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Micropore biofilm carrier filler based on mesh structure

A biofilm carrier and mesh technology, used in biological treatment devices, sustainable biological treatment, biological water/sewage treatment, etc. Aeration conditions and other issues to achieve the effect of resisting impact damage

Active Publication Date: 2016-08-31
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The result of practical application is that the film-forming effect of the above-mentioned fillers in the anaerobic tank is not bad, but in the aerobic tank under strong hydraulic shear and strong aeration intensity, the film-forming effect of these fillers is extremely poor. According to the survey, some products have been added to the reaction tank for 3 years, and there is no obvious biofilm on the surface of the filler.
The reason for this result is that the currently designed filler form is not suitable for the hydraulic and aeration conditions of the aerobic tank, so it is necessary to create a filler that is more suitable for the conditions of the aerobic reaction tank in the overall structure

Method used

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  • Micropore biofilm carrier filler based on mesh structure

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Embodiment 1

[0023] Microporous biofilm carrier filler based on mesh structure see figure 1 ,preparation

[0024] (1) Mix and granulate with 75% mass fraction of macromolecular polymers such as polyethylene or polypropylene, 10% mass fraction of polyvinyl alcohol and 15% limestone powder of 150-200 meshes as the main material;

[0025] (2) The hot-melt extrusion mesh head is rotated into a cylinder to make a mesh cylinder: the mesh die head of the hot-melt extruder is rotated and extruded, and the mesh is stretched to make the mesh into a uniform diamond shape and foam. After sufficient, it is shaped by water cooling; the high fins are obtained by widening and deepening the corresponding holes according to the model.

[0026] (3) After setting, the mesh cylinder is soaked with 30% sulfuric acid or hydrochloric acid solution, and the soaking time is 1.5h, so that about 80% of the limestone powder is dissolved by acid to form fine voids;

[0027] (4) washing with water and adjusting the pH...

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Abstract

The invention discloses a micropore biofilm carrier filler based on a mesh structure and belongs to the field of sewage and wastewater treatment. A polyethylene or polypropylene high-molecular polymer serves as the main carrier material, auxiliary materials polyvinyl alcohol and limestone powder are added, the adding amount of polyvinyl alcohol is 10% of the total weight of the main material and the auxiliary materials, limestone powder is 150-200-mesh powder, and the adding amount of limestone powder is 15-20% of the total weight of the main material and the auxiliary materials. The whole structure is a web cylinder, an elevated fin is arranged every other several netting wires outside the web cylinder in the direction of the netting wires, the elevated fins are integrated with the web cylinder, and the elevated fin and the web cylinder are made of the same material. A biofilm carrier is provided with two-grade gaps, the first-grade microbubble gaps are formed through foaming, and the second-grade fine gaps are formed through acid dissolution of small limestone granules. The filler has high bacteria adhesiveness property, high biological film load performance and excellent biological film stability after biofilm formation, and therefore excellent biochemical performance is realized.

Description

Technical field: [0001] The invention belongs to the field of sewage and waste water treatment, and particularly relates to a biofilm carrier filler based on a mesh structure. Background technique: [0002] At present, the biological fillers used in the field of sewage and wastewater treatment are mainly divided into two categories, one is soft fillers, including soft combination and fixed type, and the other is rigid or semi-soft fillers. The present invention is mainly aimed at rigid fillers. or the problem of semi-soft fillers. At present, the main product categories of these fillers include: Pall rings, polyhedral hollow spheres, Haier rings, stepped rings, Taylor rosettes, conjugated rings, Raschig rings, etc. The design of these fillers mainly pursues the specific surface area of ​​the material and the renewal of the biofilm, as well as the suspended flow state of the filler under the hydraulic shock in the reaction tank. It is believed that bacteria will form a good ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/10
CPCC02F3/109C02F2203/006Y02W10/10
Inventor 杨宏李佳胡银龙
Owner BEIJING UNIV OF TECH
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