Q： How to treat kitchen waste？

Answer: The classified kitchen waste is basically treated by crushing, direct discharge, landfill, fertilizer treatment, feed treatment, energy treatment and anaerobic treatment.

　 　 　 　1. Crushing. For this type of household garbage, due to the limited kitchen space, on-site reduction treatment is the basic foothold of kitchen waste treatment. The kitchen waste treatment device is arranged in the kitchen, and the crushed kitchen waste is discharged into the sewer network, mixed with water and then put into the urban sewage treatment system for harmless treatment, so as to achieve the purpose of harmlessness.　

　 　 　 2. Landfill. Because the kitchen waste contains a large number of degradable components, the stability time is short, which is beneficial to the recovery and use of the landfill site, and the operation is simple.

　 　 　 3. Carry out fertilizer treatment. Fertilization treatment methods of kitchen waste mainly include aerobic composting and anaerobic digestion. Aerobic composting process is to decompose organic solids into soluble organic substances by extracellular enzymes secreted by aerobic microorganisms under aerobic conditions, and then infiltrate into cells, and realize the whole composting process through microbial metabolism.

　 　 　 4. Feed treatment. The principle of feed treatment of kitchen waste is to use a large amount of organic matter contained in kitchen waste, and after crushing, dehydration, fermentation and soft and hard separation, the waste will be transformed into high-calorie animal feed, turning waste into treasure.

　 　 　 5. Carry out energy treatment. The energy treatment of kitchen waste mainly includes incineration and thermal decomposition. Incineration method has a high efficiency in treating kitchen waste, and finally produces about 5% residue which is convenient for disposal. Incineration is carried out in a special incinerator, and the generated heat energy can be converted into steam or electric energy, thus realizing the recycling of energy.

　 　 　 6 kitchen waste should be provided to specialized processing units for processing. It is strictly forbidden to use waste edible oils (including gutter oil) as edible oil after processing, to directly use kitchen waste to raise livestock and poultry and fish, and to use kitchen waste without harmless treatment to produce fertilizer.

　 　 　 7. Carry out anaerobic treatment process. After pretreatment, the kitchen waste produces crude oil and organic slurry, and the organic slurry enters an anaerobic fermentor for fermentation to produce biogas, which is purified and used for power generation and boiler heating.