One of the most important products in the resource utilization of kitchen waste is kitchen waste oilKitchen waste oil, commonly known as“gutter oil”What is it used for? Is it true that it eventually flowed back to the dining table for reuse? This is definitely not it!

After the treatment of kitchen waste, kitchen waste oil can be more effectively utilized in various ways. The following are some common ways of utilization:

1、 Industrial raw materials

After deep refining, kitchen waste oil can be used as a lubricating base oil, and after special treatment, it can be used as a leather fatliquor. Soap raw materials can be produced through saponification reaction.

2、 Environmentally friendly power generation

The mixed incineration of kitchen waste oil and household waste for power generation has a calorific value of about 35MJ/kg, but strict control of chlorine content (<3%) is required to avoid the generation of dioxins.

3、 Production of biodiesel

Kitchen waste oil is converted into fatty acid methyl esters (biodiesel) through ester exchange reactions. This biodiesel can be used as a blending component for automotive diesel and aviation fuel, and is a renewable clean fuel that can reduce dependence on fossil fuels and reduce combustion emissions by over 80%. Each ton of waste oil can produce about 950 liters of biodiesel, and the market price remains stable at 6-8 yuan/liter.

4、 Organic fertilizer additives

Properly processed waste oil can improve composting efficiency and soil structure, making it suitable for agriculture or landscaping.

5、 Insect breeding feed

Insects such as black soldier flies can decompose waste oil and convert it into high protein feed, achieving ecological recycling and reducing breeding costs.

6、 Sell to qualified bio oil manufacturers

The separated crude oil can be sold directly, and the price varies depending on the region and quality. For example, some factories sell biomass waste oil at a price of 6000 yuan/ton per month.

It can be seen that the "rebirth journey" of kitchen waste oil is far more than just simple waste utilization. It profoundly interprets the core concepts of "circular economy" and "waste free city", transforming the "burden" of urban metabolism into new resources for development.