A microporous biofilm carrier filler based on mesh structure
A biofilm carrier and mesh technology, which is applied in biological treatment devices, sustainable biological treatment, biological water/sewage treatment, etc., can solve the problem of poor film hanging effect, invisible biofilm, unsuitable for aerobic pool hydraulics and Aeration conditions and other issues to achieve the effect of resisting impact damage
Active Publication Date: 2018-10-09
BEIJING UNIV OF TECH
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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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Embodiment 1
[0023] Microporous biofilm carrier filler based on mesh structure see figure 1 ,preparation
[0024] (1) Adopting 75% of the mass fraction of macromolecular polymers such as polyethylene or polypropylene, 10% of polyvinyl alcohol mass fraction and 15% of 150-200 mesh limestone powder for mixing and granulation;
[0025] (2) Use the hot-melt extrusion mesh die to rotate into a cylinder to make it into a mesh cylinder: through the mesh die of the hot-melt extruder, rotate and extrude, and stretch to make the mesh into a uniform diamond shape, After fully soaked, the shape is set by water cooling; the high-fin fins are obtained by widening and deepening the corresponding holes according to the model.
[0026] (3) net cylinder after finalizing, utilize 30% sulfuric acid or hydrochloric acid acid solution to soak, soak time 1.5h, make about 80% limestone powder be dissolved by acid and form fine void;
[0027] (4) washing with water and adjusting the pH to be neutral by adding al...
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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 wastewater treatment, in particular 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 combinations and fixed types, and the other is rigid or semi-soft fillers. The present invention is mainly aimed at rigid Or semi-soft filler problems and invented. At present, the main product categories of these packings include: Pall rings, multi-faceted 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 suspension flow state of the filler under the hydraulic impact in the reaction tank. It is believed that bacteria will form a good biofilm...
Claims
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IPC IPC(8): C02F3/10
CPCC02F3/109C02F2203/006Y02W10/10
Inventor 杨宏李佳胡银龙
Owner BEIJING UNIV OF TECH