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Surface-modified MBBR suspended carrier and application

A suspension carrier and surface modification technology, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve problems such as easy dissociation, and achieve improved hydrophilicity and wear resistance Good performance and high porosity

Active Publication Date: 2021-07-02
ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the methods of surface modification of many materials, the method of chemical self-polymerization of dopamine has been widely used to modify the surface of substrates, but this method still has some shortcomings. prone to dissociation

Method used

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  • Surface-modified MBBR suspended carrier and application
  • Surface-modified MBBR suspended carrier and application
  • Surface-modified MBBR suspended carrier and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Add dopamine to the Tris-HCl buffer solution with a pH of 8.5 and a concentration of 10mmol / L, and prepare dopamine with a concentration of 3mg / L, 3.5mg / L, 4mg / L, 4.5mg / L, and 5mg / L respectively solution.

[0034] (2) Change the model to Place the MBBR suspension carrier in the dopamine solution, make the surface of the MBBR suspension carrier fully and uniformly contact the dopamine solution, stir at 120rpm for 30min, stir once every 4h, stirring can make the air dissolve into the solution, the total soaking time is 24h, and repeat with distilled water Wash several times and dry naturally to obtain the dopamine-modified MBBR suspension carrier.

[0035] (3) The dopamine surface-modified MBBR suspension carrier was placed in a phosphate buffer solution with a pH of 3.0, soaked for 30 minutes, and protonated. After taking it out, it was repeatedly washed with distilled water several times, and dried naturally to obtain a protonated dopamine surface-modified MBBR s...

Embodiment 2

[0041] (1) preparation pH is 7.5, 8.5, 9.5 respectively, the Tris-HCl damping fluid that concentration is 10mmol / L, then adds dopamine respectively in the Tris-HCl damping fluid of different pH, gets concentration and is 4mg / L but Dopamine solutions with different pH

[0042] Then add dopamine to the Tris-HCl buffer respectively, and stir at 120 rpm for 20 min to completely dissolve the dopamine in the solution to obtain a concentration of .

[0043] (2) Change the model to Place the MBBR suspension carrier in the dopamine solution, make the surface of the MBBR suspension carrier fully and evenly contact the dopamine solution, stir at 120rpm for 30min, and stir once every 4h. The stirring can make oxygen dissolve into the solution. The total soaking time is 24h, and it is repeated with distilled water. Wash several times and dry naturally to obtain the dopamine-modified MBBR suspension carrier.

[0044] (3) The dopamine surface-modified MBBR suspension carrier was placed in...

Embodiment 3

[0050] (1) Dopamine was added to a Tris-HCl buffer solution with a pH of 8.5 and a concentration of 10 mmol / L to prepare a dopamine solution with a concentration of 4 mg / L.

[0051] (2) Change the model to Place the MBBR suspension carrier in the dopamine solution, make the surface of the MBBR suspension carrier fully and uniformly contact the dopamine solution, stir at 120rpm for 30min, every 2h, 4h, 6h, 8h, stir to dissolve oxygen into the solution, and the total soaking time is 24h , washed several times with distilled water, and dried naturally to obtain the dopamine-modified MBBR suspension carrier.

[0052] (3) The dopamine surface-modified MBBR suspension carrier was placed in a phosphate buffer solution with a pH of 3.0, soaked for 30 minutes, and protonated. After taking it out, it was repeatedly washed with distilled water several times, and dried naturally to obtain a protonated dopamine surface-modified MBBR suspension carrier, that is, a surface-modified MBBR su...

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Abstract

The invention discloses a surface-modified MBBR suspended carrier and application, which belongs to the technical field of sewage treatment. A surface-modified MBBR suspended carrier is prepared by the following steps of (1) soaking an MBBR suspended carrier in a dopamine solution to obtain a dopamine surface-modified MBBR suspended carrier, and (2) soaking the MBBR suspended carrier with the dopamine surface modified in the step (1) in a phosphate buffer solution to obtain the protonated MBBR suspended carrier with the dopamine surface modified. The protonated dopamine surface-modified MBBR suspended carrier prepared by the method is beneficial to quickly forming a biological membrane in aquaculture wastewater, the concentration of nitrifying bacteria is improved, the sewage treatment efficiency is improved, and the cost is reduced.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a surface-modified MBBR suspension carrier and its application. Background technique [0002] With the increase of aquaculture scale, the discharge of aquaculture wastewater is also increasing. When the aquaculture wastewater is discharged into the environment, the environment of the water area will deteriorate, causing red tides, and at the same time, the ecological balance and biodiversity of the environment will be destroyed. The decline in water quality in aquaculture waters has also brought huge losses to my country's fishery economy. [0003] Ammonia nitrogen is the main pollutant in aquaculture wastewater and the most difficult to remove. The main sources of ammonia nitrogen in aquaculture wastewater are residual bait and excrement of aquaculture organisms. The most prominent harm of ammonia nitrogen is to make the water body eutrophic and destroy the ecologi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/10C02F3/34C02F101/16
CPCC02F3/104C02F3/108C02F3/34C02F2101/16C02F2203/004C02F2203/006Y02W10/10
Inventor 王慧荣谭映宇王震任旭锋
Owner ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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