Gutter oil is actually a general concept, which is a general term for all kinds of inferior oils in people's lives.
Types of gutter oil
Generally speaking, gutter oil can be divided into the following categories: first, gutter oil in a narrow sense, that is, greasy floating objects in sewers or hotels.
Leftovers (commonly known as swill) are simply processed and refined oil; The second is the processing and refining of inferior pork, pig viscera and pig skin.
Oil; 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.
Advantages and disadvantages of waste oil
In favor: producing biodiesel from waste oil. According to experts, after the waste oil is added to the reaction tank, it is alcoholized by the technology of slightly acidic catalyst.
The reaction speed is obviously accelerated. In addition, the problem of using waste animal and vegetable oil to produce firewood is solved by using metal salt treatment agent.
Key problems of high acid value of oil residue. These two key technologies reduce the production cost of biodiesel and make biodiesel enter production from laboratory.
Workshop. The biggest feature of this fuel is its good environmental protection. The tail gas emitted by diesel vehicles does not contain sulfur dioxide and is hydrogenated.
Compounds and carbon monoxide are also 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. It contains toxins and flows to rivers.
It will cause eutrophication of water, and once eaten, it will destroy white blood cells and digestive tract mucosa, cause food poisoning and even cause cancer. One of the "vegetable oils"
After being used repeatedly at high temperature for a long time, frying oil comes into contact with oxygen in the air, and complex reactions such as hydrolysis, oxidation and polymerization occur, which increases the viscosity of the oil.
When added, the color deepens and the peroxide value increases, resulting in some irritating substances such as volatiles, aldehydes, ketones and lactones, which are carcinogenic.
Function. The toxicity of aflatoxin, the main hazard in swill oil, is 100 times that of arsenic. 2 O' Z( K) _8？ ) `
First, so is the sewer. Gutter oil is the residue of domestic oil accumulated in sewers for many years. Now many black-hearted vendors go to eat.
Shops and other places that use a lot of cooking oil take out the oil that people have washed into sewers from their ditches and then reuse it directly ... especially.
Shenzhen is the most prominent, and the phenomenon that roadside food stalls and breakfast vendors use gutter oil is obvious. The most shocking thing is a large chain restaurant in Shenzhen, "xx field".
Chicken also found the incident of using swill oil, but now Shenzhen Health Bureau has strictly controlled most regular businesses, but many roadside snacks still have problems.
Very serious.
Second, there is no obvious difference in color and taste between mixed gutter oil and general bulk edible oil.
Thirdly, according to the experimental determination, the rancidity index of "gutter oil" far exceeds the national regulations, and long-term use will make people lose weight and develop obstacles.
It is easy to suffer from diarrhea and enteritis, and has diseases such as liver, heart and kidney enlargement and fatty liver. In addition, aflatoxin produced by gutter oil pollution is not only easy to make people
Liver cancer can also occur in other parts, such as gastric adenocarcinoma, renal cancer, rectal cancer, breast cancer, ovarian cancer, small intestine and other parts of the cancer.