Three-dimensional fused and deposited biological film filler as well as preparation method and application thereof

A biofilm and mixture technology, applied in the field of materials, can solve the problems of difficulty in timely replenishment and real-time control of micronutrient elements, and achieve the effect of improving water treatment effect, easy to hang film, and difficult to block.

Active Publication Date: 2016-07-13
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this problem can be alleviated by adding an appropriate amount of micronutrient elements to the wastewater, this one-time feeding method cannot accurately control the micronutrient elements in real time according to the growth of microorganisms. When it is exhausted, it is difficult to replenish it in time, so it is difficult to truly solve the negative impact of the lack of micronutrients on microbial growth and metabolic speed

Method used

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  • Three-dimensional fused and deposited biological film filler as well as preparation method and application thereof
  • Three-dimensional fused and deposited biological film filler as well as preparation method and application thereof
  • Three-dimensional fused and deposited biological film filler as well as preparation method and application thereof

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preparation example Construction

[0026] In one aspect of the present invention, the present invention provides a method for preparing a biofilm filler. According to an embodiment of the present invention, the biofilm filler prepared by the method has the function of sustained release of metal elements, and the preparation method has simple process, readily available materials, low cost and short cycle. Specifically, the method includes:

[0027] S100: forming a porous matrix

[0028]According to an embodiment of the present invention, in this step, polypropylene is used to form a porous matrix by 3D printing. Specifically, in this step, by setting the relevant parameters in the 3D printing step, for example, by designing parameters such as the thickness, shape, and printing accuracy of the porous matrix according to the CAD digital model software, it is possible to use polypropylene to form a matrix with a porous structure. . The specific surface area of ​​the porous matrix is ​​260-300m 2 / m 3 . When t...

Embodiment 1

[0056] The FANTASYPro dual-nozzle three-dimensional fusion rapid prototyping (3D printing) machine (EcubMaker) was used for the preparation of biological fillers. First, according to the CAD digital model software, it is designed into a shape of multi-vacant columnar packing, and the temperature is set at 210 degrees Celsius. Polypropylene is fused deposited through a spray head to form a porous matrix.

[0057] Then, according to the designed 2mm slow-release layer thickness, use another nozzle in the FANTASYPro molding machine to deposit the nanoparticle mixture slow-release layer on the inner side and upper surface of the porous matrix. The temperature is set at 220 degrees Celsius, and the nanoparticle mixture includes polypropylene, polyethylene glycol, maleic anhydride, antioxidant 1010, polylactic acid and zinc oxide nanoparticles, and the mass ratio is 74.41:3.68:1.16:18.4:2.32:0.97. The obtained packing density is 0.92g / cm 3 .

[0058] Then heat-treat the biologica...

Embodiment 2

[0060] The biofilm filler prepared in Example 1 was used for wastewater treatment. The target wastewater to be treated is printing and dyeing wastewater of knitted fabrics, in which the pH value of the wastewater is 10, the chroma is 250 times, the BOD value is 220mg / L, the COD value is 800mg / L, and the suspended matter is 200mg / L. The activated sludge is taken from a sewage treatment plant, and it is cultivated and domesticated so that it can stably treat printing and dyeing wastewater. The activated sludge system is added to the ordinary biofilm filler and the new type of trace metal element slow-release suspended biofilm filler respectively. In the waste water, the MLSS in the waste water is 4000mg / L, the sludge load is 0.2kgCOD / kgMLSS·d, the filling rate of the filler is 40%, and the uninterrupted air compressor is used for aeration operation, accompanied by stirring, and the dissolved oxygen is maintained at 2.8g / L about. After three days of continuous treatment, the COD...

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Abstract

The invention discloses a three-dimensional fused and deposited biological film filler as well as a preparation method and application thereof. The method comprises the following steps: (1) adopting polypropylene to form a porous matrix through 3D printing; (2) adopting a nano particle mixture to form sustained release layers on the side wall and upper surface of the porous matrix through 3D printing so as to obtain a sustained release layer-porous matrix composite; and (3) carrying out thermal treatment and ultraviolet-light treatment on the sustained release layer-porous matrix composite in sequence to obtain the biological film filler. The biological film filler prepared by the method can provide trace nutrient substances needed for microbial growth in a sustained release manner during use, so that the biological film growing speed, growing amount and water treatment efficiency of the filler can be improved.

Description

technical field [0001] The invention relates to the field of materials, in particular, the invention relates to a three-dimensional fused deposition biofilm filler, a preparation method and an application thereof. More specifically, the present invention relates to a method for preparing a biofilm filler, a biofilm filler and the use of the biofilm filler in sewage treatment. Background technique [0002] my country is a country seriously short of water, and the shortage of water resources is becoming more and more serious. The per capita water resources are only 1 / 4 of the world average. And with the development of my country's economy, the consumption of industrial water resources is huge, and the amount of wastewater discharge is also large. Therefore, improving the recycling rate of industrial wastewater is of great significance to solve the problem of water shortage. At present, the biological contact oxidation method is usually used in the treatment of industrial wast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/34C02F3/10
CPCC02F3/00C02F3/104C02F3/105C02F3/108C02F3/34C02F2003/001Y02W10/10
Inventor 周律贾奇博
Owner TSINGHUA UNIV
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