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A biological filler for sewage treatment

A biological filler and sewage treatment technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, anaerobic digestion treatment, etc. The effect of cycle life and improvement of material exchange capacity

Active Publication Date: 2015-09-09
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the surface of the biological filler obtained by injection molding is smooth, but in terms of water treatment, the larger the surface area and the greater the surface roughness, the more conducive to the growth of biological film and film, and the improvement of water treatment efficiency; The surface area of ​​the filler needs to be bonded with radial fibers inside the filler; however, this method also has the problem of complicated process and easy falling off during use

Method used

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  • A biological filler for sewage treatment
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  • A biological filler for sewage treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The honeycomb-like spherical biofiller structure of this embodiment is as follows figure 1 As shown, this kind of honeycomb-shaped spherical biological filler is mapped to the spherical surface with 32-hedron as the basic topology to obtain a three-dimensional hollow honeycomb-like spherical structure composed of 5-sided and 6-sided honeycombs. During mapping, except for the edges of the 32-hedron, the rest of the parts are Hollow structure.

[0050] In this embodiment, the biofiller is prepared by selective laser sintering (SLS), and the raw material used in selective laser sintering (SLS) is PS with a particle size of 500 mesh.

[0051] The shape and performance parameters of the obtained honeycomb-like spherical biofiller in this embodiment are as shown in Table 1:

[0052] Table 1 Example 1 Type Honeycomb Spherical Biofiller Shape and Performance Parameters

[0053] diameter

100mm

thickness

0.5mm

Depth:

25mm (1 / 2 radius)

...

Embodiment 2

[0057] The honeycomb-like spherical biofiller structure of this embodiment is as follows figure 2 As shown, the difference between this embodiment and Example 1 is that the diameter of the honeycomb-like spherical biological filler in this embodiment is 50mm; the shape and performance parameters of the honeycomb-like spherical biological filler obtained in this embodiment are shown in Table 2:

[0058] Table 2 Example 1 Class honeycomb spherical biofiller shape and performance parameters

[0059] diameter

50mm

thickness

0.5mm

Depth:

12.5mm (1 / 2 radius)

[0060] surface area

17218mm^2

volume

3153mm^3

specific surface area

5461

quality

3.5g

Porosity

95.2％

[0061] As shown in Table 2, the depth of the honeycomb is 1 / 2 of the radius of the ball, the thickness of the side wall of the honeycomb is 0.5mm, and the mass is 3.5g; the specific surface area is 5461, and the por...

Embodiment 3

[0064] The honeycomb-like spherical biofiller structure of this embodiment is as follows image 3 As shown, the difference between this embodiment and Embodiment 1 is that the honeycomb-like spherical biological filler in this embodiment has a honeycomb depth of 1 / 3 of the radius of the ball.

[0065] After testing, the quality of the prepared honeycomb-like spherical biological filler in this embodiment is 12g; its surface area is 50530mm 2 , with a volume of 11723mm 3 , the specific surface area is 4310, and the porosity is 97.8%.

[0066] After testing, the surface roughness of the honeycomb-like spherical biofiller prepared in this example is 70um, the tensile strength is 35MPa, the bending strength is 25MPa, and the impact strength (notch strength) is 3.2KJ / m^2.

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Abstract

The invention discloses a biological stuffing for wastewater treatment. The biological stuffing is shaped like a honeycomb-like sphere, is formed by using a selective laser sintering method and has the specific surface area of larger than or equal to 3000, the porosity of larger than or equal to 90%, the surface roughness Ra of larger than or equal to 60mum, the tensile strength of larger than or equal to 30MPa, the bending strength of larger than or equal to 20MPa and the impact strength of larger than or equal to 3KJ / m<2>. The honeycomb-like spherical biological stuffing is of a three-dimensional hollow honeycomb-like spherical structure formed by a pentagonal or / and hexagonal honeycomb through mapping towards a spherical surface by taking a dodecahedron, hexakaidecahedron or triacontadihedron as a basic topology, wherein the honeycomb is of a structure obtained through mapping single face of the dodecahedron, hexakaidecahedron or triacontadihedron; all parts except for the edges of the dodecahedron, hexakaidecahedron or triacontadihedron are of hollow structures during mapping. The biological stuffing disclosed by the invention has extremely high specific surface area and favorable surface roughness under the condition that the mechanical property of wastewater treatment is met, so that the biofilm formation can be favorably realized, and the wastewater treatment efficiency is increased.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and relates to a biological filler for sewage treatment, in particular to a biological filler with high specific surface area and high porosity. Background technique [0002] At present, the specific surface area of ​​sewage treatment biological filler structure is 700 at most abroad, and 500 at home; the shape is similar to columnar or spherical, and it is mainly manufactured by injection molding. [0003] However, the surface of the biological filler obtained by injection molding is smooth, but in terms of water treatment, the larger the surface area and the greater the surface roughness, the more conducive to the growth of biological film and film, and the improvement of water treatment efficiency; The surface area of ​​the filler needs to be bonded with radial fibers inside the filler; however, this method also has the problem of complicated process and easy falling off during use. [0004] T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/10C02F3/28
CPCY02W10/15Y02W10/12Y02W10/10
Inventor 范树迁黎静段宣明陈猷鹏郭劲松
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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