The main technologies for turning food waste into feed include biological methods and physical methods. Recycling of food waste
The biological method uses microbial fermentation technology to make fermented feed. This treatment process generally has a long cycle, requires the selection and management of bacterial strains, and the process is complex. The Chinese invention patent CN02155417. The raw materials and swill materials are mixed and inoculated with yeast and microbial strains controlled by the mixing of the flow controller, and then solid fermentation is carried out in batches under computer control, and then dried, ground, tested and packaged to make a high-calcium multi-dimensional yeast protein feed. The physical method is to dehydrate food waste, dry and disinfect it, and crush it to make dry feed. The Chinese invention patent CN98103203.6 applied for by Zhang Yangkun in 1998 discloses a method for regenerating kitchen waste into livestock feed or agricultural organic fertilizer. The collected kitchen waste can be directly recycled from the source in one operation. After classification, crushing, metering and dehydration, they are sent to the batch waiting tank and sent to the horizontal mixing tank for cooking, sterilization, fermentation or drying. The semi-finished products are then sent to the semi-finished product storage barrel, and then granulated or powdered as required. Made into fish, poultry, livestock feed or organic fertilizer. When used to make feed, the food waste mixed according to the prescription in the metering barrel is sent to the horizontal mixing tank, stirred, cooked and sterilized at a temperature of 100°C to 150°C, and then sent to the dehydrator to dehydrate to an appropriate moisture content before entering the batch. trough; then the dehydrated food waste is sent from the batch waiting trough to the horizontal mixing tank for stirring and drying at a temperature of 120°C to 150°C, and the appropriate amount of grease and oil are added from the grease storage tank and additive storage tank according to the formula. Other nutrients are made into semi-finished products until the moisture content is reduced to the specification requirements, and are sent to the feed semi-finished product storage barrel; finally, the semi-finished products are made into granular or powdered fish, poultry, livestock feed or agricultural feed through a granulator or crusher as needed. Use organic fertilizer.