD Hydrolysis/Biodegradation Toxicology and Kinetics.

Descriptive Note : Final rept. Oct 95-Jun 96,

Corporate Author : EDGEWOOD RESEARCH DEVELOPMENT AND ENGINEERING CENTER ABERDEEN PROVING GROUND MD

Personal Author(s) : Harvey, Steven P. ; Szafraniec, Linda L. ; Beaudry, William T. ; Haley, Mark V. ; Rosso, Thomas E.

PDF Url : ADA319798

Report Date : DEC 1996

Pagination or Media Count : 22

Abstract : One technology developed for potential use in the disposal of RD (2,2'-dichlorodiethyl sulfide) from the Aberdeen Proving Ground unitary chemical stockpile is hydrolysis followed by biodegradation. Stockpile RD (89.2% pure) was hydrolyzed in 90 deg C water at a concentration of 3.8 wt %. The reaction was complete (RD undetectable at 200 ppb level), and the product typically contained 90-95% thiodiglycol. The complete product was amended with 1.5 g/L NH4Cl, 0.28 g/L KH2PO4 and trace mineral salts and fed to aerobic sequencing batch reactors, seeded with activated sludge. The efficiency of carbon removal in the bioreactors was typically >90 %, and the effluent was nontoxic as determined by aquatic toxicity tests.

Descriptors :   *BIODEGRADATION, *HYDROLYSIS, *TOXICOLOGY, GROUND LEVEL, TOXICITY, BIOCHEMISTRY, TEST METHODS, CARBON, CHEMICAL REACTORS, SALTS, DISPOSAL, MINERALS, STOCKPILES, AQUATIC BIOLOGY, ACTIVATED SLUDGE PROCESS.

Subject Categories : Biochemistry
      Toxicology

Distribution Statement : APPROVED FOR PUBLIC RELEASE