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Coke particle biomembrane carrier and preparation method thereof

A technology of biofilm carrier and coke particles, which is applied in the direction of sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of high material cost, complicated processing technology, low porosity, etc. Good compatibility, simple preparation method and low preparation cost

Active Publication Date: 2015-04-08
武汉钢铁有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, inorganic and organic microbial carriers / fillers are widely used in the domestic market. These biological carriers have many disadvantages, such as high material cost, complicated processing technology, and some environmental problems such as secondary pollution.
For example, the inorganic ceramic materials used generally have the disadvantages of high density, low porosity, small specific surface area, and large fluidization power consumption in the reactor; most of the polymer organic carriers come from petrochemical derivatives, such as polypropylene, Polyethylene, etc. have poor hydrophilicity, poor microbial film formation and microbial biomass, and some materials are photolyzed in the environment, and even have certain toxicity to environmental organisms

Method used

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  • Coke particle biomembrane carrier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Weigh 50g of coke particles with a particle size of 200 mesh, and put the coke particles into a closed carbonization chamber in the CO 2 Under gas protection, heat up to 650°C for 3h, take out the carbonized coke particles and cool to room temperature.

[0035] 2) Add the carbonized coke particles in step 1) to a nitric acid solution with a mass concentration of 10% at 80°C for a treatment time of 2h;

[0036] 3) The coke particles treated in step 2) are immersed in a sodium hydroxide solution with a mass concentration of 31.7% at room temperature for 2 hours, washed until neutral, and then washed with tap water for 1 to 2 times, and dried at 100°C for 2 hours Make a coke particle matrix;

[0037] 4) Dissolve 3g of polyvinyl alcohol (polymerization degree greater than 1750) in 97mL of boiling water at 100℃ under reflux and stir for 8h to obtain a 3% polyvinyl alcohol solution;

[0038] 5) Measure 3.2 mL of glyoxal solution with a mass concentration of 2.5%;

[0039] 6) Cross-...

Embodiment 2

[0045] 1) Weigh 10g of coke particles with a particle size of 300 mesh, and put the coke particles into a closed carbonization chamber in the CO 2 Under gas protection, heat up to 750°C for 1 hour, take out the carbonized coke particles and cool to room temperature.

[0046] 2) Put in the nitric acid solution with a mass concentration of 50% at 100°C in step 1), and the treatment time is 2h;

[0047] 3) The coke particles treated in step 2) are washed with sodium hydroxide solution with a mass concentration of 20% at room temperature for 0.5h, and then washed with tap water for 1 to 2 times, and dried for 1h to make a coke particle matrix ;

[0048] 4) Dissolve 6g of polyvinyl alcohol (polymerization degree greater than 1750) in 94mL of 100℃ boiling water and stir for 8 hours to obtain a 6% polyvinyl alcohol solution;

[0049] 5) Measure 2 mL of glyoxal solution with a mass concentration of 0.5%;

[0050] 6) Cross-link the polyvinyl alcohol solution and the cross-linking agent solution...

Embodiment 3

[0056] 1) Weigh 20g of coke particles with a particle size of 15 mesh, and put the coke particles into a closed carbonization chamber in the CO 2 Under gas protection, heat up to 700°C for 2h, take out the carbonized coke particles and cool to room temperature.

[0057] 2) Add the carbonized coke particles in step 1) to a nitric acid solution with a mass concentration of 20% at 100°C for a treatment time of 1 to 3 hours;

[0058] 3) The coke particles treated in step 2) are immersed in a calcium hydroxide solution with a mass concentration of 6.4% at room temperature for 2 hours, washed to neutrality, washed with tap water for 1 to 2 times, and dried for 1 hour to make a coke particle matrix ;

[0059] 4) Dissolve 8g of polyvinyl alcohol (polymerization degree greater than 1750) in 92mL of 100℃ boiling water and stir at reflux for 8 hours to obtain an 8% polyvinyl alcohol solution;

[0060] 5) Measure 2 mL of glutaraldehyde solution with a mass concentration of 1.5%

[0061] 6) Cross-l...

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Abstract

The invention discloses a coke particle biomembrane carrier and a preparation method thereof. According to the carrier, a weight part ratio of the coke particles, polyvinyl alcohol and a cross-linking agent is 100-500 : 30-100 : 0.1-0.8. The method comprises weighing the coke particles, adding the coke particles into an enclosed carbonization chamber, heating to 650-750 DEG C under protection of CO2 gas for 1-3 hours, taking out the coke particles, cooling to a room temperature, adding a strong acid solution and a strong alkaline solution for processing, crosslink a polyvinyl alcohol solution with a crosslinking agent solution for 10-24 hours, cooling, and granulating or cutting for molding, thereby obtaining the coke particle biomembrane carrier. According to the invention, because the modified coke particles have relatively large specific surface area and excellent adsorption performance, adsorption capability and biofilm culturing amount of the carrier for microorganisms and contaminants can be improved, thereby being beneficial for adapting treatment of high-concentration organic wastewater, and being relatively high in resistance to shock loading.

Description

Technical field [0001] The invention belongs to the field of wastewater treatment, and specifically relates to a coke particle biofilm carrier and a preparation method thereof. technical background [0002] Since the successful operation of the biofilter, the biofilm method has been rapidly developed and applied in recent years due to its strong degradation ability, short contact time, small footprint and low investment cost. The activated sludge method is still the most commonly used method for water treatment in China due to its mature wastewater treatment technology and low operation and maintenance costs. However, the activated sludge method has a large area, more surplus sludge, poor denitrification effect, prone to sludge expansion and sludge loss, and so on. People use biofilm method to improve the performance of biochemical treatment. The biofilm method as a microbial carrier material determines the wastewater treatment effect and mass transfer efficiency in the reactor....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/00C02F3/10
CPCY02W10/10
Inventor 张垒刘璞王丽娜付本全刘尚超张楠薛改凤段爱民刘霞王凯军
Owner 武汉钢铁有限公司
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