Biochemical ceramic as well as preparation method and application thereof

A ceramic and biochemical technology, applied in ceramic products, chemical instruments and methods, applications, etc., can solve the problems of no decolorization, lack of microbial carbon source in ceramics, adding fixed sludge, etc.

Inactive Publication Date: 2009-07-08
INST OF SOIL & FERTILIZER SHANDONG ACAD OF AGRI SCI
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] In the prior art, the heating or firing of sludge is mostly carried out in an aerobic environment, and the carbon source is lost during the firing process, so that the fired ceramics lack the carbon source required by microorganisms and have no decolorization function
In addition, in the prior art, no materials for fixing heavy metals in sludge have been found in the formula, and the sludge containing heavy metals lacks utilization ability or low utilization efficiency

Method used

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  • Biochemical ceramic as well as preparation method and application thereof
  • Biochemical ceramic as well as preparation method and application thereof
  • Biochemical ceramic as well as preparation method and application thereof

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Embodiment Construction

[0008] A biochemical ceramic is fired from the following raw materials, and the amounts of each component are parts by weight:

[0009] 30-40 parts of sludge, 8-15 parts of calcium carbonate or gypsum, 12-42 parts of clay, 0-10 parts of sawdust, 2-4 parts of calcium hydroxide dihydrate, 0-10 parts of kaolin, 1-15 parts of liquid wax , 0-10 parts of iron powder or iron oxide powder, 0-5 parts of activated carbon, and 0-10 parts of coal powder. The sludge mentioned above is the surplus sludge of the sewage treatment plant.

[0010] The preparation method of biochemical ceramics of the present invention, the steps are as follows:

[0011] (1) Mix various raw materials according to the formula of the above-mentioned biochemical ceramics, adjust them into mud or granular mud particles, use templates to make shapes, and dry them to form blanks;

[0012] (2) Place the finished billet prepared in step (1) into a high-temperature oven for firing, and the heating rate of the oven temp...

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Abstract

The invention relates to biochemical ceramic and a preparation method and application thereof. The biochemical ceramic adopts wastewater sludge as a main raw material and is prepared through the supplementary materials of calcium carbonate or gypsum, clay, dehydrate calcium hydroxide, liquid wax, iron dust or brown iron oxide via anoxic burning. The biochemical ceramic can be used as a biological medium of a granular sludge bed in a biological filter or a trickling filter or during the anaerobic treatment, and can also be used for reducing the water body eutrophication or build a filtration dam to reduce the pollution caused by the wastewater. The retractable biochemical ceramic can automatically fix bacteria so as to prevent the biomass from being flushed away without artificial fixation, and can immobilize the heavy metal elements in the sludge and release no heavy metal elements in the application process. The biochemical ceramic can be used for preparing cogs with different shapes and sizes; therefore, the biochemical ceramic has a wider application prospect.

Description

technical field [0001] The invention relates to a biochemical ceramic used as a biological medium prepared by utilizing waste water sludge and a preparation method thereof, belonging to the technical field of waste water treatment. Background technique [0002] Sewage treatment plants, paper industry wastewater treatment facilities and other wastewater biological treatment facilities produce large amounts of exhaust sludge. Because sludge contains a large number of harmful substances such as pathogenic bacteria and heavy metals, the harmless treatment and reuse of sludge has become a worldwide technical problem. For example, harmful substances such as pathogenic bacteria and heavy metals in sludge make it difficult to use as fertilizer. The traditional treatment method is dehydration, drying, and landfill in landfill, but landfill in landfill occupies a large amount of land. Another treatment method is to use aerobic incineration to reduce the volume of sludge, but the inci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B38/00C02F3/02C12N11/14B01D39/06B01D39/20
CPCY02P40/60Y02W10/10
Inventor 董良杰刘兆辉刘英袁长波
Owner INST OF SOIL & FERTILIZER SHANDONG ACAD OF AGRI SCI
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