If the kitchen waste is directly poured into the sewer, oil, water and residue will cause condensation and blockage in the sewer, ferment and heat up in the closed space, and at the same time produce a large amount of methane gas, which will easily cause a powerful explosion accident of gas eruption, causing personal injury and great damage. In recent years, such accidents have occurred many times.
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Some oil, water and residues directly flow into rivers from urban sewage pipes, and toxic and harmful substances directly enter water bodies with turbid flow, which seriously affects the water environment. If it is not treated, it will be discharged into the river bank at will, and the sewage will flow into the surrounding water body with the surface runoff, which will pollute the water body in a large area.
In addition, due to the inherent oily and perishable characteristics of kitchen waste, open-air placement and simple landfill will also bring secondary pollution to underground water sources.
Harm of kitchen waste II
Do you know how serious the harm of kitchen waste is?
2. Waste oil flows into the market, which brings great hidden dangers to food hygiene and safety.
According to the investigation, the kitchen waste is recycled by some lawless elements. The processing and refining process of the recycled kitchen waste is secret, the location is hidden, the surrounding environment is bad and the smell is unpleasant. Take a large iron pot as a container, and the surface is covered with toothpicks, napkins, plastic bags and other pollutants. Using the difference of oil-water ratio, the surface grease is extracted by simple heating, which is processed into "hogwash fat". The extracted "hogwash fat" contains a lot of toxic and harmful substances, among which highly toxic aflatoxin is the strongest chemical carcinogen found at present, and its toxicity is 100 times that of arsenic.
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People will suffer from dizziness, nausea, vomiting, diarrhea, insomnia, fatigue, indigestion, severe abdominal cramps and other poisoning symptoms after eating. Anemia, malnutrition and visceral injury will occur after long-term consumption, leading to weight loss and developmental disorders in children. In severe cases, toxic liver disease may also occur, inducing gastric adenocarcinoma, renal cancer, breast cancer, ovarian cancer and small intestine cancer.
Some "hogwash oil" was disguised as "refined edible oil" by illegal traders and sold to street vendors and some food factories, which were used to fry oil cakes, fried fritters and make biscuits, and added to edible oil products to make pepper oil, Chili oil and chafing dish bottom materials. It is extremely harmful to human health.
Harm of kitchen waste 3
Do you know how serious the harm of kitchen waste is?
3. The kitchen waste is directly used as pig feed, which is seriously harmful to human health.
It is understood that a large part of the city's kitchen waste is bought by the surrounding pig farmers to feed the "garbage pigs". Some hotels do not pour swill, but sell it to individual pig farmers, who only need to heat the collected swill and use it as pig feed directly.
According to the data reported by the World Health Organization and the Food and Agriculture Organization of the United Nations, there are more than 90 zoonotic infectious diseases infected by animals, of which 25 are infected by pigs. The vectors of these diseases are mainly pathogenic microorganisms in contaminated livestock and poultry products and their excreta.
Because of the high oil content and animal protein content in decanted water, kitchen waste is easy to rot and mold, and its composition is complex. It contains chemicals such as polychlorinated biphenyls, toxins such as nitrite, and a large number of toxic and harmful components such as germs and bacteria. It is not only easy to be infected with salmonella, Escherichia coli and other 10 diseases, but also easy to be infected with mad cow disease, foot-and-mouth disease, tuberculosis, hepatitis and so on.
If the detergent (containing phosphorus, lead, mercury, etc. ) All restaurants are mixed with swill, which will be deposited on pigs after being eaten by pigs, which will lead to excessive heavy metals in pork and be more harmful to human body.
Harm of kitchen waste 4
Do you know how serious the harm of kitchen waste is?
4. There are great hidden dangers in the mixed treatment of kitchen waste and domestic waste.
If the kitchen waste is not treated separately, it will be harmful to the existing landfill and incineration terminal disposal if it enters the municipal domestic waste terminal disposal facilities.
If municipal solid waste is burned, the water content of kitchen waste is as high as 90%, and the calorific value is 2 100-3 100 kJ/kg. If it is burned together with other garbage, it will not meet the calorific value requirements of garbage incineration power generation, but it will lead to insufficient combustion in the incinerator and produce dioxins.
If buried with domestic waste, the oil content and water content of kitchen waste are extremely high. In the process of landfill operation, high oil content will block the gravel diversion layer, cause poor drainage of internal leachate, increase the water content of landfill pile, and may lead to serious events such as groundwater pollution. At the same time, a large amount of grease in kitchen waste is easy to burn and explode at high temperature, which has serious safety hazards.