HD Hydrolysis/Biodegradation Toxicology and Kinetics.

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 gL NH4Cl, 0.28 gL 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.