Unlock instant, AI-driven research and patent intelligence for your innovation.

Sludge dewatering conditioning agent and dehydrating method using the same

A sludge dehydration and conditioning agent technology, which is applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problems of complex preparation process and achieve the effect of simple process operation and stable performance

Inactive Publication Date: 2018-07-31
TONGFANG ENVIRONMENT
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The object of this method is concentrated sludge, and the composition of the composite filter aid includes as many as 9 kinds, and the preparation process is complicated.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sludge dewatering conditioning agent and dehydrating method using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The raw material components and percentage weight ratio of the sludge dehydration conditioner are: fly ash 17%, quicklime 83%.

[0036] The dehydration method is: add 6% sludge dehydration conditioner to the remaining sludge in the secondary settling tank and stir to make it evenly mixed with the sludge. Mud cake. The adjusted sludge specific resistance is 1.33×10 7 S 2 / g.

Embodiment 2

[0038] The raw material components and percentage weight ratio of the sludge dehydration conditioner are: fly ash 50%, quicklime 50%.

[0039] The dehydration method is as follows: add 10% inorganic composite sludge dehydration conditioner to the remaining sludge in the secondary sedimentation tank and stir to make it evenly mixed with the sludge, then enter the plate and frame filter press for dehydration through the sludge pump, and obtain a moisture content of 49.25 % of the mud cake. The adjusted sludge specific resistance is 5.7×10 6 S 2 / g.

Embodiment 3

[0041] The raw material components and percentage weight ratio of the sludge dehydration conditioner are: fly ash 37.5%, quicklime 62.5%.

[0042] The dehydration method is as follows: add 8% sludge dehydration conditioner to the remaining sludge in the secondary sedimentation tank and stir to make it evenly mixed with the sludge, then enter the sludge dehydrator through the sludge pump for dehydration, and obtain sludge with a moisture content of 52.4%. cake. The adjusted sludge specific resistance is 1.3×10 7 S 2 / g.

[0043] The invention prepares the conditioning agent with cheap raw materials quicklime and fly ash to condition the excess sludge in the secondary settling tank. Among them, the electrical neutralization and adsorption bridging effect of fly ash can destroy the stability of sludge colloidal particles, facilitate the aggregation of dispersed small particles, and improve dehydration performance. The quicklime in the sludge dehydration conditioner of the pr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a sludge dewatering conditioning agent and a dehydrating method using the same and relates to the technical field of urban domestic sewage and sludge. The sludge dewatering conditioning agent comprises 17-75% by weight of fly ash and the balance of quicklime with effective calcium oxide content of 50% to 70%. Compared with the existing sludge dewatering conditioning agent,the sludge dewatering conditioning agent has good sludge dewatering pretreatment effects, significantly reduces sludge moisture content and realizes a low cost.

Description

technical field [0001] The invention relates to the technical field of urban domestic sewage sludge, in particular to a sludge dehydration conditioner and a dehydration method thereof. Background technique [0002] Sludge is a by-product in the process of sewage treatment in sewage treatment plants. It generally refers to thick matter between liquid and solid. It can be transported by pumps, but it is difficult to separate solids and liquids by sedimentation. The sludge contains a large amount of water, which makes the sludge bulky. Taking a sewage treatment plant with a daily sewage treatment capacity of 200,000 tons as an example, the sludge produced every day can reach 1,000m 3 , if advanced treatment is carried out, the amount of sludge will increase by 0.5~1.0 times. With the gradual increase of sewage plants and the improvement of sewage treatment capacity, the sludge production is also gradually increasing. Taking my country as an example, the amount of sludge (dry ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F11/14
CPCC02F11/14
Inventor 朱宏刘春阳胡华
Owner TONGFANG ENVIRONMENT