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Bioactive filtering material for water treatment and baking technology thereof

A biological activity, water treatment technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., can solve the problem of limited application of aerated biological filter, intolerant of water scour, and large flow resistance and other problems, to achieve the effect of good film hanging performance, good water flow and large porosity

Inactive Publication Date: 2005-09-28
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also studies on the application of sheet ceramics to treat slightly polluted source water in my country. Although sheet ceramics have good film-hanging properties, they have large water flow resistance, are easy to block, have poor strength, are easy to break, and are not resistant to water erosion.
It is precisely because these traditional contact fillers have certain defects that limit the application of biological aerated filters in my country.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] According to the requirements of biological aerated filtration on the physical and chemical properties of ceramsite and the analysis results of clay, clay is used as the main raw material, 0.15‰ lignin and 0.15‰ sulfonate are added as plasticizers, and it is combined with 2‰ polyvinyl alcohol. The chemical composition of the raw materials is adjusted to have higher expansibility, while ensuring high wear resistance, strength and chemical stability of ceramsite products. The firing temperature of ceramsite needs to be strictly controlled during the roasting process. In the drying stage, the temperature is generally controlled at 60°C, and the drying time is preferably two hours; then the temperature is gradually raised to 600°C. The heating process should not be too fast, and the drying time is preferably 1.5 hours. should. In the preheating stage, the time can be shorter, generally 1 hour; then gradually increase the temperature to 1250 ° C, and after 1 hour of roasting...

Embodiment 2

[0018] Embodiment 2: As described in Embodiment 1, the difference is

[0019] Clay is used as the main raw material, 0.3‰ lignin and 0.3‰ sulfonate are added as plasticizers, and it is combined with 4‰ polyvinyl alcohol for roasting.

Embodiment 3

[0020] Embodiment 3: As described in Embodiment 1, the difference is

[0021] Clay is used as the main raw material, 0.1‰ lignin and 0.15‰ sulfonate are added as plasticizers, combined with 2.5‰ polyvinyl alcohol, and roasted.

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PUM

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Abstract

A biologically active filtering material for water treatment and its roasting process by using clay as the principal raw material for the biologically active filtering material, charging lignin sulfonate plasticizing agent and polyvinyl alcohol foaming agent, wherein the biological activity is achieved through roasting process and biological modification. The advantages of the invention are strong biological adhesion, high performance of film suspension, good current fluidized form, easy backwash and strong dirt-blocking capability.

Description

(1) Technical field [0001] The invention relates to a biologically active filter material for water treatment and a baking process thereof, which belongs to the technical field of environmental engineering water treatment. (2) Technical background [0002] Biological aerated filter for sewage treatment is a new sewage treatment process emerging in the late 1980s and early 1990s, and has become popular in Europe, America and Japan. The filter material is mostly made of fiberglass or plastic honeycomb filler, three-dimensional corrugated filter material, soft fiber filter material, semi-soft filter material, and irregular granular filter material, sand, gravel, slag, coke, anthracite, etc. The surface of FRP or plastic packing is smooth, the adhesion of biofilm is poor, and it is easy to age, and in actual use, it is easy to cause different degrees of packing blockage; the water flow in soft packing is not ideal, and it is easy to be bonded together by biofilm. The phenomenon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/20C02F3/10C04B38/02
CPCY02W10/10
Inventor 胡文容段明秀
Owner SHANDONG UNIV
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