Summary: " The Pueblo Chemical Depot (PCD) in Colorado is one of two sites that features U.S. stockpile of chemical weapons that need to be destroyed. The PCD features about 2,600 tons of mustard-including agent. The PCD also features a pilot plant, the Pueblo Chemical Agent Destruction Pilot Plant (PCAPP), which has been set up to destroy the agent and munition bodies using novel processes. The chemical neutralization or hydrolysis of the mustard agent produces a Schedule 2 compound called thiodiglycol (TDG) that must be destroyed. The PCAPP uses a combined water recovery system (WRS) and brine reduction system (BRS) to destroy TDG and make the water used in the chemical neutralization well water again. Since the PCAPP is using a novel process, the program executive officer for the Assembled Chemical Weapons Alternatives (ACWA) program asked the National Research Council (NRC) to initiate a study to review the PCAPP WRS-BRS that was already installed at PCAPP. 5 months into the study in October, 2012, the NRC was asked to also review the Biotreatment area (BTA). The Committee on Review of Biotreatment, Water Recovery, and Brine Reduction Systems for the Pueblo Chemical Agent Destruction Pilot Plant was thus tasked with evaluating the operability, life-expectancy, working quality, results of Biotreatment studies carried out prior to 1999 and 1999-2004, and the current design, systemization approached, and planned operation conditions for the Biotreatment process. Review of Biotreatment, Water Recovery, and Brine Reduction Systems for the Pueblo Chemical Agent Destruction Pilot Plant is the result of the committee's investigation. The report includes diagrams of the Biotreatment area, the BRS, and WRS; a table of materials of construction, the various recommendations made by the committee; and more.'-- Publisher's description.Content Notes:
Machine generated contents note: 1.Background -- Brief Description of the PCAPP Process -- Statement of Task -- Scope -- Organization of This Report -- References -- 2.The PCAPP Biotreatment System -- General Description of the Bioreactor System -- Committee's Review of the System -- Complexity of the Influent Stream and Related Toxicity/Inhibition -- pH Impacts on Biodegradation -- Temperature Impacts on Biodegradation -- Solids Buildup Concerns -- Oxygen Demand and Flux Issues -- Start-up Issues -- Analysis and Composition of the Effluent and Off-Gas from the Bioreactors -- References -- 3.The Water Recovery And Brine Reduction Systems -- Acid Addition, Feed/Distillate Heat Exchange, and CO2 Stripping -- Evaporation with Steam Compression -- Crystallizer Description -- Belt Filtration -- Condensation of Vapor from the Deaerator, Evaporator, and Crystallizer -- Activated Carbon Adsorption -- Uses of Carbon -- Distillate Carbon Filters -- Issues Related to the Water Flow Stream -- Drinking Water Quality Requirement -- The Crystallizer -- The Evaporator -- The Deaerator -- Issues Related to the Gas Flow Stream -- Issues Related to the Solids Flow Stream -- Issues Related to the Entire BRS -- References -- 4.Materials Of Construction Review -- Materials of Construction for the Biotreatment, Water Recovery, and Brine Reduction Systems -- Overview -- Corrosion Monitoring -- Corrosion-Monitoring Methods -- Use of Metallic Coupons -- Electrical Resistance Probes -- Polarization Resistance Measurement -- Electrochemical Noise -- Other Considerations Relevant to Corrosion Monitoring -- References -- A. Table of Materials of Construction -- B. Corrosion-Monitoring Guides and Testing Materials Suppliers -- C. Biographical Sketches of Committee Members.Notes:
Includes bibliographical references.
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