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Biochemical ceramic as well as preparation method and application thereof

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

Inactive Publication Date: 2011-05-04
INST OF SOIL & FERTILIZER SHANDONG ACAD OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 amount of each component is part 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 wood chips, 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, 0-10 parts of coal powder. The above-mentioned sludge is the surplus sludge of the sewage treatment plant.

[0010] The preparation method of the biochemical ceramics of the present invention has the following steps:

[0011] (1) Mix various raw materials according to the above-mentioned biochemical ceramic formula, prepare them into mud or granular mud, use a template to make and shape, and dry into a blank;

[0012] (2) Place the blank obtained in step (1) in a high-temperature oven for firing. The heating rate of the oven temperature is not more than 100°C per hour. When t...

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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 biologicalmedium 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 shapesand sizes; therefore, the biochemical ceramic has a wider application prospect.

Description

Technical field [0001] The invention relates to a biochemical ceramic prepared by using wastewater sludge as a biological medium and a preparation method thereof, and belongs to the technical field of wastewater treatment. Background technique [0002] Sewage treatment plants, paper industry wastewater treatment facilities and other wastewater biological treatment facilities produce large amounts of waste gas and sludge. Because the sludge contains a lot of pathogenic bacteria, heavy metals and other harmful substances, the harmless treatment and reuse of sludge has become a worldwide technical problem. Harmful substances such as pathogenic bacteria and heavy metals in the sludge make it difficult to be used as fertilizer. The traditional treatment method is dehydration, drying, and landfill, but the landfill takes up a lot of space. Another treatment method is to use aerobic incineration to reduce the volume of sludge, but the incineration process produces harmful substances su...

Claims

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Application Information

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Patent Type & Authority Patents(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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