The kitchen waste treatment process includes 6 systems: metering and receiving system, pretreatment system, high-temperature aerobic fermentation system, oil-water separation system, sewage treatment system and waste gas treatment system.
The main components of food waste are grains, vegetables, oils, meat and bones, etc., which are rich in starch, protein, fat, inorganic salts and trace elements. In addition to feeding pigs, some of the swill may be used by a small number of criminals to refine edible oil, which flows into the food market and returns to the public's table. "Garbage pigs" and "gutter oil" are difficult to eradicate and pose a great threat to human health. Through organic treatment with microbial technology, it is possible to turn harmful into harmless.
Microbial treatment of kitchen waste refers to the technology of putting safe microbial agents into the garbage treatment box, fully mixing and stirring with kitchen waste, and decomposing kitchen waste into water, carbon dioxide and biothermal energy by releasing a large number of digestive enzymes37%。The wastewater produced can be discharged through the pipe, and can also be used for irrigation of green plants, and the microbial strains in the water can improve the soil environment.
Microbial agents are mainly composed of some high-efficiency bacillus, yeast, high-efficiency macromolecular decomposition enzymes and minerals, which can quickly decompose organic matter with macromolecules.
In the environment of shading and rainproof (to prevent the moisture of the fermented material from being too high), the poultry manure, organic waste fermentation material, etc. and the Gandu (according to the ratio of 5 thousandths, that is, 5kg of bacterial agent mixed with 1000kg of rice bran or sawdust high-carbon auxiliary materials, activate the moisture 55%, the temperature is 38 °) garbage decomposition bacteria according to the addition ratio of 30%, stir evenly, cover the surface of the fermentation material with plastic film, anaerobic fermentation. Or spread the wood chip mixture or spray it on the manure that needs to be fermented.
The key points of kitchen waste wastewater treatment are, firstly, the wastewater has a high oil content and a high suspended solids content, which requires efficient oil separation and suspended solids removal. Second, the concentration of organic matter pollution in wastewater is high, and when the biochemical process is used, the biochemical system has a high load, which requires the biochemical system to have good efficiency. Third, kitchen waste is not convenient for long-distance transportation, and is generally treated nearby, and the reserved vacant land for wastewater treatment is limited. Fourth, a large amount of odor is generated in the process of kitchen waste wastewater treatment, and the odor needs to be effectively controlled.
Innovative treatment process of food waste wastewater: raw water, demulsification and oil removal, physicochemical coagulation and precipitation, anaerobic, anoxic, aerobic, disinfection, and discharge. Microbial degradation technology will treat kitchen waste on the spot, first, the treatment is thorough, the safety is good, there is no odor and odor, and there is no secondary pollution;Second, the total amount of garbage after treatment is reduced by 90%, which reduces transportation costsThird, the treated residue can be made into organic fertilizer to achieve resource recycling.