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Porous ceramic grain for disposing wastewater and method for preparing same

A technology for treating wastewater and manufacturing methods, applied in ceramic products, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of non-renewable energy consumption and secondary pollution, and achieve efficient degradation and utilization, long-term The effect of life and improvement of processing efficiency

Inactive Publication Date: 2009-06-03
CHINESE ACADEMY OF SCI THE JIAXING MATERIALS & CHEM TECH ENG CENT +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention of the present invention is proposed in order to overcome the existing problems such as the need to consume non-renewable energy and secondary pollution for pollution control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Clay, fly ash, and sludge from biogas fermentation tail liquid (that is, biogas residue or biogas mud) are used as the main raw materials, and polyacrylamide is used as the auxiliary material. Dry the clay and fly ash or dry them naturally until the moisture content is ≤15%. Weigh respectively: 500g of clay, 200g of fly ash, 300g of sludge, and 11g of polyacrylamide with a molecular weight of 1 million D.

[0011] Clay and fly ash were crushed to 200 mesh respectively.

[0012] The above-mentioned main and auxiliary materials were fully mixed in a mixing agitator for 60 minutes.

[0013] Put the mixed material into the rotary disc granulator to granulate, and the particle size is controlled at 2-100mm.

[0014] The pellets are sintered in an anaerobic high temperature furnace. First raise the temperature to 100°C, dehydrate and dry under this condition for 90 minutes; pass nitrogen gas to replace the air in the high-temperature furnace, continue to raise the temperat...

Embodiment 2

[0017] Clay, fly ash and sludge are used as main raw materials, and polyacrylamide is used as auxiliary materials. Dry the clay and fly ash or dry them naturally until the moisture content is ≤15%. Weigh respectively: clay 200g, fly ash 500g, sludge 600g, polyferric chloride 40g.

[0018] Clay and fly ash were crushed to 140 mesh respectively.

[0019] The above-mentioned main and auxiliary materials were fully mixed in a mixing agitator for 60 minutes.

[0020] Put the mixed material into the rotary disc granulator to granulate, and the particle size is controlled at 2-100mm.

[0021] The pellets are sintered in an anaerobic high temperature furnace. First raise the temperature to 150°C, dehydrate and dry under this condition for 80 minutes; pass nitrogen gas to replace the air in the high-temperature furnace, continue to raise the temperature to 450°C, and keep it for 50 minutes; finally raise the temperature to 1000°C, and sinter for 30 minutes.

[0022] The sintered ma...

Embodiment 3

[0024] Clay, fly ash, and sludge (can be biogas residue or biogas mud) are used as main raw materials, and polyacrylamide is used as auxiliary material. Dry the clay and fly ash or dry them naturally until the moisture content is ≤15%. Weigh respectively: 400g of clay, 300g of fly ash, 500g of sludge, and 65g of polyaluminum trichloride.

[0025] Clay and fly ash were crushed to 120 mesh respectively.

[0026] The above-mentioned main and auxiliary materials were fully mixed in a mixing agitator for 60 minutes.

[0027] Put the mixed material into the rotary disc granulator to granulate, and the particle size is controlled at 2-100mm.

[0028] The pellets are sintered in an anaerobic high temperature furnace. First raise the temperature to 200°C, dehydrate and dry under this condition for 70 minutes; pass nitrogen gas to replace the air in the high-temperature furnace, continue to raise the temperature to 500°C, and keep it for 40 minutes; finally raise the temperature to 8...

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Abstract

The invention discloses a porous ceramic grain for disposing wastewater, which is ball-shaped or cylinder-shaped porous ceramic grain which is prepared in a way that auxiliary materials such as fly ash, sewage sludge and clay are formed, sintered at high temperature, and subsequently scattered. The porous ceramic grain has the obvious advantages and beneficial effects that the environment-protective product with high economic value and long service life is produced by taking fly-ash, sewage sludge and natural clay as raw material so as to achieve the object of waste utilization. A micro-pore carbon powder which has excellent combination with ceramic structure is formed under a specified sintering condition, can absorb organisms in wastewater disposal and becomes biological immobilized material with high loading due to excellent biocompatibility. Meanwhile, the adsorbed organism forms a local high-consistency area, thus improving the disposal efficiency of fixed bed biofilter. After the porous grain is used for a period and when the sewage filtration quantity is obviously reduced, the ceramic grain material is dried and regenerated under the same sintering condition, thus realizing the circular use of the pollution control material and generating no secondary contamination.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment. The fly ash produced in the production process of a thermal power plant is used as the main raw material, and a spherical and cylindrical porous ceramsite for treating waste water is produced through high-temperature sintering and a manufacturing method thereof. Background technique [0002] At present, there are many methods for industrial wastewater and urban domestic sewage treatment, which can generally be divided into physical and chemical methods, chemical methods and biological methods. Among them, the biological method mostly uses aerobic bacteria for biological aeration, or uses anaerobic fermentation to eliminate the main organic matter in sewage, and then uses nitrification and denitrification biotechnology to reduce ammonia nitrogen and organic phosphorus in wastewater. At present, a variety of single or combined treatment technologies have been developed at home and abr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B33/132C02F1/28C02F3/10
CPCY02P40/60
Inventor 章俭薛莲
Owner CHINESE ACADEMY OF SCI THE JIAXING MATERIALS & CHEM TECH ENG CENT
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