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Method for promoting rapid drying of dredged silt by microorganism

A technology for dredging sludge and microorganisms, which is applied in the field of microorganisms to promote the rapid drying of dredged sludge, and can solve the problems of long vacuum pre-pressing treatment period, difficulty in reaching the mud content, and difficulty in reaching the plastic limit, etc.

Active Publication Date: 2012-12-12
JIANGSU JIANGDA ECOLOGICAL SCI & TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The above methods have achieved certain results, but the problems of long treatment period and difficulty in reaching the plastic limit after treatment have not been fundamentally resolved.
[0010] The vacuum preloading method is the most widely used due to its advantages of large processing capacity, simple process, low cost, and no secondary pollution. , The permeability coefficient is low, and the remaining water in the later stage of treatment is extremely difficult to discharge, which makes the treatment period of the vacuum preloading method longer and the mud content after treatment is still difficult to reach above the plastic limit.

Method used

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  • Method for promoting rapid drying of dredged silt by microorganism
  • Method for promoting rapid drying of dredged silt by microorganism

Examples

Experimental program
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Effect test

Embodiment 1

[0100] A method for rapid drying of dredged silt by microorganisms, using the following steps:

[0101] (1) Construct a drying pond with an internal size of 100m (length)×100m (width)×5m (depth) as a sludge storage yard, excavate 3m below the ground at a depth of 5m, pile up a cofferdam height of 2m, and have a total volume of about 50,000m 3 , 2 layers of sealing film are laid inside for anti-seepage treatment.

[0102] (2) Using water hyacinth, rice straw, and cow dung with a dry mass ratio of 1:1:0.2 as raw materials, a large anaerobic fermentation tank is used as a container to domesticate gas-producing microorganisms. The domestication temperature is 30°C and the solid-to-liquid ratio is 1: 5. The daily gas production was detected, and the fermentation broth was collected when the gas production reached its peak for 3 consecutive days.

[0103] (3) Repeat step (2), and regularly replace the fermented material in the fermenter with fresh substrate to maintain the microbi...

Embodiment 2

[0121] A method for rapid drying of dredged silt by microorganisms, using the following steps:

[0122] (1) Construct a drying pond with an internal size of 100m (length)×100m (width)×5m (depth) as a sludge storage yard, excavate 3m below the ground at a depth of 5m, pile up a cofferdam height of 2m, and have a total volume of about 50,000m 3 , 2 layers of sealing film are laid inside for anti-seepage treatment.

[0123] (2) Using water hyacinth, rice straw, and sheep manure with a dry mass ratio of 1.5:1:0.3 as raw materials, a large anaerobic fermentation tank is used as a container to domesticate gas-producing microorganisms. The domestication temperature is 30°C and the solid-to-liquid ratio is 1: 5. The daily gas production was detected, and the fermentation broth was collected when the gas production reached its peak for 3 consecutive days.

[0124] (3) Repeat step (2), and regularly replace the fermented material in the fermenter with fresh substrate to maintain the m...

Embodiment 3

[0142] A method for rapid drying of dredged silt by microorganisms, using the following steps:

[0143] (1) Construct a drying pond with an internal size of 100m (length)×100m (width)×5m (depth) as a sludge storage yard, excavate 3m below the ground at a depth of 5m, pile up a cofferdam height of 2m, and have a total volume of about 50,000m 3 , 2 layers of sealing film are laid inside for anti-seepage treatment.

[0144] (2) Use straw, rice straw, and chicken manure with a dry mass ratio of 1.1:0.8:0.2 as raw materials, and use a large anaerobic fermentation tank as a container to domesticate gas-producing microorganisms. The domestication temperature is 30°C and the solid-to-liquid ratio is 1:5. . The daily gas production was detected, and the fermentation broth was collected when the gas production reached its peak for 3 consecutive days.

[0145] (3) Repeat step (2), and regularly replace the fermented material in the fermenter with fresh substrate to maintain the microbi...

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Abstract

The invention relates to a method for promoting rapid drying of dredged silt by a microorganism. The method includes: taking straw and other organic matters as a substrate, conducting anaerobic fermentation and decomposition, burying the substrate in a silt storage yard, pre-burying a vacuum pumping pipe network system, inputting dredged silt, and then adding a flocculant and a coagulant aid to perform initial concentration, vacuum pumping, compression and other processes. The method for promoting rapid drying of dredged silt by a microorganism makes use of life activities of the microorganism and the produced gas to change the compact silt state formed during vacuum pumping, makes the silt become loose and porous, promotes flow of moisture, thereby improving the water pumping and drainage effect of vacuum preloading, and transforming the dredged silt from a fluid state to a plastic state or semi-solid state rapidly. Thus, the method realizes rapid dewatering and drying of dredged sludge, and has the characteristics of low cost and short construction period.

Description

technical field [0001] The invention belongs to the technical field of sludge drying treatment, and relates to a dredging sludge drying treatment method, in particular to a method for rapid drying of dredging sludge promoted by microorganisms. Background technique [0002] River and lake silt is usually formed by a mixture of clay, silt, organic matter and various minerals deposited at the bottom of the water body after a long period of physical, chemical, biological and water transport. The long-term release of pollutants to water bodies will also bring endogenous pollution to rivers, seas and lakes. my country has a vast territory, numerous rivers and lakes, and is in the stage of rapid urbanization development. A large amount of mud waste is produced every year. According to the survey, only 69.83% of the area of ​​Jiangsu Taihu Lake is covered by silt with a thickness of more than 0.1m. The thickest part The height is more than 5m, the total volume of silt is 1.912 billi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14C02F11/02
Inventor 司文攻吕志刚
Owner JIANGSU JIANGDA ECOLOGICAL SCI & TECHCO
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