CN-118270927-B - Preparation method and application of sewage treatment unit based on 3D printing

Abstract

The application belongs to the field of sewage treatment, and particularly relates to a preparation method and application of a sewage treatment element based on 3D printing, comprising the following steps of S1, mixing 40% -45% by mass of unsaturated monomer, 3% -5% by mass of cross-linking agent, 0.5% -0.8% by mass of aqueous light agent, 0.2% -0.3% by mass of light absorbent and the balance of water, and filtering by a membrane filter to obtain basic hydrogel ink for later use; S2, dissolving microorganisms in water, filtering by a membrane filter, adding microorganisms on the membrane filter into a glucose solution, standing to obtain the microorganism glucose solution for standby, S3, mixing the basic hydrogel ink prepared in S1 and the microorganism glucose solution prepared in S2, placing the mixture in a closed space, filling oxygen and mechanically oscillating to obtain biological ink, and S4, adopting a 3D printing technology to obtain the sewage treatment unit. The application develops a sewage treatment unit based on 3D printing, and can be used for sewage treatment rapidly, simply and efficiently.

Inventors

• LIU ZIHAO
• MENG RONG
• ZHANG WENSHENG
• ZHAO ZHILONG
• CUI YUNCHUANG
• LI FANGHUA
• JIANG XIAOLEI
• FENG SHIWEI
• ZHANG BAODE

Assignees

• 国网河北省电力有限公司超高压分公司
• 国家电网有限公司

Dates

Publication Date

20260505

Application Date

20240329

Claims (4)

1. 1. The preparation method of the sewage treatment unit based on 3D printing is characterized by comprising the following steps of: S1, preparing basic hydrogel ink, namely mixing 40-45% of unsaturated monomer, 3-5% of cross-linking agent, 0.5-0.8% of aqueous light-emitting agent, 0.2-0.3% of light absorbent and the balance of water by mass percent, and filtering by a membrane filter to obtain the basic hydrogel ink for later use; s2, preparing a microbial glucose solution, namely dissolving microorganisms in water, filtering the solution through a membrane filter, adding the microorganisms on the membrane filter into the glucose solution, and standing the solution to obtain the microbial glucose solution for later use; s3, preparing the biological ink, namely mixing the basic hydrogel ink prepared in the step S1 with the microbial glucose solution prepared in the step S2, placing the mixture in a closed space, filling oxygen into the closed space, and mechanically oscillating to obtain the biological ink; s4, preparing a sewage treatment element, namely obtaining the sewage treatment element by adopting a 3D printing technology to the biological ink prepared in the S3; s1, the aqueous light-generating agent is polyethylene glycol; S1, the light absorber is riboflavin, and the pore diameter of the membrane filter is 0.22 mu; S2, the pore diameter of the filtering membrane is 0.45 mu, the mass fraction of the glucose solution is 2%, the mass ratio of the microorganism to the glucose solution is 1:15, and the standing time is 48 hours; s3, the mass ratio of the basic hydrogel ink to the microbial glucose solution is 30:1, and when the obtained biological ink is turbid and opaque after oxygen is filled and mechanically vibrated, the biological ink is the required biological ink; and S4, selecting blue light with the wavelength of 400nm and the intensity of 50mw as the 3D printing condition.
2. 2. The method for preparing a sewage treatment unit based on 3D printing according to claim 1, wherein the unsaturated monomer S1 is hydroxyethyl acrylamide.
3. 3. The method for preparing the sewage treatment unit based on 3D printing according to claim 1, wherein the cross-linking agent S1 is polyethylene glycol dimethacrylate.
4. 4. The use of a sewage treatment unit obtained by the sewage treatment unit preparation method based on 3D printing as claimed in any one of claims 1 to 3, characterized in that the sewage treatment unit is used for sewage treatment.

Description

Preparation method and application of sewage treatment unit based on 3D printing Technical Field The application belongs to the field of sewage treatment, and particularly relates to a sewage treatment unit preparation method based on 3D printing and application thereof. Background The waste water of the thermal power plant mainly comes from boiler cooling water, boiler waste water, flue gas desulfurization waste water and the like. These waste waters contain a large amount of harmful substances such as suspended matters, heavy metals, organic matters, inorganic salts, etc., and if discharged directly into the environment, they pollute the water quality and adversely affect the surrounding soil and vegetation. Thermal power plant wastewater treatment is a difficult problem which is faced in the current production, and the improper wastewater treatment can cause great influence on the environment. Therefore, the sewage is treated efficiently, and the improvement of the quality of the water environment is an important work for the current sewage treatment. Common sewage treatment technologies represented by COD reduction mainly include physical, microbiological, chemical and electrochemical methods, and among them microbiological treatment technologies are important and widely used technologies. The microorganism has higher degradation capability, can rapidly degrade organic matters and other pollutants in sewage, improves the treatment efficiency, and simultaneously generates less waste in the microorganism sewage treatment process, thereby being a sustainable sewage treatment technology, effectively reducing the consumption of natural resources and having smaller influence on the environment. The microorganism treatment can remove organic matters, pathogens and toxic substances, can remove odor, improve transparency, reduce chromaticity and the like, and has good treatment effect. However, in the treatment of microorganisms, there are two core problems, no matter what specific scheme is adopted, firstly, inoculation, domestication and propagation of microorganisms, and the existence of suitable microorganism groups is a fundamental guarantee for obtaining good treatment results. On the other hand, carriers, i.e. fillers, which are to have good microbiota growth are used. The surface of the filler is attached with a microbial community, namely a film is produced on the surface of the filler to form continuous biochemical reaction of microorganisms, and sewage can be purified. The current situation is that the energy required for respiration, metabolism, growth and reproduction of microbiota is provided by sewage, which causes a long process and complex links from inoculation to growth of a sufficient number of microbiota as a whole. The filler is a polyhedral space structure made of organic materials, and the microbial population grows on the surface of the filler in a implantation way and forms a hanging film. The film is easy to fall off, and the filler does not contain nutrient substances, so that the energy required by the growth of microorganisms cannot be provided, and the growth, propagation and metabolism of the microorganisms cannot be promoted. Chinese patent with bulletin number CN206735917U discloses a sewage treatment device with a microorganism filtering membrane, which comprises a box body, wherein one end of the box body is provided with a water inlet, the side surface of the other end of the box body is provided with a water outlet, the interior of the box body is provided with a microorganism filtering membrane, and one side of the microorganism filtering membrane is provided with a microorganism culture bed. The utility model utilizes the fact that microorganism strains cultured in the microorganism culture bed continuously enter the microorganism filter membrane along with water flow, provides and supplements the microorganism strains for the microorganism filter membrane for purifying sewage, and can effectively avoid the condition that the microorganisms on the microorganism filter membrane are consumed, but the main source of nutrient substances required by the microorganism growth in the microorganism culture bed in the application is sewage, so that the stable growth of the microorganisms is difficult to ensure. The Chinese patent with publication number CN113248004B discloses a preparation method of a sewage treatment microorganism carrier, which avoids shrinkage in a temperature reduction state of polyvinyl alcohol resin to squeeze and crack through adding a wooden spherical cage in a polyethylene spherical film, and loses the function of frying a cavity in the polyvinyl alcohol resin, and meanwhile, the cellulase mixed into microorganism powder can decompose the wooden spherical cage in the sewage treatment process along with microorganisms, so that an additional glucose source is provided for the microorganisms, and the metabolic activity of the microorganisms is enhanced. The 3D