Evaluation of Demonstration Test Results of Alternative Technologies for Demilitarization of Assembled Chemical Weapons A Supplemental Review (2000) / Chapter Skim
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4 Parsons-AlliedSignal Wheat Process
4 Parsons-AlliedSignal Wheat Process
Pages 18-25
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From page 18... ...
Demonstration testing was conducted for the following components: · munitions cutting and fluid mining · biotreatment of agent and energetics hydrolysates · catalytic oxidation of all gases from the process · metal parts treater for 5X treatment and dunnage treatment MUNITIONS CUTTING AND FLUID MINING A major modification from the standard baseline disassembly system is the use of waterjet cutting for accessing munitions, followed by fluid mining (wash out) of the energetics with high-pressure water jets.
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From page 19... ...
Develop mass loading and kinetic data required for scale-up of ICB unit operations. Validate that the catalytic oxidation (CATOX)
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From page 20... ...
Biotreatment System for Nerve Agent Hycirolysates A flow diagram of the demonstration test unit used for nerve agent hydrolysate is shown in Figure 4-2. The main difference between this system and the system used for HD hydrolysate is the presence of the phosphonate form of phosphorus, which cannot be readily biodegraded.
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From page 21... ...
The very small BOD in the earlier tests was much lower than the theoretical oxygen requirement and undoubtedly much lower than the oxygen actually consumed in the tests. Too low a BOD measurement may be explained as a poor BOD test with a biological culture poorly acclimated to the feed, for example.
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From page 22... ...
METAL PARTS TREATER The MPT system consisted of the following units: a cylindrical furnace heated electrically by induction heaters surrounding the cavity and by a flow of lowpressure superheated steam a furnace to generate and superheat the steam · a heat exchanger to condense most of the outlet steam and the semi-VOCs · a CATOX unit with a preheater and added air to treat gases leaving the condenser a solid caustic scrubber for the gas leaving the CATOX unit The system was run in a batch mode. The chamber was loaded with the material to be treated, and the temperature and steam flow were ramped up to achieve a 5X decontamination condition.
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From page 23... ...
Some significant operational data were not reported: steam flow rate, liquid condensate rate, and vapor and air flow rates to the CATOX unit. The catalytic activity of the CATOX unit is expected to decline slowly with time, but this was not investigated during the demonstration tests.
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From page 24... ...
However, in contrast to the sludges produced from treatment of mustard hydrolysate, the sludges produced from biotreatment of nerve agent hydrolysates were not considered representative of a final acceptable process because of difficulties in processing the phosphonate form of phosphorus. Finding PA-7.
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From page 25... ...
PARSONS-ALLIEDSIGNAL WHEAT PROCESS Recommendation PA-1. Before proceeding to a further scale-up of GB and VX biotreatment processing, the committee recommends that the following steps be taken: · The biotreatment process should be examined care 25 fully at bench scale to determine the factors that are critical to success.
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