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Preparation method of modified polyurethane sponge filler for emergency of MBBR process

A polyurethane sponge, polyurethane technology, applied in chemical instruments and methods, sustainable biological treatment, water/sludge/sewage treatment, etc., can solve the problem of surface wetting, poor mass transfer performance, hydrophilicity and Problems such as poor biological affinity, to achieve the effect of enhancing the effect of hanging film, improving hydrophilicity and improving effect

Active Publication Date: 2019-12-13
TIANJIN ENVIRONMENTAL PROTECTION TECHNICAL DEV CENT DESIGNING INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of the sponge filler material itself has certain limitations, such as poor hydrophilicity and bio-affinity, resulting in surface wetting of the biofilm carrier and poor mass transfer performance. Its compactness and microbial activity need to be improved, so its application in sewage treatment is limited to a certain extent.

Method used

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  • Preparation method of modified polyurethane sponge filler for emergency of MBBR process

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preparation example Construction

[0026] See the accompanying drawings for details. The present invention adopts a preparation method of modified polyurethane sponge filler for MBBR process emergency use. The conventional polyurethane block sponge filler is modified with a modifier. After modification, the surface of the sponge filler has a certain amount of hydroxyl groups. , carbonyl and other hydrophilic groups, the specific steps are as follows:

[0027] (1) Soak the block polyurethane sponge filler in the mixed solution of acidic potassium permanganate;

[0028] (2) Take out the sponge filler and soak it in hydrochloric acid solution until the brown layer on the surface is washed away, and then take it out and drain;

[0029] (3) Put the drained sponge filler into phosphate buffered saline solution (PBS) for soaking, take out the solution and let it dry naturally after the solution is neutral;

[0030] (4) Soak the dried sponge filler in the modifier, and take it out and drain;

[0031] (5) the sponge f...

Embodiment 1

[0035] 1) Soak block polyurethane sponge packing (15mm×15mm×15mm) in 60°C acidic potassium permanganate mixed solution for 3h, the concentration of potassium permanganate is 0.2mol / L, the concentration of concentrated sulfuric acid is 2

[0036] mol / L;

[0037] 2) Take out the sponge filler and soak it in 6mol / L hydrochloric acid solution until the brown layer on the surface is washed away, then take it out and drain;

[0038] 3) Soak the drained sponge filler in 0.01mol / L PBS solution, take it out and dry naturally after the solution is neutral;

[0039] 4) Soak the dried sponge filler in 50°C, 5% acrylic acid solution for 6 hours, take it out and drain;

[0040] 5) Heat the 1g / L gelatin protein solution in a water bath to 37°C, add 16g of diatomaceous earth and 15g of powdered activated carbon into it, stir evenly, then put the drained sponge filler into the gelatin protein solution, and keep the temperature at 37°C Stirring under the conditions for 24h;

[0041] 6) Take ...

Embodiment 2

[0044] 1) Soak block polyurethane sponge packing (15mm×15mm×15mm) in 60°C acidic potassium permanganate mixed solution for 2 hours, the concentration of potassium permanganate is 0.3mol / L, and the concentration of concentrated sulfuric acid is 2mol / L;

[0045] 2) Take out the sponge filler and soak it in 5mol / L hydrochloric acid solution until the brown layer on the surface is washed away, then take it out and drain;

[0046] 3) Soak the drained sponge filler in 0.015mol / L PBS solution, take it out and dry it naturally after the solution is neutral;

[0047] 4) Soak the dried sponge filler in 50°C, 5% acrylic acid solution for 5 hours, take it out and drain;

[0048]5) Heat the 1g / L gelatin protein solution to 37°C in a water bath, add 10g diatomaceous earth and 18g powdered activated carbon into it, stir evenly, then put the drained sponge filler into the gelatin protein solution, and keep the temperature at 37°C Stirring under the conditions for 24h;

[0049] 6) Take out t...

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Abstract

The invention relates to a preparation method of modified polyurethane sponge filler for emergency of an MBBR (Moving Bed Biofilm Reactor) process. The preparation method is characterized by comprising the following specific steps: soaking a sponge filler into an acidic potassium permanganate mixed solution; taking out the sponge filler, soaking the taken sponge filler into a hydrochloric acid solution until a brown layer on the surface is washed away, taking out the sponge filler, and performing draining; putting the sponge filler into PBS for soaking, taking out the sponge filler after the solution is neutral, and naturally airing the sponge filler; soaking the air-dried sponge filler into a modifier, taking out the sponge filler, and performing draining; soaking the sponge filler into agelatin protein solution containing diatomite and powdered activated carbon; and taking out the sponge filler, performing washing, and performing natural airing to obtain the modified sponge filler used for sewage treatment. The method has the beneficial effects that through the synergistic mechanism of the adsorption effects of activated carbon and the diatomite attached to the surface of the sponge filler and the oxygenolysis effect of microorganisms, the biofilm culturing speed can be increased, meanwhile, the degradation performance of the sponge filler on pollutants in sewage is effectively improved, and therefore the sewage treatment effect is improved.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and in particular relates to a preparation method of a modified polyurethane sponge filler for emergency use in an MBBR process. Background technique [0002] At present, my country's initial rainwater pollution control project has been launched, and rainwater runoff treatment and reuse engineering construction and design research have been carried out in some cities. Rainwater surface runoff is a surface pollution source, and the pollutants often come from large areas and large areas, with strong impact and complex pollution components. As a typical polluted area, industrial parks have many types of land use, and the initially polluted rainwater contains high organic matter content and some difficult-to-treat organic pollutants. The composition is more complex. In order to achieve better treatment effects, the treatment process needs special consideration. [0003] The MBBR ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/10
CPCC02F3/105C02F3/109Y02W10/10
Inventor 丁晔冯辉苏志龙秦萍萍姚晓然王娜王锐李晓鹏
Owner TIANJIN ENVIRONMENTAL PROTECTION TECHNICAL DEV CENT DESIGNING INST
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