A kind of composite biofiller and preparation method thereof

A technology of biological fillers and pellets, applied in the field of ceramic fillers, can solve the problems of large proportion of inorganic fillers, difficulty in forming fluid state, small specific surface area, etc.

Active Publication Date: 2019-04-23
CAPITAL GREINWORTH ENVIRONMENTAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic fillers have disadvantages such as large specific gravity, small specific surface area, slow film formation, non-wear resistance, difficulty in forming a fluid state, high price, and difficulty in obtaining materials.

Method used

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  • A kind of composite biofiller and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Attapulgite and bituminous coal are both 200 mesh. Mix 60% of attapulgite with 40% of bituminous coal (mass ratio), and prepare pellets with a particle size of 6-8mm by using a disc granulator. Put the sample in a tray to dry naturally for 24 hours, put it in a ceramic crucible, heat it up to 120°C in a constant temperature blast drying oven, take it out after drying for 2 hours, and put it directly in a box-type resistance furnace for sintering for 2 hours, the sintering temperature is 1000 ℃, keep warm for 20min and then cool down to room temperature naturally to make the required filler.

Embodiment 2

[0049] Attapulgite and bituminous coal are both 200 mesh. Mix 70% of attapulgite with 30% of bituminous coal (mass ratio), and prepare pellets with a particle diameter of 6-8mm by using a disc granulator. Put the sample in a tray to dry naturally for 24 hours, put it in a ceramic crucible, heat it up to 120°C in a constant temperature blast drying oven, take it out after drying for 2 hours, and put it directly in a box-type resistance furnace for sintering for 2 hours, the sintering temperature is 1000 ℃, keep warm for 20min and then cool down to room temperature naturally to make the required filler.

Embodiment 3

[0051] Attapulgite and bituminous coal are both 200 mesh. Mix 80% of attapulgite with 20% of bituminous coal (mass ratio), and prepare pellets with a particle size of 6-8mm by using a disc granulator. Put the sample in a tray to dry naturally for 24 hours, put it in a ceramic crucible, heat it up to 120°C in a constant temperature blast drying oven, take it out after drying for 2 hours, and put it directly in a box-type resistance furnace for sintering for 2 hours, the sintering temperature is 1000 ℃, keep warm for 20min and then cool down to room temperature naturally to make the required filler.

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Abstract

The invention relates to a composite biological filler and a preparation method thereof. The composite biological filler comprises a filler main body and a pore-forming agent, wherein the pore-forming agent is 20 to 67 percent of the filler main body by weight; the filler main body is attapulgite; the pore-forming agent is one or more of bituminous coal, anthracite, activated carbon, maize straw, sawdust, ammonium chloride, ammonium oxalate, sodium carbonate, and sodium bicarbonate. The preparation method comprises the following steps: mixing 60 to 80 percent of attapulgite and 20 to 40 percent of bituminous coal; preparing pellet samples of which the particle sizes are 6-8 mm from the obtained mixture; drying the pellet samples in air; carrying out heating, drying, and sintering; cooling to the room temperature, so as to obtain the composite biological filler.

Description

technical field [0001] The invention relates to a ceramic filler for domestic sewage treatment, in particular to a composite biological filler and a preparation method thereof. Background technique [0002] With the acceleration of industrialization and urbanization, water pollution has become an important factor restricting my country's economic development. In today's increasingly stringent water quality requirements for urban sewage treatment, especially the strict control of nitrogen, the effective removal of nitrogen will inevitably receive more and more attention. [0003] The biological denitrification method is to convert ammonia nitrogen into nitrogen gas through nitrification and denitrification process under the action of microorganisms, and finally realize the removal of nitrogen from water, which is the most effective way of nitrogen removal. In the biological treatment process, since the aerobic granular sludge or biofilm has a certain thickness, an aerobic-an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
CPCC02F3/301C02F3/308C02F2003/001
Inventor 李媛郭召海
Owner CAPITAL GREINWORTH ENVIRONMENTAL CORP
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