Urban waters mud local dewatered process

A sludge and urban technology, applied in the field of sludge dehydration process, can solve the problems of sludge precipitation, long dehydration and consolidation time, large land occupation, regeneration pollution, etc., and achieve remarkable economic and social ecological benefits

Inactive Publication Date: 2006-06-28
HOHAI UNIV
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  • Summary
  • Abstract
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Problems solved by technology

Some use silt storage tanks for sedimentation and consolidation, but this method not only requires long-distance pipelines or tank trucks to transport silt, but also takes up a lot of land; in addition, there is also a method of dehydration and consolidation of silt in sedimentation tanks. , The dehydration and consolidation time is quite long, usually 6-9 months, and the harmful elements in the sludge seep into the ground, causing migratory secondary pollution
Due to the embarrassment of the existing sludge treatment process, some even discharge the sludge into the big rivers illegally, resulting in repeated pollution incidents

Method used

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Examples

Experimental program
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Embodiment Construction

[0005] Use high-concentration (concentration up to about 90%, in the form of paste) sludge digging and conveying device (model YT series or and SJS series), so that the sludge can be pumped with a pump (model YT series or and SJS series) with the water content as low as possible SJS series) are transported to the on-site silt storage target to provide preconditions for efficient dehydration of sludge; the on-site silt storage target is an environmentally friendly silt storage tube bag, which is made of two specially treated anti-aging polypropylene fibers (after cooling Pulled high-strength monofilament and mesh filament with high filterability) through diamond-shaped weave (similar to the weave method of twill khaki cloth, the front side is regarded as dense and without gaps when facing the light upwards, and the pores are arranged neatly when viewed obliquely facing the light upwards) ) woven, or polyester (polyester) filament woven. It has the characteristics of high streng...

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Abstract

A method for in-situ dewatering of the silt in water system of urban area includes such steps as preparing the tubular bag whose size and shape are determined by the local terrain, digging the silt from the bottom of lake or river and conveying it in said tubular bags, and laying aside for filtering the water under the action of the pressure from bag wall and the dead weight while solidifying the solid for 3-5 weeks.

Description

technical field [0001] The invention relates to a method for in-situ, environment-friendly, efficient dehydration and consolidation of sludge in urban water areas and sewage treatment plants, and belongs to the technical field of sludge dehydration technology. Background technique [0002] A large amount of pollutants enter urban rivers and lakes, and accumulate at the bottom of lakes and rivers year by year to form silt. What some adopt to the processing of silt is to focus on desilting as a project, yet it needs to solve the outlet problem of silt. Some use silt storage tanks for sedimentation and consolidation, but this method not only requires long-distance pipelines or tank trucks to transport silt, but also takes up a lot of land; in addition, there are also methods of dehydration and consolidation of silt in sedimentation tanks. 1. The dehydration and consolidation time is quite long, usually 6 to 9 months, and the harmful elements in the sludge seep into the ground,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
Inventor 束一鸣赵坚张乃国赵晓光
Owner HOHAI UNIV
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