Catering waste disposal

Reply 1# dawenzi123 Since the gutter oil incident, everyone wants to find a way out, haha!

Otherwise, there will be no place to dispose of the garbage, so we must destroy it at the source.

At present, food waste can be turned into fertilizer or feed through processing. The following are several food waste treatment methods for reference.: 1. Crushing and direct discharge Since the kitchen space is limited, on-site reduction processing is the basic basis for food waste treatment. There are currently many * * They all adopt the method of configuring a food waste treatment device in the kitchen, discharging the crushed food waste into the municipal sewer network, mixing it with water and then discharging it to the urban sewage treatment system for harmless treatment, thereby achieving the purpose of harmlessness.] . This method is suitable for units that generate a small amount of food waste. However, this method often breeds bacteria, mosquitoes and flies in urban sewers and leads to the spread of diseases. At the same time, it may cause blockage of drainage pipes, reduce the drainage capacity of urban sewers, increase the load on the urban sewage treatment system, and inevitably produce a certain amount of secondary pollution. 2. Landfilling Food waste in many areas of our country is sent to landfills together with ordinary garbage for landfill treatment. Landfill is the majority * * The main treatment methods for harmless treatment of domestic waste. Since food waste contains a large amount of degradable components, its stability time is short, it is conducive to the restoration of landfill sites, and it is easy to operate, so it is widely used. With the increasing awareness of the usability of food waste, the landfill rate of food waste is showing a downward trend, whether in Europe, the United States, Japan or China, and there are even many * * Food waste has been banned from entering landfills. 3. Fertilization treatment The fertilizer treatment methods of food waste mainly include aerobic composting and anaerobic digestion. The aerobic composting process uses extracellular enzymes secreted by aerobic microorganisms to decompose organic solids into soluble organic matter under aerobic conditions, and then penetrates into cells. Through the metabolism of microorganisms, the entire composting process is realized. At the same time, some similar methods have been derived from aerobic composting. For example, vermicomposting is a new technology developed in recent years. Earthworms are used to eat a large amount of kitchen waste and mix it with the soil. Through the mechanical grinding action of the gizzard and the biochemical action in the intestine, the organic matter is converted into nutrients that can be used by themselves or other organisms. Anaerobic digestion of food waste means that under specific anaerobic conditions, microorganisms decompose organic waste, converting carbon, hydrogen, and oxygen into methane and carbon dioxide, while elements such as nitrogen, phosphorus, and potassium remain in the residue and are converted into forms that are easily absorbed and utilized by animals and plants. The disadvantage of the fertilizer treatment of food waste is that the quality of the fertilizer is not high. At the same time, higher-quality composting methods are more expensive and difficult to promote. 4. Feed processing The principle of feed processing of kitchen waste is to use the large amount of organic matter contained in kitchen waste to convert the waste into high-calorie animal feed through crushing, dehydration, fermentation, and separation of soft and hard, turning waste into treasure. At present, my country's food waste treatment technology has become mature, and various types of treatment technologies have been promoted and applied in Shanghai, Beijing, Wuhan, Jinan and other cities. In feed processing, the most important step is fermentation, and many studies in this direction have achieved remarkable results. 5. Energy-based treatment of food waste has emerged rapidly in recent years, mainly including incineration, thermal decomposition, fermentation and hydrogen production, etc. The incineration method has a high efficiency in treating food waste, and ultimately produces about 5% of the residue that is easy to dispose of. The incineration is carried out in a special incinerator, and the heat generated can be converted into steam or electricity, thereby realizing energy recovery and utilization. However, food waste has a high moisture content and low calorific value. It requires the addition of auxiliary fuel during combustion, which causes a large investment problem. At the same time, exhaust gas treatment is also a problem. ； Thermal decomposition method is to pyrolyze garbage at high temperature to convert the energy contained in the garbage into the form of gas, oil and carbon, and then use it. The pyrolysis method has broad application prospects, but the technology has not yet reached the practical stage and is currently rarely used. ； As a high-quality clean energy, hydrogen is generally considered to be the most potential alternative energy source, and many scholars have conducted research on it. The energy-based treatment of food waste will surely receive more and more attention. 6. Others use edible waste oil to vacuum fry kitchen waste, which can achieve the purpose of processing kitchen waste and edible waste oil at the same time. It can not only quickly remove the moisture in the kitchen waste, but also * * Reduce the oxidation rate of fried products, which not only ensures the nutritional content of the garbage, but also performs vacuum disinfection. The fried products can be used as an ideal green feed. ； Extraction of biodegradable plastic technology. In 1999, Japanese scholar Shirai proposed the technology of producing lactic acid through the fermentation of kitchen waste, and then synthesizing biodegradable plastics such as polylactic acid, which opened up a new way to recycle kitchen waste and reduce the cost of lactic acid production. Lactic acid fermentation of food waste can solve the problem of large and difficult-to-treat urban waste and the environmental pollution problems caused by it. At the same time, the biodegradable plastic produced is expected to become a substitute for general-purpose plastics, providing a rich source of raw materials for the plastics industry and solving the problem of white pollution.

At present, projects that rely on food waste to generate electricity are mature.

Food waste power generation projects have matured

It's better to respond accordingly* * call: CD