A wide variety of organic radioactive waste is generated at different nuclear fuel cycle facilities, as well as during different nuclear applications including medicine, research, agriculture, industry, education and training. Processing of organic waste for storage and disposal requires specific approaches. In many cases application of special techniques to destroy organic components of waste or to provide reliable immobilization to isolate organic waste from the environment is required. The processing of organic waste is a rapidly developing field. Various treatment and conditioning options are being investigated, developed and widely applied in several IAEA Member States. This report revises and summarizes available information on different treatment and conditioning options applied for predisposal management of organic radioactive waste.