Method for producing degradable plastics by using activated sludge

Abstract

The invention relates to a method for producing degradable plastics by using activated sludge, which comprises the following steps: 1) adding the following substance components in parts by weight into a mixing machine and uniformly mixing: 25-45 parts of activated sludge powder, 15-35 parts of high molecular material, 10-25 parts of fiber powder, 5-15 parts of activated carbon powder, 10-20 parts of adhesive and assistants, wherein the assistants comprise sodium stearate, coupling agent and compatilizer; the mass of the sodium stearate is 2% of that of the activated carbon powder; the mass of the coupling agent is 1% of that of the activated carbon powder; and the mass of the compatilizer is 3-5% of the total mass; and 2) plastifying and extruding the mixture obtained in the step 1) through a single screw extruder, granulating, and performing secondary processing to obtain the biodegradable plastics. The method uses wastes in life, sludge and straws, as the raw materials, realizes reutilization of the wastes, and avoids secondary pollution brought by the existing sludge treatment method; and the obtained plastics can be completely degraded to serve as a fertilizer for improving soil. Thus, the method has the characteristics of low carbon, environment friendliness, simple process, high production efficiency and low cost.

Description

technical field [0001] The invention relates to a method for producing degradable plastics by using activated sludge as the main material, in particular to sewage treatment, waste utilization, and production of environmentally friendly materials. Background technique [0002] With the development of economy and society, more and more domestic and industrial wastewater discharges have seriously affected my country's water environment, especially the increasing amount of sludge. According to statistics, the amount of sludge at the bottom of Taihu Lake is 67 million cubic meters, and the Pearl River Delta It has an area of ​​80 million cubic meters, which will affect water quality and shipping. In the past, the sludge discharge method was to transport the sludge to the garbage station for natural weathering, which would pollute the air again and waste material and financial resources. [0003] In the past, the sludge generated in the sewage project was disposed of by stacking or...

AI Technical Summary

Problems solved by technology

[0002] With the development of economy and society, more and more domestic and industrial wastewater discharges have seriously affected my country's water environment, especially the increasing amount of sludge. According to statistics, the amount of sludge at the bottom of Taihu Lake is 67 million cubic meters, and the Pearl River Delta There are 80 million cubic meters in the area, which will affect water quality and shipping. In the past, the sludge discharge method was to transport the sludge to the garbage station for natural weathering, which will pollute the air again and waste material and financial resources

[0003] In the past, the sludge generated in the sewage project was disposed of by stacking or discarding, which not only caused a lot of waste of land resources, but also caused irreparable damage to the ecological environment, and the heavy metal ions and organic compounds contained in the sludge It will cause secondary pollution to the surrounding soil and air

[0004] In addition, some traditional degradable plastics will inhibit the growth of crops after degradation, such as PBS

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