Integral treatment utilization method for sludge produced from water works

A waterworks, comprehensive treatment technology, applied in dehydration/drying/concentrated sludge treatment, sewage/sludge fertilizer, application, etc. and other problems, to achieve the effect of increasing rainfall, improving air and soil moisture, and improving the ecological environment

Inactive Publication Date: 2008-07-09
浙江大洲固体废物处置研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the whole, each method has its own desirability, but due to the large amount of sludge to be treated, and each method has certain limitations, it cannot realize the resource treatment of sludge well. Therefore, it is necessary to Finding better ways to further treat and utilize sludge

Method used

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  • Integral treatment utilization method for sludge produced from water works

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Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1, referring to Fig. 1, the method for comprehensive treatment and utilization of the sludge produced by the waterworks in this example comprises the following steps:

[0014] 1) The sludge used in this example comes from Tangqi Water Plant of Hangzhou Yuhang Water Supply Group Co., Ltd. The sludge produced by the waterworks is different from the sludge produced by the sewage treatment plant. The sludge discharge water is mainly composed of sedimentation tank or clarification tank sludge discharge and filter backwash wastewater, and its water volume generally accounts for about 3% of the total water production of the waterworks~ 7%. The sludge water from the waterworks contains a large amount of suspended matter, and its total solid content is generally between 0.1% and 2%, that is, the sludge moisture content is above 95%. The sludge with high water content has a large volume, which is not conducive to storage and transportation. According to experiments an...

Embodiment 2

[0021] Embodiment 2, please refer to Figure 1, the implementation steps of this example are as follows:

[0022] 1) The sludge is the sludge from the sedimentation tank of the waterworks, which is concentrated by gravity sedimentation for a certain period of time, and most of the void water is removed to obtain dewatered sludge.

[0023] 2) Add the additive fly ash whose dosage is 30% of the mass of the dewatered sludge to form mixed sludge.

[0024] 3) The mixed sludge is made into a strip-shaped pile with a width of 1.5 meters and a height of 1 meter, and the pile is retting for 15 days to allow it to fully ferment and form semi-dried sludge.

[0025] 4) Use a pulverizer to process the semi-dried sludge into sludge particles with a maximum particle size of no more than 8 cm, and then wrap the sludge particles with non-woven fabrics. The volume of each bag of sludge particles is controlled at about 0.5 cubic meters , and disperse and bury them 10 centimeters below the desert...

Embodiment 3

[0027] Embodiment 3, please refer to Figure 1, the implementation steps of this example are as follows:

[0028] 1) The sludge is the sludge from the sedimentation tank of the waterworks, which is concentrated by gravity sedimentation for a certain period of time, and most of the void water is removed to obtain dewatered sludge.

[0029] 2) Adding additive sawdust in an amount of 15% of the mass of the dewatered sludge to form mixed sludge.

[0030] 3) The mixed sludge is made into a strip-shaped pile with a width of 1.5 meters and a height of 1 meter, and the pile is retting for 11 days to allow it to fully ferment and form semi-dried sludge.

[0031] 4) Use a pulverizer to process the semi-dried sludge into sludge particles with a maximum particle size of no more than 8 cm, and then wrap the sludge particles with non-woven fabrics. The volume of each bag of sludge particles is controlled at about 0.28 cubic meters , and disperse and bury it 7 cm below the desert dust.

[0...

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Abstract

The invention relates to a method for comprehensively processing and utilizing sludge produced by water supply works. The technical problems which need to be resolved by the invention are solidification and improvement for desert soil, better harnessing for deserts and changing the sludge which is in need of money to harness originally into resource. The technical scheme of resolving the problems comprises: 1) employing the sludge produced by the water supply works to remove a majority of interstitial water in the sludge via gravitional settling and concentrating, and obtaining dewatered sludge, 2) adding additives in the dewatered sludge to form blended sludge, 3) piling the blended sludge in a bar pile which is 1.5 meters in width and 1 meter in height, stacking retting for 7-15 days and forming half-dewatered sludge after fermentation, 4) using a crusher to process the half-dewatered sludge into granules, wherein the maximum granular size of the sludge granules does not exceed 8 centimeters, then wrapping the sludge granules with non-woven fabrics, controlling volume of each bag of the sludge granules at a scale of 0.05-0.5 cubic meter, then burying dispersedly the sludge granules in the place which are 5-10 centimeters below desert dirt. The invention is mainly adapted for processing and handling the sludge produced by the water supply works.

Description

technical field [0001] The invention relates to a method for comprehensive treatment and utilization of sludge produced in a waterworks. It is mainly suitable for sludge treatment and disposal in waterworks, and can also be used in other occasions that require sludge treatment, such as sludge treatment in urban sewage treatment plants, lake or inland river sediment treatment, etc. Background technique [0002] At present, the treatment methods of water plant sludge mainly include: discharge into the sewer and be treated by urban sewage treatment plants; landfill of dehydrated cakes; sanitary landfill of dehydrated cakes and ocean disposal of dehydrated cakes. On the whole, each method has its own desirability, but due to the large amount of sludge to be treated, and each method has certain limitations, it cannot realize the resource treatment of sludge well. Therefore, it is necessary to Find better ways to further process and utilize sludge. The invention proposes that th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F7/00C05G3/04C02F11/12C05G3/80
CPCY02A40/20
Inventor 王威平
Owner 浙江大洲固体废物处置研究所
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