Field Evaluation of Hazardous Waste Pretreatment as an Air Pollution Control Technique

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Abstract
Three types of commonly used commercial treatment processes were investigated for the removal of volatile organic compounds (VOCs) from hazardous waste: thin-film evaporation, steam stripping, and distillation. These unit operations were evaluated for their potential to control emissions from hazardous waste treatment, storage and disposal facilities (TSDFs) by reducing waste VOC content. One-day visits were conducted at three sites which operate thin-film evaporators to gather data on the types of waste that can be treated, the treatment costs, and the major emission points. Steam stripping and distillation of six different wastes were evaluated during 3-4 day site visits to two recycling firms. Data collected on these two processes permitted calculation of unit cost-effectiveness and determination of compoundspecific stripping rate constants for each batch. Air emission factors were also estimated for these two processes. The full report also contains generic descriptions of thin-film evaporators and distillation processes. Typical unit designs, operating modes, and estimates of unit costs are included. This project summary was developed by EPA’s Hazardous Waste Engineering Research Laboratory, Cincinnati, Ohio, to announce key findings of the research project that is fully documented in a separate report of the same title (see project report ordering information in box)

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