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Biological aerated filter packing and preparation method thereof

A biological aerated filter and aggregate technology, applied in the direction of sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc. Solve problems such as uranium formation, and achieve the effect of low price, low calcination temperature and good water resistance

Active Publication Date: 2012-07-04
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As the core component of the biological aerated filter, the biological filter material affects the treatment effect and operation control of the process, so the selection of suitable filter material is of great significance to the promotion and application of the biological aerated filter process. Biofilter fillers have some common shortcomings, such as small porosity, uranium on the surface, high firing temperature, poor strength, and easy breakage, which limit the application of biological aerated filters in sewage treatment in my country. It is imperative to develop a good filter material

Method used

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  • Biological aerated filter packing and preparation method thereof
  • Biological aerated filter packing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The raw materials of the biological aerated filter filler in this embodiment are constituted by mass percentage as follows:

[0025] Attapulgite clay 78%, straw 12%, goethite 10% (iron content 30%);

[0026] The aggregate is one or a mixture of attapulgite clay, kaolin, montmorillonite and diatomite;

[0027] The iron oxide is an iron oxide substance containing iron in a mass percentage of not less than 30%;

[0028] The pore forming agent is one or more of sawdust, straw and leaves.

[0029] The preparation method of the biological aerated filter filler of the present embodiment is as follows:

[0030] Pass attapulgite clay, straw and goethite respectively through a 200-mesh sieve and mix to obtain a mixture;

[0031] Add water with 30% of the mass of the mixture to the mixture, then granulate and shape, control the particle size to 5-6mm, dry naturally, and calcinate at 800°C for 2 hours in the air to obtain the biological aerated filter filler.

[0032] The biolo...

Embodiment 2

[0037] The raw materials of the biological aerated filter filler in this embodiment are constituted by mass percentage as follows:

[0038] Kaolin 80%, leaves 10%, hematite 10% (iron content 35%).

[0039] The preparation method of the biological aerated filter filler of the present embodiment is as follows:

[0040] Pass kaolin, leaves and hematite respectively through a 200-mesh sieve and mix to obtain a mixture;

[0041] Add water with 40% of the weight of the mixture to the mixture, and then granulate it, control the particle size to 5-7mm, dry it naturally, and then calcinate in the air at 500°C for 2 hours to obtain the biological aerated filter filler.

[0042] The biological aerated filter filler prepared in this example is used as the carrier of microorganisms in the biological aerated filter:

[0043]The inoculum sludge used in the test was taken from the sludge in the oxidation ditch of the urban sewage treatment plant. Firstly, the filler filter material of the b...

Embodiment 3

[0047] The raw materials of the biological aerated filter filler in this embodiment are constituted by mass percentage as follows:

[0048] 75% montmorillonite, 15% sawdust, 10% magnetite (30% iron content).

[0049] The preparation method of the biological aerated filter filler of the present embodiment is as follows:

[0050] Pass montmorillonite, sawdust and magnetite respectively through a 200-mesh sieve and mix to obtain a mixture;

[0051] Add water with 50% of the mass of the mixture to the mixture, then granulate and shape, control the particle size to 5-7mm, dry naturally, and calcinate at 700°C for 3 hours in the air to obtain the biological aerated filter filler.

[0052] The biological aerated filter filler prepared in this example is used as the carrier of microorganisms in the biological aerated filter:

[0053] The inoculum sludge used in the test was taken from the sludge in the oxidation ditch of the urban sewage treatment plant. Firstly, the filler filter m...

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Abstract

The invention discloses biological aerated filter packing and a preparation method thereof. The raw materials of the biological aerated filter packing have the following composition in percentage by weight: 75 to 85 percent of aggregates, 5 to 30 percent of iron oxide and 10 to 20 percent of pore-forming agent. The biological aerated filter packing is obtained after the raw materials are ground and calcined. The biological aerated filter packing disclosed by the invention has the advantages of high porosity, large specific surface area, high strength, strong water resistant performance, high water absorption and the like. Moreover, relative to commercially available ceramsite and zeolite particles, porous ceramsite disclosed by the invention has high adsorption performance for phosphorus, can be repeatedly utilized by secondary calcination after reaching an adsorption saturation state and cannot pollute the environment.

Description

1. Technical field [0001] The invention relates to the recovery and reuse of agricultural by-product waste, in particular to a biological aerated filter filler and a preparation method thereof. 2. Background technology [0002] In recent decades, with the development of modern industry and urban construction, the problem of environmental pollution, especially water pollution, in Chinese cities has been particularly serious, and the problem of water resources has also become increasingly tense. my country is a country that lacks per capita water resources, only 1 / 4 of the world's per capita value, and the distribution is uneven in time and space, making development and utilization difficult, and many regions and cities are seriously short of water. At the same time, the annual sewage discharge in the country is about 35 billion cubic meters, but the centralized treatment rate of urban sewage is only 7%, and 80% of the sewage is discharged into rivers, lakes and seas without e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/10
CPCY02W10/10
Inventor 彭书传鲍腾陈冬舒林万正强侯成虎
Owner HEFEI UNIV OF TECH
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