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Porous slow-release carbon filler and preparation method and application thereof

A slow-release and zeolite technology, which is applied in the field of water treatment, can solve problems such as water distribution, gas distribution is not easy to be uniform, unfavorable microbial film growth, and does not meet the process requirements, etc., to achieve the reduction of external carbon sources, low price, and high compressive strength increased effect

Inactive Publication Date: 2019-04-12
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relatively expensive price of biological ceramsite and imported volcanic rock filter materials, traditional filter materials such as plastic honeycomb fillers do not meet the process requirements of BAF
Zeolite is used as the filler of the biological aerated filter. Due to its irregular shape, the water flow resistance is large, it is easy to block, and the distribution of water and air is not easy to be uniform.
The surface of zeolite has a negative charge, which is not conducive to the growth of microbial film formation when it is used alone as a biological aerated filter filler; if walnut shell film formation is used alone, under long-term operation, the packing column will collapse after long-term operation due to microbial decomposition
The application of BAF in engineering is greatly restricted

Method used

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  • Porous slow-release carbon filler and preparation method and application thereof
  • Porous slow-release carbon filler and preparation method and application thereof
  • Porous slow-release carbon filler and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Raw material preparation: zeolite, cement, walnut shell and aluminum are all made into powder;

[0058] (2) Stirring and granulation: The powder is mixed according to the mass ratio of zeolite powder: cement powder: walnut shell powder: aluminum powder = 100:30:1:0.05, and stir for 10min with a mixer, then add water Mix them, pass the pelletizing machine into strips, and finally press them into 6mm spherical particles;

[0059] (3) Curing: Curing the prepared spherical particles under natural conditions, spraying water every day for curing, and each time the surface of the spherical particles is soaked with water, the curing is successful after 12 days of curing, that is, the porous slow-release carbon filler is successfully prepared.

[0060] The compressive strength of the prepared porous slow-release carbon filler was measured. Small balls of uniform size were randomly selected, and the compressive strength was measured with the servo material multifunctional high and l...

Embodiment 2

[0062] (1) Raw material preparation: zeolite, cement, walnut shell and aluminum are all made into powder;

[0063] (2) Stirring and granulating: The powder is mixed according to the mass ratio of zeolite powder: cement powder: walnut shell powder: aluminum powder = 100:30:2:0.07, and stir for 20 minutes with a mixer, then add water Mix them, pass the pelletizing machine into strips, and finally press them into 7mm spherical particles;

[0064] (3) Curing: Curing the prepared spherical particles under natural conditions, spraying water every day for curing, and each time the surface of the spherical particles is soaked with water, the curing is successful after 12 days of curing, that is, the porous slow-release carbon filler is successfully prepared.

[0065] The compressive strength of the prepared porous slow-release carbon filler was measured. Small balls of uniform size were randomly selected, and the compressive strength was measured with the servo material multifunctional high ...

Embodiment 3

[0067] (1) Raw material preparation: zeolite, cement, walnut shell and aluminum are all made into powder;

[0068] (2) Stirring and granulation: The powder is mixed according to the mass ratio of zeolite powder: cement powder: walnut shell powder: aluminum powder = 100:30:3:0.09, and stir for 10 minutes with a mixer, then add water Mix them, pass the pelletizing machine into strips, and finally press into 8mm spherical particles;

[0069] (3) Curing: Curing the prepared spherical particles under natural conditions, spraying water every day for curing, and each time the surface of the spherical particles is soaked with water, the curing is successful after 12 days of curing, that is, the porous slow-release carbon filler is successfully prepared.

[0070] The compressive strength of the prepared porous slow-release carbon filler was measured. Small balls of uniform size were randomly selected, and the compressive strength was measured with the servo material multifunctional high and l...

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Abstract

The invention discloses a porous slow-release carbon filler and a preparation method thereof. The filler is prepared from, by mass, 1% of zeolite, 0.3-0.4% of cement, 0.01-0.03% of agricultural biomass waste and 0.0005-0.0009% of aluminum powder. The invention further discloses application of the porous slow-release carbon filler for treating wastewater in a biological aerated filter. The porous slow-release carbon filler and the preparation method and application thereof have the advantages that compared with other fillers, the biofilm culturing speed is quick under the equal conditions; theremoval effect on contaminants (COD, NH4<+>-N and TN) is good, not only can the porosity, adsorbability, ion exchange performance and stronger supporting effect of the zeolite be exerted, but also theagricultural biomass waste is used as a solid carbon source, additional carbon resources are reduced, and the damage of the filler in the later period of operation is also avoided.

Description

Technical field [0001] The invention belongs to the technical field of water treatment, and specifically relates to a porous slow-release carbon filler and a preparation method and application thereof. Background technique [0002] In response to the environmental problems caused by excessive nitrogen emissions, the country has added a new binding indicator, ammonia nitrogen, with the goal of reducing emissions. After nearly 10 years of vigorous advancement in total emission reduction, the two indicators of chemical oxygen demand and ammonia nitrogen have been improved effectively. It is now necessary to implement total nitrogen emission control on rivers that flow into eutrophic lakes and coastal cities at and above the prefecture level. . [0003] The filler can not only provide a carrier for the attachment of microorganisms, but also filter and intercept the suspended matter in the sewage. Filler is the core component of BAF, its specific surface area, porosity, particle size,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/10C02F101/16
CPCC02F3/106C02F2003/003C02F2101/16Y02W10/10
Inventor 丁绍兰王娟娟樊琼谢林花
Owner SHAANXI UNIV OF SCI & TECH
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