Recycling of gutter oil or use as roof coating in

During the World Expo, the recycling of pilot gutter oil or its use as roof coating has attracted great attention again. From the unauthorized refining of underground factories to the flow of these clear and dirty "gutter oil" into the table, people are worried about whether it will become another "melamine" incident. Similarly, government departments are also concerned about the flow of such illegal oil products. In a recent interview, it was learned that in order to better collect "gutter oil", the Shanghai municipal greening and city appearance management department plans to create a recycling bucket specially designed for "gutter oil" for special recycling, which is expected to be used as a pilot during the Expo as soon as possible

the business of testing institutions began to "prosper"

"during this period of time, there are obviously more customers coming to consult about how to detect 'gutter oil'." After the frequent reports of "gutter oil" in relevant media, the person in charge of a bioengineering company in Shanghai that provides free testing of oil samples told that recently, many people have received calls in succession. A large part of the questions asked are related to whether there is testing technology to quickly identify "gutter oil"

it is understood that the "detector" provided by this company is called the rapid detection kit, which takes "thin layer chromatography" as the basic principle. If "gutter oil" is encountered, an obvious trailing spot will appear on the silica gel plate of TLC in this kit. "There must be many different substances between 'gutter oil' and normal oil. Theoretically, by analyzing the content and types of these substances, we can determine whether the quality of oil is good or bad." Gaochenhao, the person in charge of the company's service, told me. However, facing the increasingly popular "door-to-door business", Gao Chenhao did not show special excitement. "It is good for the society to pay attention to 'gutter oil', but China has not yet developed a rapid and effective detection product." He said that although the company's rapid detection kit can preliminarily screen oil samples, the computer is the core part of the tensile testing machine. To "diagnose", we have to rely on laboratory instruments. In the future, mature detection technologies and products must allow law enforcement personnel to make basic judgments on the spot

Gao Chenhao said that the current problem for testing institutions is the unclear standard of "gutter oil". The term "gutter oil" is often a general term for all kinds of inferior oil in life, but when government departments manage it, they need to use clear standards to define whether it is illegal. Therefore, at present, some law enforcement agencies are particularly interested in the detection of "gutter oil"

he has 39 years of experience in the plastic industry, and plans to launch a special recycling bucket for "gutter oil"

to prevent "gutter oil" from entering the catering industry, supervision and management is the key. "'gutter oil 'is different from ordinary kitchen waste. The former is both waste and resource, which needs special treatment in the process of collection and transportation." The relevant person in charge of the Shanghai municipal waste management office told that the municipal greening and appearance Bureau was planning to launch a special recycling bucket for "gutter oil". In addition to having sufficient tightness and safety performance, the recycling bucket also had to be made of exquisite materials. Currently abandoned ρ About 1.24g/cm3, the pipe office is jointly designing with the manufacturer. The special recycling bucket is divided into 60 liters and 30 liters, and it is planned to be used on a pilot basis during the Expo

however, this measure is not mandatory. The person in charge said that the purpose of promoting these special recycling barrels is to let catering enterprises take the initiative to collect "gutter oil" and hand it over to the environmental sanitation department. However, for catering enterprises, whether they can take the initiative to recycle the oil and then put it into special recycling barrels is still a problem. Because for some catering enterprises, it is better to sell these oil traders directly to illegal recyclers to obtain illegal profits than to collect "gutter oil" and hand it over to the environmental sanitation department while paying disposal fees. "Therefore, the management of 'gutter oil' also requires the participation of all law enforcement departments."

"gutter oil" has great potential to become treasure.

it is understood that after the city put forward the requirements for the resource utilization of domestic waste in 2005, the environmental health department has tried to legalize and "incorporate" some original waste oil disposal plants in various districts of Shanghai. "Gutter oil" is expected to be transformed into "biofuel" and chemical raw materials such as oleic acid and stearic acid through technical means. The disposal of "gutter oil" is also strictly controlled by the management department to prevent these oils from entering people's tables. However, it is understood that although the "biofuel" that finally produced the basic situation of rotating friction has a good market, due to the lack of sufficient "gutter oil", a considerable part of the production capacity has been idle, so the business is also relatively bleak

in fact, there are many "tricks" in the resource utilization of "gutter oil". American researchers have found that waste edible oil can be converted into a liquid compound. This compound will harden after use. If it is used as roof paint, it will absorb or reflect heat according to the change of temperature. The result is to reflect light and release heat in hot days, and absorb light and save heat in cold days; The Japanese government paid to buy "gutter oil" from professional recycling companies to prevent these oil from entering the market; Professional recycling companies collect these oils from catering enterprises, and eventually these oils are made into bio gasoline, which can be used by sanitation vehicles

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