Graymills Biomatic parts washer virtually eliminates waste disposal, according to the company. CTHe machines works through the process of "bioremediation." These units use naturally safe hydro-carbon converting microbes in the cleaning solution to cleanse it of oil, grease and most other organic impurities. Two models available, BIO436R-A (with lid) or BIO536R-A (lid-less). Use Super Biotene cleaning solution. Washers are rugged thermoplastic, have Flow-thru brush and Stay-Put nozzle, 9-inch deep sink, 30 gallon reservoir, low water shut-off, triple action filtration and many other features.