Biodegradation-based sludge brick-making technology

A technology for making bricks from sludge and biodegradation, which is applied in biological sludge treatment, dewatering/drying/concentrating sludge treatment, solid waste management, etc. It can solve problems such as strength reduction, impact on brick-making performance, and limited proportions.

Inactive Publication Date: 2012-03-28
CHONGQING JUKANG BUILDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increase of the content of high volatile organic matter will lead to a cubic decrease in the strength of the product, and the high content of high volatile organic matter will seriously affect the strength of the product
Moreover, the organic matter in the sludge is extremely water-absorbing, and the sludge after direct pressure filtration and drying still contains a large amount of water, which seriously affects its brick-making performance and limits its proportion as a raw material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The present invention adopts biodegradable sludge brick making process, comprising the following steps:

[0019] The first step is biological anaerobic treatment. The sludge containing 20% ​​to 80% of high volatile organic matter is put into the fermentation tank for fermentation. The fermentation temperature is 30°C and the fermentation time is 10 days, and the fermentation sludge with organic matter content below 10% is obtained. mud;

[0020] In the second step, drying treatment, the fermented sludge is dehydrated by pressure filtration to obtain dried sludge with a water content of 20% to 30%;

[0021] The third step is to stir and mix the dry sludge and brick-making raw materials such as shale that is broken to less than 1mm, mix, grind and homogenize, and then send it to the aging warehouse for aging, wherein the weight of the dried sludge accounts for 40% of the total weight. %~60%;

[0022] The fourth step is forming and cutting bricks, adding the brick-making...

Embodiment 2

[0027] The present invention adopts biodegradable sludge brick making process, comprising the following steps:

[0028] The first step is biological anaerobic treatment. The sludge containing 20% ​​to 80% of high volatile organic matter is put into the fermentation tank for fermentation. The fermentation temperature is 40°C and the fermentation time is 9 days, and the fermentation sludge with organic matter content below 10% is obtained. mud;

[0029] In the second step, drying treatment, the fermented sludge is dehydrated by pressure filtration to obtain dried sludge with a water content of 20% to 30%;

[0030] The third step is to stir and mix the dry sludge and brick-making raw materials such as shale that is broken to less than 1mm, mix, grind and homogenize, and then send it to the aging warehouse for aging, wherein the weight of the dried sludge accounts for 40% of the total weight. %~60%;

[0031] The fourth step is forming and cutting bricks, adding the brick-making ...

Embodiment 3

[0036] The present invention adopts biodegradable sludge brick making process, comprising the following steps:

[0037] The first step is biological anaerobic treatment. The sludge containing 20% ​​to 80% of high volatile organic matter is put into the fermentation tank for fermentation. The fermentation temperature is 35°C and the fermentation time is 7 days, and the fermentation sludge with organic matter content below 10% is obtained. mud;

[0038] In the second step, drying treatment, the fermented sludge is dehydrated by pressure filtration to obtain dried sludge with a water content of 20% to 30%;

[0039] The third step is stirring and mixing, mixing and homogenizing the dried sludge and shale crushed to less than 1 mm, and then sending it to the aging warehouse for aging, wherein the weight of the dried sludge accounts for 40% to 60% of the total weight ;

[0040] The fourth step is forming and cutting bricks, adding the brick-making materials aged in the third step ...

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Abstract

The invention relates to a biodegradation-based sludge brick-making technology. Compared with a traditional technology, the biodegradation-based sludge brick-making technology is characterized in that a step of anaerobic treatment is added. Fermentation is carried out and then filter-pressing dehydration treatment is performed, so that the content of organic matters in sludge is reduced to below 10% and the content of water is reduced to 20%-30%, thereby obtaining brick-making sludge suitable for being added to a brick-making material, such as shale and the like. According to the traditional technology, the filter-pressing dehydration treatment is directly performed, so that the content of water in the sludge is only reduced to about 80% and the content of organic volatile matters is above 20%. Generally, the total added weight of the sludge, which contains 80% of water and more than 20% of organic matters and is added for making a brick, is only 30% of the weight of the brick-making material. In the brick-making sludge which is suitable for being added to the brick-making material and is obtained according to the biodegradation-based sludge brick-making technology, the content of organic matters is reduced to below 10% and the content of water is reduced to 20%-30%, and the total added weight of the sludge used for making the brick can be 40%-60% of the weight of the brick-making material, thereby saving raw materials, lowering cost and greatly promoting the capacity for treating the sludge.

Description

technical field [0001] The invention relates to a manufacturing process of brick-making sludge, in particular to a brick-making process using biodegradable sludge. Background technique [0002] The sludge discharged from urban sewage treatment plants contains both organic matter with a certain calorific value and other harmful substances. Among them, the biological content is high and unstable, and contains more germs and parasites. If it is not handled properly, it will cause secondary pollution. The best way to deal with sludge is recycling, and making bricks from sludge is the best way to use it. [0003] Sludge is used as a raw material for the manufacture of sintered products, and the sludge is harmless during high-temperature roasting, preventing secondary pollution. In the process of manufacturing sintered products, the organic matter with a certain calorific value in the sludge supplements the heat of high-temperature roasting and reduces energy consumption. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04C02F11/12C04B18/30
CPCY02W30/91
Inventor 周炫张信聪
Owner CHONGQING JUKANG BUILDING MATERIAL
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