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Novel filter material used in process of bio-aeration filter tank

A biological aeration filter and filter material technology, applied in aerobic process treatment, sustainable biological treatment, biological water/sewage treatment, etc. Effect

Inactive Publication Date: 2005-01-26
中国地质科学院成都矿产综合利用研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ceramsite filter material is made by high-temperature roasting, and the polystyrene pellets are made by chemical pelletizing. The filter material manufacturing process is complicated and the cost is high.

Method used

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  • Novel filter material used in process of bio-aeration filter tank
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0011] Example 1 A new type of filter material used in the biological aeration filter process, according to weight percentage, its components are as follows:

[0012] Fly ash 32%

[0013] Expanded perlite 2%

[0014] Binder (using 42.5R type cement) 65%

[0015] Pore ​​former (using calcium carbide powder) 1%

[0016] Production method: Choose expanded perlite with a particle size of 2-3mm as the core material, mix the proportioned fly ash, cement, and calcium carbide powder evenly to make the mixed clothing material, send the expanded perlite core material to the pelletizer, and give the core Spray water on the material, while feeding the mixed cloth into the pelletizing machine for continuous pelletization, sieving the manufactured filter balls, leaving a spherical filter material with a particle size of 4-5mm, and putting it in the pool for aging and standing for 20 hours After that, add water for curing for 2-5 days, then sieving, washing and dehydrating, the surface is air-dr...

example 2

[0020] Example 2 Composition of the novel filter material of the present invention: (weight percentage)

[0021] Fly ash 50%

[0022] Cement 45.5%

[0023] Calcium carbide powder 1.5%

[0024] Expanded perlite 3%

[0025] Select expanded perlite with a particle size of 2-3mm as the core material, and produce filter balls with a particle size of 4-5mm in the same way as in Example 1.

[0026] The performance comparison between the new filter material of the present invention and the ceramsite filter material:

[0027]

[0028] From the test data given in the table, it can be seen that the new filter material of the present invention has a higher internal porosity and a larger specific surface area, and the effect ratio 1 in the biological aeration filter process is better.

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Abstract

The invention discloses a novel filter material used in process of bio-aeration filter tank, which comprises (by weight percentage) coal ash 30-60%, adhesives 30-65%, lightweight porous granulate 1-8%, pore-forming agent 0.5-5%. The composition is prepared by using lightweight porous granulate with a finite grain size e.g. expanded perlite as core material, using coal ash, adhesives and pore-forming agent as cover material through mixing, spraying water onto core material, curing and solidifying.

Description

Technical field [0001] The invention relates to a filter material used in a biological aeration filter process, specifically a biological aeration filter suitable for application in urban domestic sewage, community domestic sewage, and lake and river micro-polluted water treatment systems Process filter material. Background technique [0002] The biological aeration filter process is a biofilm treatment process that uses particulate filter material as a biological carrier. This process has the characteristics of stable operation, impact resistance, short sewage retention time, small footprint, and high treatment efficiency. It is widely used in urban sewage treatment, residential sewage treatment and micro-polluted water treatment in lakes and rivers. The process has now been developed to more than 100 in Europe. Since the Dalian Malanhe Wastewater Treatment Plant first adopted the process in 2000, my country has attracted enough attention and has gradually been promoted in China...

Claims

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Application Information

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IPC IPC(8): C02F3/02C02F3/10
CPCY02W10/10
Inventor 唐德身王昌良魏志文
Owner 中国地质科学院成都矿产综合利用研究所