Composite biofilm carrier for sewage treatment and preparation method thereof

Abstract

The invention discloses a composite biofilm carrier for sewage treatment and a preparation method thereof. The carrier is composed of solid filler and a coating arranged on the surface of the solid filler in a wrapping mode. The filler is in a honeycomb straight inclined tube shape, a ripple shape, a cubic shape, a cylinder shape or a fiber shape. The surface of the carrier is beneficial to growth of a biofilm, and it is convenient to improve sewage treatment efficiency; it is convenient to regulate and control density of the biofilm carrier, and the carrier is adapted to requirements for treatment of different types of sewage. In addition, due to the fact that a degradable material is adopted as the surface material of the biofilm carrier, as the degradable material is decomposed gradually, the aged biofilm carrier falls off automatically, after the biofilm falls off, the polymer carrier is taken out, the biofilm carrier can be reused after being coated with the degradable material again, therefore the defects that the biofilm is excessively thick and prone to heading formation and blocks a packed bed are overcome, and the manufacturing and use cost of the biofilm carrier is saved. The invention further discloses a preparation method of the composite biofilm carrier, and the method is simple and feasible.

Description

technical field

[0001] The invention belongs to the technical field of sewage treatment and polymer composite materials, and in particular relates to a composite biofilm carrier for sewage treatment and a preparation method thereof. Background technique

[0002] Biofilm sewage treatment technology has been widely recognized in the practical application of controlling point source pollution and non-point source pollution, and is one of the sewage treatment technologies. The development of biofilm carrier plays a key role in the development of biofilm sewage treatment technology. The carrier has a significant impact on the growth, structure and activity of biofilm, which is crucial to improving the treatment efficiency of biofilm reactors and reducing operating costs. important role. The traditional preparation method is to graft biocompatible materials on the surface of the biofilm carrier by surface modification or increasing the specific surface area, so as to increase the...

Examples

Embodiment 1

[0030] refer to figure 1 as shown, figure 1 Indicates the carrier structure of honeycomb straight inclined tube, in which 1 means the filler shaped like a honeycomb straight inclined tube, and 2 means the coating coated on the surface of the carrier.

[0031] The preparation method of the carrier is as follows:

[0032] 1) Press the PP filler into a solid filler of honeycomb straight inclined tube type by using a mold;

[0033] 2) dissolving polylactic acid in dichloromethane, dissolving, adding silicate at the same time, preparing polylactic acid-silicate solution;

[0034] 3) immersing the solid filler prepared in step 1) into the solution prepared in step 2) to coat the surface of the filler with polylactic acid and silicate;

[0035] 4) Ventilate and dry the solid filler coated in step 3), and completely volatilize the dichloromethane in the solution to obtain a composite biofilm carrier of polylactic acid-silicate coating coated PP filler

[0036] figure 2 Represent...

Embodiment 2

[0040] The packing of the support structure is corrugated:

[0041] The preparation method of the carrier is as follows:

[0042] 1) Mix ceramic particles and calcium alginate and use a mold to press into a solid filler of honeycomb straight inclined tube type;

[0043] 2) dissolving starch and calcium sulfate in dichloromethane to form a solution;

[0044] 3) immersing the solid filler prepared in step 1) into the solution prepared in step 2) to coat the surface of the filler with a coating;

[0045] 4) ventilating and drying the solid filler coated in step 3) to obtain a composite biofilm carrier.

[0046] The carrier prepared in Example 2 was subjected to a biofilm growth experiment, and it can also achieve biofilm fixation and film-hanging maturation, and has good decontamination ability.

Embodiment 3

[0048] The filler of the carrier structure is of fibrous type:

[0049] The preparation method of the carrier is as follows:

[0050] 1) Mix glass pellets and polyethylene terephthalate and use a mold to press into a honeycomb straight inclined tube-shaped solid filler;

[0051] 2) dissolving aliphatic polyester and diatomaceous earth in dichloromethane to form a solution;

[0052] 3) immersing the solid filler prepared in step 1) into the solution prepared in step 2) to coat the surface of the filler with a coating;

[0053] 4) ventilating and drying the solid filler coated in step 3) to obtain a composite biofilm carrier.

[0054] The carrier prepared in Example 3 was subjected to a biofilm growth experiment, and it can also achieve biofilm fixation and film-hanging maturation, and has good decontamination ability.

technical field

[0001] The invention belongs to the technical field of sewage treatment and polymer composite materials, and in particular relates to a composite biofilm carrier for sewage treatment and a preparation method thereof. Background technique

[0002] Biofilm sewage treatment technology has been widely recognized in the practical application of controlling point source pollution and non-point source pollution, and is one of the sewage treatment technologies. The development of biofilm carrier plays a key role in the development of biofilm sewage treatment technology. The carrier has a significant impact on the growth, structure and activity of biofilm, which is crucial to improving the treatment efficiency of biofilm reactors and reducing operating costs. important role. The traditional preparation method is to graft biocompatible materials on the surface of the biofilm carrier by surface modification or increasing the specific surface area, so as to increase the...

Examples

Embodiment 1

[0030] refer to figure 1 as shown, figure 1 Indicates the carrier structure of honeycomb straight inclined tube, in which 1 means the filler shaped like a honeycomb straight inclined tube, and 2 means the coating coated on the surface of the carrier.

[0031] The preparation method of the carrier is as follows:

[0032] 1) Press the PP filler into a solid filler of honeycomb straight inclined tube type by using a mold;

[0033] 2) dissolving polylactic acid in dichloromethane, dissolving, adding silicate at the same time, preparing polylactic acid-silicate solution;

[0034] 3) immersing the solid filler prepared in step 1) into the solution prepared in step 2) to coat the surface of the filler with polylactic acid and silicate;

[0035] 4) Ventilate and dry the solid filler coated in step 3), and completely volatilize the dichloromethane in the solution to obtain a composite biofilm carrier of polylactic acid-silicate coating coated PP filler

[0036] figure 2 Represent...

Embodiment 2

[0040] The packing of the support structure is corrugated:

[0041] The preparation method of the carrier is as follows:

[0042] 1) Mix ceramic particles and calcium alginate and use a mold to press into a solid filler of honeycomb straight inclined tube type;

[0043] 2) dissolving starch and calcium sulfate in dichloromethane to form a solution;

[0044] 3) immersing the solid filler prepared in step 1) into the solution prepared in step 2) to coat the surface of the filler with a coating;

[0045] 4) ventilating and drying the solid filler coated in step 3) to obtain a composite biofilm carrier.

[0046] The carrier prepared in Example 2 was subjected to a biofilm growth experiment, and it can also achieve biofilm fixation and film-hanging maturation, and has good decontamination ability.

Embodiment 3

[0048] The filler of the carrier structure is of fibrous type:

[0049] The preparation method of the carrier is as follows:

[0050] 1) Mix glass pellets and polyethylene terephthalate and use a mold to press into a honeycomb straight inclined tube-shaped solid filler;

[0051] 2) dissolving aliphatic polyester and diatomaceous earth in dichloromethane to form a solution;

[0052] 3) immersing the solid filler prepared in step 1) into the solution prepared in step 2) to coat the surface of the filler with a coating;

[0053] 4) ventilating and drying the solid filler coated in step 3) to obtain a composite biofilm carrier.

[0054] The carrier prepared in Example 3 was subjected to a biofilm growth experiment, and it can also achieve biofilm fixation and film-hanging maturation, and has good decontamination ability.

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