Magnetic coagulating sedimentation sewage treatment system and method based on low-density magnetic particles

A sewage treatment system and magnetic particle technology, applied in the direction of flocculation/sedimentation water/sewage treatment, magnetic field/electric field water/sewage treatment, etc. The effect of reducing the sinking rate and efficient flocculation and sedimentation

Active Publication Date: 2021-11-23
CHINA CONSTR THIRD BUREAU GREEN IND INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle size of the magnetic powder used in this method is still relatively large, and the problem of wear and tear on sewage treatment equipment has not been resolved.

Method used

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  • Magnetic coagulating sedimentation sewage treatment system and method based on low-density magnetic particles
  • Magnetic coagulating sedimentation sewage treatment system and method based on low-density magnetic particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0037] A magnetic concrete precipitated sewage treatment system and method based on low-density magnetic particles, by adding low density magnetic particles, it can adsorb the macromolecular contaminants in water and the growth of the floc, thereby increasing the precipitation rate of the precipitation tank, and decreases Wear of the device. details as follows:

[0038] 1) Inlet region

[0039] Efficient precipitated pools per 2 groups. Each highly active precipitated pool can be closed by isolation shutters.

[0040] Water quality requirements: SS: 70 ~ 500mg / L; COD: 100 ~ 400mg / L; TP ≤ 4mg / L.

[0041] 2) Concrete

[0042] Each highly active precipitated tank has 2 concurrent tanks. The concrete unit is a rectangular structure with a rapid mixer for rapid mixing of the water and the coagulant. After the concrete, the sewage enters an efficient precipitation tank via the underflow channel. Concisor recommends using polymerized aluminum chloride, investment volume (with Al 2 O ...

Embodiment 6

[0069] A magnetic concrete precipitated sewage treatment system and method based on low-density magnetic particles, and different from Example 2, the added magnetic nanoparticles are magnetic microspheres of the hollow structure, and the density is about 3.0 g / cm. 3 The iron source is enriched in the alkaline environment in the surface of the porous polystyrene microspheres and then calcined at high temperature to obtain a multi-shell layer hollow Feo microspheres. Others are substantially the same as in Example 2, and details are not described herein again.

Embodiment 7

[0071] A magnetic concrete precipitated sewage treatment system and method based on low-density magnetic particles, and each other is different from Example 2, and the added magnetic nanoparticles are the tetra iron oxide of the porous structure, the density is about 3.1 g / cm 3 , Mixed with a three-iron dioxide suspension with a polyphenylene microspheres with cellulose acetate in the surface, and then remove celluloseate cellulose by acetone to obtain a porous structure of four oxide and polystyrene composite micro. ball. Others are substantially the same as in Example 2, and details are not described herein again.

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Abstract

The invention provides a magnetic coagulating sedimentation sewage treatment system and method based on low-density magnetic particles. The sewage treatment system comprises a magnetizing flocculation zone, a settling zone and a magnetic separation zone, low-density magnetic particles with the particle size of 100 nm-20 [mu]m are added into the magnetizing flocculation zone, on one hand, macromolecular pollutants in water are adsorbed through the large specific surface area of the low-density magnetic particles, on the other hand, flocculation particles are adsorbed through the low-density and low-hardness magnetic particles, the floc growth and precipitation rate is accelerated, the flocculation effect is improved, and the abrasion to equipment is reduced; meanwhile, large-particle-size magnetic powder with the particle size of 50-500 [mu]m is added into the magnetic separation zone, and the separation and recovery efficiency of the low-density magnetic particles is improved through adsorption of the large-particle-size magnetic powder to the low-density magnetic particles. The system and the method are suitable for combined system overflow pollution treatment, first rain treatment and sewage advanced treatment.

Description

Technical field [0001] The present invention relates to the field of sewage treatment, and more particularly to a magnetic concrete precipitation sewage treatment system and method based on low density magnetic particles. Background technique [0002] Currently, the high-efficiency concrete precipitation process commonly used in sewage and rainwater treatment mainly includes an additional high-efficiency sedimentation tank and an additive high-efficiency sedimentation tank process. The high-efficiency precipitation tank is a primary reinforced concrete precipitation treatment process. It is mainly due to the investment in the flocculation area to add heavy high-density insoluble medium particles (such as fine sand, garnet, kaolin, etc.), using media gravity settlement and The adsorption of the vector accelerates the "growth" and precipitation speed of the floc. The main feature of the Advanced Efficient Cold Pool is to further strengthen the flocculation effect and precipitation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/48C02F1/52
CPCC02F1/488C02F1/481C02F1/52
Inventor 郑碧娟赵皇周艳霍培书汤丁丁秦雄陈燕平刘军
Owner CHINA CONSTR THIRD BUREAU GREEN IND INVESTMENT CO LTD
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