Polyethylene biofilm carrier material and preparation method thereof
A technology of biofilm carrier and polyethylene, applied in the direction of sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve problems such as high cost, complicated molding process, difficult control of pore size and structure, and achieve Reduce production costs, increase processing speed, and reduce production costs
Active Publication Date: 2021-08-06
SICHUAN UNIV
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Problems solved by technology
However, the formation of these fillers requires high temperatures above 1000 degrees Celsius, the molding process is complicated, and the pore size and structure are difficult to control
In summary, the current problems of biological fillers mainly focus on high cost, difficult preparation and low efficiency of loading microorganisms.
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[0037] A kind of preparation method of polyethylene biofilm carrier material of the present invention, comprises the steps:
[0038] (1) Mix polyethylene, polyethylene oxide, and calcium carbonate uniformly to obtain a mixture; wherein, the amounts of polyethylene, polyethylene oxide, and calcium carbonate of different sizes are specifically referred to in Table 1.
[0039] (2) melting and mixing the mixture obtained in step (1) through a twin-screw extruder to obtain a ternary compound;
[0040] (3) cooling the ternary compound obtained in step (2), and then producing particles with a length of 2 to 20 mm to obtain ternary compound particles;
[0041] (4) immersing the ternary composite particles obtained in step (3) into water, washing away the polyethylene oxide in the ternary composite particles, filtering and rinsing to obtain binary composite particles;
[0042] (5) Put the binary composite particles obtained in step (4) into an acid solution, remove the calcium carbona...
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Abstract
The invention discloses a polyethylene biofilm carrier material and a preparation method thereof, comprising the following steps: uniformly mixing polyethylene, polyethylene oxide and calcium carbonate to obtain a mixture; melting the obtained mixture through a twin-screw extruder Mixing to obtain a ternary compound; cooling the obtained ternary compound, and then producing particles with a length of 2 to 20 mm to obtain ternary compound particles; immersing the obtained ternary compound particles in water, washing away the polyethylene oxide in the ternary composite particles, filtering and rinsing to obtain the binary composite particles; putting the obtained binary composite particles into an acid solution to remove the carbonic acid in the binary composite particles Calcium, and then washed with water to obtain porous polyethylene particles. The method of the invention has high efficiency, simple process and can reduce production cost. The polyethylene biofilm carrier material of the invention can more effectively treat water, and has the advantages of environmental protection, low energy consumption and simple processing equipment.
Description
technical field [0001] The invention relates to the technical field of preparation of polyethylene biofilm carrier materials, in particular to a preparation method of polyethylene biofilm carrier materials and polyethylene biofilm carrier materials prepared by the method. Background technique [0002] Biofilm method is a kind of wastewater aerobic biological treatment technology, which mainly removes soluble and colloidal organic pollutants in wastewater. As the habitat of microorganisms, the biofilm carrier filler is the core of the biofilm method, which directly affects the growth, reproduction and activity of microorganisms, and then affects the treatment efficiency of the device. There are many types of biological fillers at home and abroad, which can be divided into fixed biological fillers, suspended biological fillers, and suspended biological fillers according to the installation method. [0003] Fixed biological filler refers to the filler that is fixed as a whole ...
Claims
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IPC IPC(8): C08J9/08C08L23/06C08L71/02C02F3/10
CPCC02F3/108C08J9/0061C08J9/08C08J2323/06C08J2371/02Y02W10/10
Inventor 钟淦基赖波谢旭龙徐家壮李忠明
Owner SICHUAN UNIV