1, fatty acids react with methanol to produce biodiesel and water: esterification.
2. Glyceryl ester reacts with methanol to produce biodiesel and glycerol: that is, transesterification reaction, also called alcoholysis reaction.
With the rapid development of economy, the catering industry is increasingly developed, which leads to the continuous increase of kitchen waste oil, which has caused serious environmental pollution.
A few unscrupulous employees even mix the waste oil after refining and even disguise it as edible oil, and return it to restaurants and edible oil markets, which seriously harms people's health.
So how did the gutter oil that people hated turn into green energy and enter the gas station?
As we know, the main pollutants in catering wastewater are oils, dietary fiber, starch, various condiments, detergents, protein and other organic substances. At the same time, due to the complexity of diners, there is also the problem of pathogen pollution.
If it is directly discharged into rivers or municipal sewage pipelines, it will seriously pollute the environment, and oil will easily condense on the inner wall of municipal pipelines, reducing the water capacity and even blocking. Therefore, it must be treated and meet the national discharge standards before it can be discharged into urban pipe networks or other water bodies.
Fockling environmental protection integrated closed grease trap has the functions of slag removal, oil removal and sewage lifting, which can effectively reduce the grease in catering wastewater. Leave the separated grease, that is, waste oil, to a professional unit for treatment.
Waste edible oil can be converted into biodiesel (fatty acid methyl ester or ethyl ester) through esterification and transesterification, which is essentially different from petroleum diesel, and its main components are esters and hydrocarbons.
The performance of the converted biodiesel is very close to that of petroleum diesel, but it is more environmentally friendly and affordable. When biodiesel is used as automobile fuel, it can reduce the emission of 80% carbon dioxide and 100% sulfur oxide.
It is understood that more than 200 B5 biodiesel gas stations (5% biodiesel and 95% fossil diesel) have been used, and more than 3,000 social vehicles are filled with biodiesel every day. In Shanghai, biodiesel made from kitchen waste oil has entered the market.