Low-density ceramsite filter material for biological aerated filter and preparation method thereof

A technology of biological aerated filter and ceramsite filter material, which is applied in the field of water treatment, can solve the problems of unfavorable promotion and development of biological aerated filter technology, incomplete backwashing, and high apparent density, and shorten the backwashing time , reduce energy consumption, and avoid the effect of filter material hardening

Inactive Publication Date: 2011-11-30
谭海燕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ceramsite filter materials currently on the market generally have a higher apparent density (generally 1.8g/cm 3 ), resulting in high energy consumption during BAF backwashing and incomple

Method used

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  • Low-density ceramsite filter material for biological aerated filter and preparation method thereof
  • Low-density ceramsite filter material for biological aerated filter and preparation method thereof
  • Low-density ceramsite filter material for biological aerated filter and preparation method thereof

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Example Embodiment

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1 to Figure 2 As shown, a low-density ceramsite filter material for aerated biological filter is mainly made of Guizhou soil, clay, china clay, Yichun soil, pore former, adhesive and charcoal material.

[0027] Calculated by weight percentage, they are: Guizhou soil 20-30%, clay 10-15%, pottery clay 5-12%, Yichun soil 1-5%, pore-forming agent 10-20%, adhesive 6-15%, Charcoal material 3 to 15%. The Guizhou soil can be either Guizhou kaolin or Guizhou bauxite, and the Yichun soil can be Yichun kaolin or Yichun bauxite.

[0028] The low-density ceramsite filter material is in the shape of spherical particles with rough surface, and the particle size is 3-6 mm, and the low-density ceramsite filter material has a porous structure, and its porosity is greater than 60%.

[0029] The particle size of the low-density ceramsite filte...

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Abstract

The invention relates to a low-density ceramsite filter material for a biological aerated filter, and a preparation method thereof. The invention provides the low-density ceramsite filter material for the biological aerated filter, and the low-density ceramsite filter material is mainly prepared from Guizhou soil, clay, pottery clay, Yichun soil, pore former, adhesive and a charcoal material. Theinvention also provides a preparation method for the low-density ceramsite filter material. The invention has the advantages that: the Guizhou soil, clay, pottery clay, Yichun soil, pore former, adhesive and charcoal powder are used as raw materials, so that the excellent physical properties such as a large specific surface area, and high surface roughness and mechanical strength and the like of the low-density conventional heavy ceramsite filter material are kept, the density of the low-density ceramsite filter material is reduced well so as to reduce energy consumption during backwashing, contribute to complete backwashing, and avoid the problem that the filter material is hardened during long-term running and the like, the production cost and the waste water treatment cost are greatly reduced, and the popularization and application of the biological aerated filter process can be facilitated.

Description

technical field [0001] The invention relates to water treatment, in particular to a low-density ceramsite filter material used in biological aerated filter tanks in water treatment and a preparation method thereof. Background technique [0002] Biological Aerated Filter (BAF) is an aerobic biofilm wastewater treatment process that combines biological contact oxidation with water filtration. It belongs to biological filtration technology. It mainly uses the interception and The dual role of biodegradation of the biofilm on the filter media removes pollutants. [0003] At present, there are two commonly used BAF processes, Biostry and Biofor, and the Biofor process is widely used because of the use of low-cost heavy filter materials. At present, the filter materials used in the Biofor process include ceramsite, volcanic rock, zeolite, etc., and ceramsite is widely used due to its advantages such as large specific surface area, rough surface, high mechanical strength, good bio...

Claims

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Application Information

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IPC IPC(8): B01D39/06C02F3/10
CPCY02W10/10
Inventor 谭海燕彭建良董文艺李继王珍珠
Owner 谭海燕
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