Magnetite-zeolite magnetic biological carrier material, its preparation method and its application method

A biological carrier and magnetite technology, applied in sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problem of biofilm shedding on the surface of filter materials, urban landscape water corruption, and poor effluent quality, etc. problems, to achieve the effect of increasing nitrification reaction rate, increasing substrate concentration, and good denitrification effect

Inactive Publication Date: 2011-11-30
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current sewage reuse rate is less than 5%. Economy and safety are the prerequisites for realizing sewage reuse. According to the current treatment technology level and treatment method, although the nitrogen and phosphorus content of the effluent of the secondary treatment of the sewage treatment plant has reached the discharge standard, However, direct recycling will also cause problems such as urban landscape water corrosion and industrial equipment piping system corrosion.
However, due to the thickening and adhesion of the biofilm in the biofilter, the filter material of the biofilter is often agglomerated, and the agglomerated filter material cannot be well destroyed during backwashing, resulting in more and more serious short circuits in the water flow of the biofilter.
In addition, due to strong backwashing, the biofilm on the surface of some filter materials is excessively shed, resulting in a serious deterioration of the water quality of the effluent treated by the biofilter for a period of time after backwashing, and it takes several hours to return to normal

Method used

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  • Magnetite-zeolite magnetic biological carrier material, its preparation method and its application method
  • Magnetite-zeolite magnetic biological carrier material, its preparation method and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The raw material of magnetite-zeolite magnetic biological carrier material constitutes by mass percent in the present embodiment:

[0023] Zeolite 45%, magnetite 15%, cement 40%.

[0024] In this embodiment, the magnetite-zeolite magnetic biological carrier material is prepared according to the following steps:

[0025] Pulverize zeolite and magnetite to obtain 20-140 mesh powder, add cement to the obtained powder, mix uniformly, add water to obtain a mixed slurry, the amount of water added is 30-60% of the mass of the mixed slurry, and the The mixed slurry is sprinkled into the pelletizing pan and granulated to obtain pellets with a particle diameter of 3-5mm ( figure 1 ), standing at room temperature for no less than 10 days, continuously spraying water on the surface of the obtained granules during the standing process to keep the surface of the granules moist to obtain the finished product.

[0026] The magnetite-zeolite magnetic biological carrier material prepar...

Embodiment 2

[0028] The raw material of magnetite-zeolite magnetic biological carrier material constitutes by mass percent in the present embodiment:

[0029] Zeolite 82%, magnetite 8%, cement 10%.

[0030] The preparation method of the magnetite-zeolite magnetic biological carrier material in this embodiment is the same as that in Embodiment 1.

[0031] The magnetite-zeolite magnetic biological carrier material prepared in this embodiment has strong magnetism, its magnetic susceptibility is greater than 4000SI, the particle strength is greater than 100N, and contains pores of 10 microns to 100 microns.

Embodiment 3

[0033] The raw material of magnetite-zeolite magnetic biological carrier material constitutes by mass percent in the present embodiment:

[0034] Zeolite 60%, magnetite 10%, cement 30%.

[0035] The preparation method of the magnetite-zeolite magnetic biological carrier material in this embodiment is the same as that in Embodiment 1.

[0036] The magnetite-zeolite magnetic biological carrier material prepared in this embodiment has strong magnetism, its magnetic susceptibility is greater than 4000SI, the particle strength is greater than 100N, and contains pores of 10 microns to 100 microns.

[0037] The magnetic biocarrier material prepared in Examples 1-3 was packed into a test column with a diameter of 30 mm and a height of 2000 mm, and the effective height of the filler was 1200 mm. Prepare simulated nitrogen-containing slightly polluted water with an ammonia nitrogen concentration of 20mg / L, a COD concentration of 50mg / L, and a phosphorus concentration of 0.5mg / L. The d...

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Abstract

The invention discloses a magnetite-zeolite magnetic biological carrier material, as well as a preparation method and an application method thereof. The magnetite-zeolite magnetic biological carrier material adopts raw materials such as zeolite, magnetite and cement. The preparation method comprises the following steps of: smashing and sieving the zeolite and magnetic iron ores, then adding the cement, mixing to be uniform and then adding water, pelleting, moulding and standing for more than 10 days at normal temperature, and continuously spraying water onto the surfaces of the obtained particles during standing so as to keep the surfaces of the particles to be wet, thus the finished product is obtained. The magnetic biological carrier disclosed by the invention can be applied to deep treatment of domestic sewage secondary treatment water, deep treatment and resource utilization of industrial waste water, deep treatment of micro-pollution drinking water and urban landscape water treatment.

Description

1. Technical field [0001] The invention relates to a biological aerated filter filler, a preparation method and application thereof, specifically a magnetite-zeolite magnetic biological carrier material, a preparation method and an application method thereof. 2. Background technology [0002] In my country, with the improvement of urban sewage treatment rate and the increasingly serious urban water shortage, the demand for sewage resource utilization is becoming more and more urgent. The current sewage reuse rate is less than 5%. Economy and safety are the prerequisites for realizing sewage reuse. According to the current treatment technology level and treatment method, although the nitrogen and phosphorus content of the effluent of the secondary treatment of the sewage treatment plant has reached the discharge standard, However, direct recycling will also cause problems such as urban landscape water corrosion and industrial equipment piping system corrosion. Therefore, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/10
CPCY02W10/10
Inventor 朱承驻陈天虎谢晶晶谢巧勤陈冬鲍滔
Owner HEFEI UNIV OF TECH
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