Abstract: The separation of oil from filter cake, such as a transformer filter cake, is achieved by contact mixing filter cake with protein additives in water for a sufficient time for substantially all the oil to be displaced from the filter cake, flushing displaced oil and filter medium with water in a separating device and collecting the oil and the filter medium separately. The separation occurs with little or no remediation of the oil taking place so that both the oil and the filter medium can be reused.

Abstract: Remediation of toxic waste materials in solid, liquid or a mixture of solid and liquid form provides rapid reduction of the toxic conditions to innocuous levels. The process utilizes indigenous microorganisms present in the waste materials. The process comprises contact mixing waste materials with protein nutrients in water, air entraining the waste materials and protein nutrients during mixing to form a bioactive structure, and exposing the bioactive structure to cure in air until the toxic materials are remediated to a predetermined innocuous level.