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Ceramsite filler and chemical modification method thereof

A technology of chemical modification and ceramsite, which is applied in chemical instruments and methods, chemical/physical processes, chemical/physical/physical chemical processes, etc., can solve the problem of poor fixed adhesion, uneven biofilm distribution, and biofilm hanging time. Long-term problems, to achieve the effect of improving the purification effect, reducing investment and operating costs

Inactive Publication Date: 2014-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the technical deficiencies in the prior art, such as long time for biofilm formation, uneven biofilm distribution, poor fixation adhesion, and low impact load resistance, the present invention becomes a kind of biofilm by chemically modifying the inner surface of the original ceramsite filler A new type of ceramsite filler can better immobilize a specific target microorganism and improve the treatment effect on pollutants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] After repeatedly rinsing the ceramsite with distilled water, dry it for 2 hours; 2 SO 4 Immerse in the solution for 40 hours, wash with water until it is neutral; put it in an oven and dry it at 105oC for about 2 hours; put the dried ceramsite into a solution containing 1.5mol / L FeCl before cooling. 3 Immerse in the modifier of the solution for 40 hours; put it in an oven and dry it at 105oC for 2 hours; put the impregnated and dried ceramsite in a muffle furnace, bake it at 400oC for 3 hours, and cool it at room temperature; Rinse it with distilled water and dry it for 2 hours to form a modified ceramsite filler.

[0021] After testing and analysis, the ceramsite is chemically modified, and the performance parameters of the modified ceramsite are: density 2.5 g / cm 3 , specific surface area 0.8 m 2 / g, porosity 0.7, isoelectric point pH 9.0, surface pH 5.0.

Embodiment 2

[0023] After repeatedly rinsing the ceramsite with distilled water, dry it for 2 hours; 2 SO 4 Immerse in the solution for 20 hours, wash with water until neutral; place it in an oven and dry it at 105oC for about 2 hours; put the dried ceramsite into a solution containing 0.5 mol / L FeCl before cooling. 3 Immerse in the modifier of the solution for 20 hours; put it in an oven and dry it at 105oC for 2 hours; put the impregnated and dried ceramsite in a muffle furnace, bake it at 300oC for 1 hour, and cool it at room temperature; Rinse it with distilled water and dry it for 2 hours to form a modified ceramsite filler.

[0024] After testing and analysis, the ceramsite is chemically modified, and the performance parameters of the modified ceramsite are: density 2.12 g / cm 3 , specific surface area 0.45 m 2 / g, porosity 0.57, isoelectric point pH 7.56, surface pH 5.96.

Embodiment 3

[0026] After repeatedly rinsing the ceramsite with distilled water, dry it for 2 hours; 2 SO 4 Immerse in the solution for 20 hours, wash with water until neutral; put it in an oven and dry it at 105oC for about 2 hours; put the dried ceramsite into a solution containing 1 mol / L FeCl 3 Immerse in the modifier of the solution for 40 hours; put it in an oven and dry it at 105oC for 2 hours; put the impregnated and dried ceramsite in a muffle furnace, bake it at 500oC for 3 hours, and cool it at room temperature; Rinse it with distilled water and dry it for 2 hours to form a modified ceramsite filler.

[0027] After testing and analysis, the ceramsite is chemically modified, and the performance parameters of the modified ceramsite are: density 2.43 g / cm 3 , specific surface area 0.68 m 2 / g, porosity 0.65, isoelectric point pH 8.4, surface pH 5.2.

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PUM

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Abstract

The invention belongs to the field of new materials, and relates to ceramsite filler and a chemical modification method thereof. By taking common ceramsite filler as a carrier, after the common ceramsite filler is subjected to water washing, acid pickling, drying and sterilizing processes and the like, and the obtained object is impregnated in a modifier, ceramsites are fully contacted, and the physical and chemical properties of the inside and outside surfaces of the ceramsites are changed; and after the obtained product is subjected to high-temperature roasting, the modifier is concentrated, and metal oxides are deposited on the surfaces of the ceramsites, therefore, the modified ceramsite filler is obtained. Microbial strains are more easily attached to the surface of the ceramsite filler subjected to chemical modification, therefore, the ceramsite filler has the advantages of short biofilm culturing time, uniform biofilm distribution, high impact resistant load, and the like. The ceramsite filler subjected to chemical modification can be widely used in biological filter materials for biofilm trickling bio-filters, and has a broad application prospect in the fields of wastewater treatment, waste gas purification, volatile organic compound separation, and the like.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a ceramsite filler modified by a chemical method. Background technique [0002] The packing is the carrier of microorganisms in the biofilm trickling filter tower, and is the main place for biological fixation and pollutant treatment. The properties of the filler directly affect the growth of the biomass in the packed layer, the energy consumption of the system, and the gas-liquid-solid three-phase mass transfer process and distribution coefficient of the odorous pollutants. Therefore, the performance of the packing directly affects the treatment efficiency of the biofilm trickling filter. According to the adsorption theory, the filler should be selected with large specific surface area, good bio-affinity, anti-acid, anti-alkali and oxidation resistance, long service life, light weight, high mechanical strength, convenient installation and maintenance, and low price. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/30
Inventor 郝爱香毛松柏孔京
Owner CHINA PETROLEUM & CHEM CORP