Generally speaking, gutter oil can be divided into the following categories: first, gutter oil in a narrow sense, that is, oily floating objects in sewers or leftovers from hotels and restaurants (commonly known as swill) are simply processed and refined; The second is the oil produced by the processing and refining of inferior pork, pig offal and pig skin; Third, the oil for fried food should be reused after the number of uses exceeds the specified requirements, or reused after adding some new oil to the oil.
What are the hazards of waste oil?
In favor: producing biodiesel from waste oil. According to experts, after the waste oil is added into the reaction tank, alcoholysis and esterification can be carried out at the same time through the technology of slightly acidic catalyst, and the reaction speed is obviously accelerated. In addition, the key problem of high residual acid value in diesel oil production from waste animal and vegetable oil is solved by using metal salt treatment agent. These two key technologies reduce the production cost of biodiesel and make biodiesel enter the production workshop from the laboratory. The biggest feature of this fuel is its good environmental protection. The tail gas emitted by diesel vehicles does not contain sulfur dioxide, and hydrocarbons and carbon monoxide are greatly reduced.
Disadvantages: Garbage oil is a kind of non-edible oil, with poor quality and extremely unsanitary, and its peroxide value, acid value and moisture content seriously exceed the standard. Containing toxins, flowing into rivers will cause eutrophication of water bodies. Once eaten, it will destroy white blood cells and digestive tract mucosa, cause food poisoning and even cause cancer. Frying oil, one of the "vegetable oils", is repeatedly used at high temperature for a long time, and comes into contact with oxygen in the air, resulting in complex reactions such as hydrolysis, oxidation, polymerization, etc., which increases the viscosity of the oil, deepens the color, increases the peroxide value, and produces some irritating substances such as volatiles, aldehydes, ketones and lactones, which have carcinogenic effects. Medical research shows that the toxicity of aflatoxin, the main hazard in waste oil, is 100 times that of arsenic.
First, so is the sewer. Gutter oil is the residue of domestic oil accumulated in sewers for many years. Nowadays, many black-hearted vendors go to restaurants and other places that use a lot of cooking oil, take out the oil that people washed into the sewer from their ditches, and then reuse it directly ... Especially in Shenzhen, roadside food stalls and breakfast vendors use waste oil obviously. The most shocking thing is that a large chain restaurant "xx Frog" in Shenzhen also found the use of swill oil, but now the Shenzhen Health Bureau has strictly controlled most regular businesses, but the problem of many roadside snacks is still very serious.
Second, there is no obvious difference in color and taste between mixed gutter oil and general bulk edible oil.
3. According to the experimental determination, the rancidity index of "gutter oil" far exceeds the national regulations. If ingested for a long time, people will lose weight, have developmental disorders, be prone to diarrhea and enteritis, and have diseases such as liver, heart and kidney enlargement and fatty liver. In addition, aflatoxin produced by gutter oil pollution is not only easy to cause liver cancer, but also can cause tumors in other parts, such as gastric adenocarcinoma, renal cancer, rectal cancer, breast cancer, ovary and small intestine.
Anorectal experts explained that "gutter oil" is indeed the enemy of people's health, especially for people's gastrointestinal health, which has immeasurable destructive power.
First, "gutter oil" can lead to indigestion.
In the process of refining "gutter oil", a series of chemical changes, such as rancidity, oxidation and decomposition, occur after animal and vegetable oils are polluted, resulting in substances that are highly toxic to human body; Arsenic is one of them. Once people use "waste oil" containing a lot of arsenic, it will cause symptoms such as indigestion, headache, dizziness, insomnia, fatigue and discomfort in the liver area.
Second, "gutter oil" can cause diarrhea.
The production process of "gutter oil" is doomed to be unsanitary. Once a large number of harmful microorganisms such as bacteria and fungi reach people's intestines, it will cause diarrhea and even a series of gastrointestinal diseases such as nausea and vomiting.
Third, "gutter oil" can cause intense abdominal pain.
The "gutter oil" is mixed with a lot of sewage, garbage and detergent. After outdoor refining in underground workshop, bacteria and harmful chemical components cannot be removed. It is an indisputable fact that all "gutter oil" will have a serious lead content exceeding the standard. Eating food made from "gutter oil" with excessive lead content will cause serious abdominal cramps, anemia, toxic liver disease and other symptoms.
Fourth, "gutter oil" can lead to gastric cancer and intestinal cancer.
The disgusting refining process is the cause of the breeding of gutter oil toxins. "Waste edible oil" is a refined oil made from swill (swill, leftovers, etc.). ) and waste edible oil collected from hotels and restaurants to remove odor and flow to the edible oil market. Gutter oil contains aflatoxin and benzopyrene, both of which are carcinogens, which can cause gastric cancer, intestinal cancer, renal cancer and cancers of breast, ovary and small intestine.
Anorectal experts remind consumers that once they have symptoms such as abdominal pain, nausea and vomiting after eating in restaurants, food stalls or vendors, they must go to the hospital as soon as possible to avoid causing more harm to your health.
Waste cooking oil is a kind of poor quality and unsanitary non-edible oil, and its peroxide value, acid value and moisture content seriously exceed the standard. Containing toxins, flowing into rivers will cause eutrophication of water bodies. Once eaten, it will destroy white blood cells and digestive tract mucosa, cause food poisoning and even cause cancer. Frying oil, one of the "vegetable oils", is repeatedly used at high temperature for a long time, and comes into contact with oxygen in the air, resulting in complex reactions such as hydrolysis, oxidation, polymerization, etc., which increases the viscosity of the oil, deepens the color, increases the peroxide value, and produces some irritating substances such as volatiles, aldehydes, ketones and lactones, which have carcinogenic effects. The toxicity of aflatoxin, the main hazard in swill oil, is 100 times that of arsenic.