Mangneto modified ceramsite filler, preparation method thereof and application of modified filler in wastewater processing

A ceramsite and modified technology, which is applied in the field of modified ceramsite filler and its preparation, can solve the problems of research and application that have not been reported in literature and patent disclosure, low efficiency of biological treatment, large area of ​​treatment facilities, etc.

Inactive Publication Date: 2013-03-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Magneto-induced physical and chemical biological effects can improve the biological activity of microorganisms in water, improve the ability of microorganisms to adsorb and degrade organic pollutants, significantly improve the biodegradation efficiency of wastewater, and improve the current low efficiency of wastewater biological treatment and large area of ​​treatment facilities. situation
[0006] At present, there are no literature reports and patent publications on the research and application of modified ceramsite fillers for wastewater treatment using the magnetic physical, chemical and biological effects of magnetic powder.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The ceramsite prepared from fly ash has a particle size of 15-20mm and a BET specific surface area of ​​300-500m 2 / g, weighed after drying. The ceramsite is soaked in 1mol / L hydrochloric acid solution for 3h, then soaked in 1mol / L sodium hydroxide solution for 2h, rinsed with distilled water until neutral; To the treated ceramsite particles, add ferric oxide, chitosan, and polyacrylamide in the ceramsite particles to account for 15%, 5%, and 10% of the total weight of the magnetically modified ceramsite filler respectively, and stir for 15 minutes , let stand for 2 hours, dry and dehydrate at a temperature of 100°C for 6 hours; then mix and roast the mixed filler at a temperature of 170°C for 15 minutes; then shape and roast the mixed and roasted filler at a temperature of 200°C for 10 minutes , that is, a magnetically modified ceramsite filler is obtained. The prepared magnetically modified ceramsite filler was loaded into the aerobic reactor with a filling ratio of...

Embodiment 2

[0025] The ceramsite prepared from coal gangue has a particle size of 5-10mm and a BET specific surface area of ​​300-500m 2 / g, weighed after drying. The ceramsite is soaked in 2mol / L hydrochloric acid solution for 1h, then soaked in 2mol / L sodium hydroxide solution for 4h, and rinsed with distilled water until neutral; Stone and polyacrylamide are added to the treated ceramsite, and the ferric oxide, ferric oxide, hydroxyapatite and polyacrylamide added to the ceramsite filler respectively account for 10% of the total weight of the magnetically modified ceramsite filler. 15%, 10%, 10%, 5%, stirring for 20min, standing for 2h, drying and dehydrating, the temperature is 120°C, the time is 8h; then the mixed filler is kneaded and roasted at 150°C for 30min; then the kneaded The calcined filler was molded and calcined at 200°C for 10 min to obtain a magnetically modified ceramsite filler. The prepared magnetically modified ceramsite filler was loaded into the aerobic reactor w...

Embodiment 3

[0027] The ceramsite prepared from clay has a particle size of 5-15mm and a BET specific surface area of ​​300-500m 2 / g, weighed after drying. The ceramsite was soaked in 2mol / L hydrochloric acid solution for 4 hours, then soaked in 1mol / L sodium hydroxide solution for 2 hours, and rinsed with distilled water until neutral; iron oxide, starch, chitosan, polyacrylamide Added to the treated ceramsite, iron oxide, starch, chitosan, and polyacrylamide added to the ceramsite filler accounted for 20%, 1%, 1%, and 30% of the total weight of the magnetically modified ceramsite filler, respectively. %, stirring for 30min, standing for 2h, drying and dehydration, the temperature is 110℃, the time is 8h; then the mixed filler is mixed and roasted at 150℃ for 30min; then the mixed and roasted filler is mixed and roasted at 200℃ After molding and firing for 10 min, a magnetically modified ceramsite filler was obtained. The prepared magnetically modified ceramsite filler was loaded into ...

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Abstract

The invention which discloses a mangneto modified ceramsite filler, a preparation method thereof and an application of the modified filler in wastewater processing belongs to the wastewater processing field. The modified filler is a magnetic filler which treats ceramsite as a base material and contains mixed magnetic powder, a biological affinity substance and a dispersant. The preparation method of the modified filler comprises the following steps: 1, respectively immersing ceramsite in an acid liquor and an alkali liquor; 2, adding modification materials, and processing; and 3, mixing, and molding calcining. A method for improving the biological processing of the wastewater with the modified filler is characterized in that: the mangneto modified ceramsite filler is filled in an aerobic reactor according to a packing ratio of 35-50%, the wastewater is introduced, the retention time is 4-6, the volume loading is controlled at 0.5-2kgCOD / (m<3>.d), and the gas-water ratio in the aeration process is 5-15:1. Characteristics of the mangneto modified ceramsite filler are fully utilized in the invention to allow the wastewater processing efficiency to be improved, the wastewater processing cost to be saved, the service life of advanced processing equipment to be prolonged and large scale industrialization application to be easy.

Description

technical field [0001] The invention relates to a modified ceramsite filler and its preparation method and application, in particular to a magnetically induced modified ceramsite filler, its preparation method and its application in wastewater treatment. Background technique [0002] In recent years, with the rapid development of our country's economy, the environmental problems that have emerged in developed countries in the past century have suddenly appeared in our country, especially the massive discharge of various industrial wastewater has seriously affected the water environment of our country. There are many sources of industrial wastewater pollution, the discharge volume is large, and the discharge concentration is ever-changing. At present, the discharge of industrial wastewater in our country has far exceeded the capacity that the environment can bear. If we do not strengthen the theoretical research and technical application of industrial wastewater treatment tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/10
CPCY02W10/10
Inventor 任洪强李秋成张涛丁丽丽许柯任鑫坤
Owner NANJING UNIV
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