Magnetic bio-carrier for treating sewage water and preparation method thereof

A technology of biological carrier and magnetic substance, which is applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc. It can solve the problem of high energy consumption of circulation and return, difficulty in carrier stripping, complicated operation and management, etc. problems, to achieve the effect of short production cycle, easy availability of reagents and materials, and good treatment effect

Inactive Publication Date: 2008-09-03
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of the existing biological carrier such as high energy consumption of circulation and reflux in wastewater treatment, difficulty in removing the film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Select polyethylene resin (5000g) and Fe 3 o 4 After the magnetic particles (800g) are fully mixed by a stirrer, they are added to the plastic extruder. In the barrel of the plastic extruder, the magnetic particles and polyethylene resin particles are fully mixed through melting, extruded and cut to form High molecular polymer microparticles of magnetic particles. Then grind and sieve the polymer particles to obtain a magnetic carrier with a particle size of about 0.16-0.315mm and a density of about 1.11g / cm 3 , to obtain the magnetic biocarrier S-1.

Embodiment 2

[0030] Select polypropylene resin (4000g) and metal iron powder magnetic particles (700g) to mix thoroughly with a stirrer, then add them to the plastic extruder, and melt the magnetic particles and polypropylene resin in the barrel of the plastic extruder The particles are fully mixed, extruded and cut to form high molecular polymer particles containing magnetic particles. Then grind and sieve the polymer particles to obtain a magnetic carrier with a particle size of about 0.076-0.16mm and a density of about 1.04g / cm 3 , to obtain the magnetic biocarrier S-2.

Embodiment 3

[0032] After selecting polystyrene resin (5000g) and magnetite powder magnetic particles (900g) to be fully mixed with a stirrer, they are added to the plastic extruder, and in the barrel of the plastic extruder, the magnetic particles and the polymer are melted. Styrene resin particles are fully mixed, extruded and cut to form high molecular polymer particles containing magnetic particles. Then grind and sieve the polymer particles to obtain a magnetic carrier with a particle size of about 0.043-0.076mm and a density of about 1.20g / cm 3 , to obtain the magnetic biocarrier S-3.

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PUM

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Abstract

The invention belongs to the environment protective field, which relates to a magnetic biological carrier used for processing wastewater. The invention comprises 7 to 21 wt percent magnetic particle and 79 to 93 wt percent high molecular polymer; the magnetic particle comprises ferroferric oxide, metallic iron powder, and magnetite; and the high molecular polymer comprises polyethylene, polypropylene, polystyrene and powder rubber. After being stirred and fully mixed, the high molecular polymer particle and the magnetic particle are delivered into an extruder, and the high molecular polymer particle and the magnetic particle are fully mixed, extruded and sheared through fusing under the effect of the extruder, to form the high molecular polymer particle containing the magnetic particle. Then the high molecular polymer particle is ground and screened, finally a magnetic carrier is immersed into a surface active agent, and therefore the magnetic biological carrier is obtained. When the magnetic biological carrier provided by the invention is used to the water treatment, the treatment effect is good, the preparation method is simple, the required reagents and materials are easy to be found, the magnetic biological carrier can be reused, the principles of the extrusion molding and the mixing in the plastic industry are used for reference, and the magnetic biological carrier has the advantages that the controllability is high, the production cycle is short, and the industrialized production is easy to be realized. In addition, the production cost is reduced while the used product resource is circularly utilized by using the used high molecular polymer.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a magnetic biological carrier used for treating sewage by a suspended biofilm method and a preparation method thereof. Specifically, the magnetic biological carrier prepared by the method is added to sewage treated by an activated sludge method In the aeration tank, thereby increasing the biological concentration in the aeration tank and improving the efficiency of sewage treatment, at the same time, most of the magnetic carrier can be recovered and reused after stripping. Background technique [0002] At present, more than 40% of the existing sewage treatment plants in our country adopt the traditional activated sludge method, which has the disadvantages of large area, long treatment time, and low treatment efficiency per unit area. Therefore, improving the efficiency of sewage treatment and shortening the treatment cycle on the basis of the original has become an urgent pr...

Claims

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Application Information

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IPC IPC(8): C02F3/10C02F3/12
CPCY02W10/10
Inventor 王化军常雁红肖宝清周子龙刘晓磊王珊
Owner UNIV OF SCI & TECH BEIJING
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