TECHNOLOGY FOCUS - ENVIRONMENT - Preferred Process: The fermentation promoter is formed from the fermentation processed material obtained by carrying out fermentation of the mixture of the infectious organic waste and the organic waste. During fermentation, the temperature of the mixture is raised to 80degreesC with the fermentation heat of the microorganism, and a sterilization process is carried out. The fermentation process is performed in the treatment tank which has a small radius at the horizontal cross-section and a roughly reversed cone-type having an inclination of 20 - 50degrees in the vertical direction. The lower portion of the treatment tank accommodates the mixture. The fermentation process is performed by a fermentation processing apparatus equipped with several temperature detectors, a stirrer and several cutters which cut the contents. The fermentation processed material is used as a compost. EXAMPLE - Blood (2400 cc) was mixed with organic refuse (2400 kg). Using a processing apparatus a fermentation process was performed and decomposition of human hemoglobin in time-dependent manner was measured. Approximately 97.5% of human hemoglobin was decomposed about 40 minutes after fermentation start. The fermentation temperature was not 65degreesC which generates a feverish protein denaturation. The reduction of human hemoglobin concentration in the fermentation processed material was based on fermentation decomposition of a microorganism. The internal temperature was 80degreesC about 80 minutes after fermentation start. While the temperature was over 90degreesC after 2 hours, approximately 99% of human hemoglobin was decomposed. The problems caused by insect egg, virus and other bacteria was also eliminated. The fermentation processed material contained large portion of mineral and iron content in the blood, and was used effectively as a compost. Since the microorganism bred in the fermentation processed material, the fermentation processed material was recycled as a fermentation promoter or a base material.