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Method for preparing micro magnetic carrier, micro magnetic carrier and active sludge immobilization method

A technology of activated sludge and carrier, which is applied in the direction of inorganic material magnetism, chemical instruments and methods, water/sludge/sewage treatment, etc. It can solve the problems of weak adsorption performance, inability to fix and catalyze, loss of efficacy, etc., and achieve transformation and enhance, improve processing efficiency and effect, and efficiently remove the effect

Inactive Publication Date: 2012-06-27
INST OF HYGIENE & ENVIRONMENTAL MEDICINE PLA ACAD OF MILITARY MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the previous process, only a single magnetic powder was added to the activated sludge, which has weak adsorption performance and cannot effectively fix and catalyze microbial activity; especially under the long-term magnetic field, these magnetic powders will produce memory magnetism, It is easy to agglomerate in activated sludge and lose its original effect

Method used

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  • Method for preparing micro magnetic carrier, micro magnetic carrier and active sludge immobilization method
  • Method for preparing micro magnetic carrier, micro magnetic carrier and active sludge immobilization method
  • Method for preparing micro magnetic carrier, micro magnetic carrier and active sludge immobilization method

Examples

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Embodiment 1

[0030] Provide a kind of preparation method of micromagnetic carrier in this example, it is characterized in that comprising the following steps:

[0031] (1) In the container of the polyvinyl alcohol solution of 10% in the splendid attire 500mL mass concentration, the particle diameter is the magnetic Fe of 90-110nm 3 o 4 The particles are added to the polyvinyl alcohol solution according to the mass volume ratio of 20g / L, that is, 10g, and are evenly distributed by ultrasonic oscillation. The ultrasonic power is 200W and the time is 30min;

[0032] (2) At a solution temperature of 85° C., stir for 30 minutes with a stirrer at a speed of 1000 r / min;

[0033] (3) In the solution of step (2), add successively the glutaraldehyde solution that the mass concentration of 1% namely 5mL is 25% by volume ratio, the analytical pure concentrated hydrochloric acid that volume ratio is 1.5% namely 7.5mL, volume ratio is 0.5 %, that is, 2.5mL of sodium alginate solution with a mass conce...

Embodiment 2

[0036]The preparation method of the micromagnetic carrier in this example, its preparation step just changes the step (1) in embodiment 1, particle diameter is the magnetic Fe of 90-110nm 3 o 4 The microparticles are added into the polyvinyl alcohol solution with a mass concentration of 15% according to the mass-volume ratio of 30g / L, that is, 15g; in step (2), at a solution temperature of 90° C. Rotating speed, stir 50min; In step (3), add the glutaraldehyde solution that volume ratio is 1.5%, namely 7.5mL mass concentration is 25%, add the sodium alginate that volume ratio is 1.5%, namely 7.5mL mass concentration is 2% solution, reacted for 1h; in step (4), successively use analytical pure acetone, mass concentration to be 70% ethanol and distilled water to clean respectively 18min, 20min, 20min, obtain the magnetic Fe 3 o 4 The particle is a granular micro-magnetic carrier with a particle diameter of 100-150 μm coated with a porous polyvinyl alcohol layer on the surface o...

Embodiment 3

[0039] The preparation method of the micromagnetic carrier in this example, its preparation step just changes embodiment 1 step (1), and particle diameter is the magnetic Fe of 90-110nm 3 o 4 The microparticles are added into the polyvinyl alcohol solution with a mass concentration of 20% according to the mass-volume ratio of 50g / L, that is, 25g; in step (2), at a solution temperature of 95° C. Rotating speed, stir 40min; In step (3), add the glutaraldehyde solution that volume ratio is 2%, namely 10mL mass concentration is 25%, adding volume ratio is 2%, namely 10mL mass concentration is the sodium alginate solution of 2%, Reaction 1.5h; In step (4), successively with analysis pure acetone, mass concentration is the ethanol of 70% and distilled water respectively cleaning 20min, 16min, 16min to obtain with magnetic Fe 3 o 4 The particle is a granular micro-magnetic carrier with a particle diameter of 200-250 μm coated with a porous polyvinyl alcohol layer on the surface of ...

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Abstract

The invention relates to a method for preparing a micro magnetic carrier, the micro magnetic carrier and an active sludge immobilization method. The method for preparing the micro magnetic carrier comprises the following steps of: adding 10 to 50g / L of Fe3O4 particles into a polyvinyl alcohol solution, stirring, and adding a glutaraldehyde solution, concentrated hydrochloric acid and a sodium alginate solution for reacting; and washing with acetone, ethanol or distilled water, drying, and thus obtaining the micro magnetic carrier using the magnetic Fe3O4 particles as a core for wrapping a polyvinyl alcohol layer. A sequencing batch reactor technology is used in the active sludge immobilization method using the micro magnetic carrier as a core, the inoculation medium consists of the micro magnetic carrier and conventional sewage in a mass ratio of 1:1-1:3 and is used for secondary bio-treatment of active sludge, and the concentration of the inoculated active sludge is 2 to 4g / L (mass of the dry sludge / effective volume of a reactor); and the operating mode comprises water feeding, anaerobic stirring, aerobic aeration, settlement, drainage and standing. The invention has the advantages of quickening the biochemical reaction rate of dirt degradation and improving the treatment efficiency and the treatment effect of the sewage.

Description

technical field [0001] The invention relates to the technical field of sewage biological treatment, in particular to a preparation method of a micromagnetic carrier, a micromagnetic carrier prepared by the preparation method and an activated sludge immobilization method with the micromagnetic carrier as the core. Background technique [0002] In the sewage biological treatment process, microorganisms are the main body to remove pollutants. Its pollutant removal process is a complex system including physical, chemical, and life processes, and is directly related to the series of catalytic reactions between the multi-enzyme system of microorganisms and organic matter. Transfer characteristics can largely affect the efficiency of wastewater treatment. [0003] The improvement of sewage treatment effect brought about by the progress of every sewage biological treatment process can be attributed to the adjustment of process parameters in time or space to provide more microbial c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/12C08L29/04C08L5/04C08K3/22C08K5/07C08J3/24H01F1/36C02F3/00C02F3/30
Inventor 张斌王景峰李君文陈哲薛斌
Owner INST OF HYGIENE & ENVIRONMENTAL MEDICINE PLA ACAD OF MILITARY MEDICAL
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