Substitution of Wax and Grease Cleaners With Biodegradable Solvents: Phase 1. Part 2
2007
Wikoff, P. M. | Schober, R. K. | Harris, T. L. | Suciu, D. F. | McAtee, R. E.
Methods have been tested for systematic evaluations of biodegradable solvents for aircraft parts cleaning, degreasing, and masking-wax removal processes. Screening tests have identified solvents that are biodegradable can efficiently remove soils from aircraft parts in a dip tank and meet the military specification requirement for corrosiveness (ANSI/ASTM) in processes used at the five Air Force Air Logistics Centers (ALCs). The database developed during Phase I, of this program identifies each process, the chemicals used, tank volumes, testing requirements, and alternative chemicals. To test solvent biodegrability, an ASTM method was modified and used to test a bench-scale activated sludge system by measuring chemical oxygen demand (COD) and adenosine triphosphate (ATP) over a 6-hour period to determine if the bacteria will reduce COD to below the limit established by the National Pollution Discharge Elimination System (NPDES). Solvents were categorized to identify any trends, and six were selected for in-depth pilot-scale testing.... Solvents, Cleaners, Halogenated, Hydrocarbon, Biodegradable Industrial wastewater, Hazardous waste minimization.
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