Porous polymer filling material for biotrickling filter

A technology of porous polymer and biological trickling filter bed, which is applied in the field of environmental protection and polymer materials, can solve the problems of low compressive strength and poor hydrophilic affinity, etc., and achieve the purpose of improving compressive strength, increasing water absorption, and improving sewage flux effect

Inactive Publication Date: 2017-05-10
HEFEI INNOVATION LIGHTWEIGHT MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of porous polymer filler for biological trickling filter bed with large specific surface area, lig

Method used

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  • Porous polymer filling material for biotrickling filter

Examples

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Example Embodiment

[0029] Example 1

[0030] Add 95 parts of polypropylene, 3 parts of methyl styrene, 2 parts of talc powder, 1 part of polyvinyl alcohol, and 1 part of iron powder into the mixer and mix well, then add a single screw extruder with a diameter of 65mm and an aspect ratio of 50. In the feeding port of, inject 19 parts of liquid carbon dioxide into the compression section of the extruder, fully mixed and extruded through a circular die (1mm in diameter), then stretched, cooled, and pelletized.

[0031] The porous polymer filler has a density of 50 g / L, a particle size of 3 mm, and an open porosity of 91%.

Example Embodiment

[0032] Example 2

[0033] After mixing 85 parts of polystyrene, 10 parts of polymethacrylate, 4 parts of a mixture of sodium bicarbonate and citric acid, 3 parts of ceramic powder, and 2 parts of magnetic powder through a mixer, add the 65mm diameter and 50 aspect ratio. In the feed port of the single-screw extruder, 8.5 parts of nitrogen are injected into the compression section of the extruder, fully mixed and extruded through a circular die (diameter 1mm), then stretched, cooled, and pelletized.

[0034] The porous polymer filler has a density of 40 g / L, a particle size of 3 mm, and an open porosity of 93%.

Example Embodiment

[0035] Example 3

[0036] After mixing 80 parts of polyethylene, 18 parts of EPDM rubber, 0.5 parts of kaolin, 5 parts of activated carbon, and 1 part of magnetic powder through a mixer, they are added to a tandem single-screw extruder with a diameter of 65 / 90mm and a length-to-diameter ratio of 35. In the feeding port of the extruder, 4 parts of butane is injected into the compression section of the extruder, fully mixed and extruded through a circular die (diameter 2.5mm), and then stretched, cooled, and pelletized.

[0037] The porous polymer filler has a density of 20 g / L, a particle size of 8 mm, and an open porosity of 95%.

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Abstract

The invention provides a porous polymer filling material for a biotrickling filter. The porous polymer filling material is prepared from the following ingredients in parts by weight: polymer resin, polymer modifiers, nucleating agents, hydrophilic modifiers, compatibility modifiers and pore forming agents. The filling material has the characteristics of large specific area, light specific weight, hydrophilia, compatibility and the like; the removal rate of COD and NH3-N in sewage are improved; the filling material belongs to an ideal biotrickling filter filling material.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and polymer materials, in particular to a biodegradable ammonia nitrogen (NH 3 -N) and chemical oxygen demand (COD) of porous polymer fillers. Background technique [0002] The biological trickling filter bed originated more than 100 years ago. It has become the preferred technology for the municipal sewage treatment industry due to its broad-spectrum applicability, high efficiency, low consumption, and wide-scale promotion. Since the filler is the place where microorganisms live and work, it is not only a support carrier for microbial growth, but also a gas-liquid-solid mass transfer medium, and its performance directly affects the effect of degrading pollutants. Therefore, filler is one of the core technologies of biological trickling filter beds. [0003] Traditional bio-trickling filter bed fillers include compost, bark, wood chips, charcoal and other fillers. With the advan...

Claims

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Application Information

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IPC IPC(8): C02F3/00C02F3/34
CPCC02F3/00C02F3/34C02F2003/001C02F2209/08C02F2209/14C02F2305/06
Inventor 戴苍松陶慷高振兴郭洪武李玉玲余莉花
Owner HEFEI INNOVATION LIGHTWEIGHT MATERIALS
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