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Sludge concentration dehydrating agent and preparation method thereof

A technology for sludge concentration and dehydration agent, which is applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc. The problem of high moisture content in the filter cake achieves the effect of convenient subsequent treatment, low cost and simple preparation method

Pending Publication Date: 2019-08-06
JILIN JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the increase in the amount of sludge produced by sewage and sludge treatment and the deterioration of sludge characteristics, cationic sludge dewatering agents have problems in the treatment of wastewater rich in organic matter, such as high moisture content of dehydrated filter cakes, weak floc strength, It is difficult to obtain sufficient dewatering effect due to poor peeling performance of dewatered sludge cake

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Raw material ratio

[0027] 30wt% corn stalks, 5wt% volcanic rock, 10wt% wood powder, 12wt% gelatin, 7wt% humic acid, 8wt% cyclodextrin, 15wt% diatomaceous earth, and the balance is water.

[0028] 2. Preparation process

[0029] (1) Dry and pulverize the crop stalks, pass through an 80-mesh sieve, place the sieved crop stalk powder and wood powder in a reaction vessel, add toluene to obtain a mixed solution I, place the reaction vessel in a water bath, and heat at 50°C Soak for 6 hours;

[0030] (2) dissolving maleic anhydride in acetone to obtain mixed solution II;

[0031] (3) Add mixed solution II to mixed solution I, heat to boiling in a water bath at 80°C, react for 2 hours, cool to room temperature, filter, wash the filter residue with acetone, and freeze-dry to obtain maleic anhydride-modified crop straw and wood pink;

[0032] (4) Add maleic anhydride-modified crop straw and wood powder into the reaction vessel, then add water, nitrogen gas, stir for 10 ...

Embodiment 2

[0035] 1. Raw material ratio

[0036] 40wt% corn stalks, 8wt% volcanic rock, 12wt% wood powder, 8wt% gelatin, 5wt% humic acid, 6wt% cyclodextrin, 13wt% diatomaceous earth, and the balance is water.

[0037] 2. Preparation process

[0038] (1) Dry and pulverize the crop stalks, pass through an 80-mesh sieve, place the sieved crop stalk powder and wood powder in a reaction vessel, add toluene to obtain a mixed solution I, place the reaction vessel in a water bath, and heat at 50°C Soak for 6 hours;

[0039] (2) dissolving maleic anhydride in acetone to obtain mixed solution II;

[0040] (3) Add mixed solution II to mixed solution I, heat to boiling in a water bath at 80°C, react for 2 hours, cool to room temperature, filter, wash the filter residue with acetone, and freeze-dry to obtain maleic anhydride-modified crop straw and wood pink;

[0041](4) Add maleic anhydride-modified crop straw and wood powder into the reaction vessel, then add water, nitrogen gas, stir for 10 mi...

Embodiment 3

[0044] 1. Raw material ratio

[0045] 50wt% corn stalks, 10wt% volcanic rock, 15wt% wood powder, 5wt% gelatin, 3wt% humic acid, 2wt% cyclodextrin, 10wt% diatomaceous earth, and the balance is water.

[0046] 2. Preparation process

[0047] (1) Dry and pulverize the crop stalks, pass through an 80-mesh sieve, place the sieved crop stalk powder and wood powder in a reaction vessel, add toluene to obtain a mixed solution I, place the reaction vessel in a water bath, and heat at 50°C Soak for 6 hours;

[0048] (2) dissolving maleic anhydride in acetone to obtain mixed solution II;

[0049] (3) Add mixed solution II to mixed solution I, heat to boiling in a water bath at 80°C, react for 3 hours, cool to room temperature, filter, wash the filter residue with acetone, and freeze-dry to obtain maleic anhydride-modified crop straw and wood pink;

[0050] (4) Add maleic anhydride-modified crop straw and wood powder into the reaction vessel, then add water, nitrogen gas, stir for 10 ...

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Abstract

The invention discloses a sludge concentration dehydrating agent and a preparation method thereof, and belonging to the technical field of sludge treatment. The preparation method comprises the following steps of: modifying crop straw and wood powder, mixing cyclodextrin and diatomite with the modified crop straw and wood powder, adding water, boiling in boiling water for 10-15 min, extracting, collecting an extracted solid product, adding humic acid and volcanic rocks, magnetically stirring for 15-20 min, adding gelatin, heating, evaporating to obtain the sludge concentration dehydrating agent. The dosage of the sludge concentration dehydrating agent is only 0.02-0.03%, the deep dehydration of sludge can be realized while the sludge dehydration time is reduced, one ton of sludge with a water content of 60-99% can be directly dehydrated within 30 minutes to the water content reaching 20-35%, and the subsequent treatment of the sludge can be greatly facilitated.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge thickening and dehydrating agent and a preparation method thereof. Background technique [0002] As a product of the sewage treatment process, sludge has a very complex composition, including a large number of solid particles intercepted in the process of industrial wastewater or domestic sewage treatment, such as sediment, animal and plant residues, etc., and a large number of bacterial gels composed of microbial groups. Groups and their adsorbed organic matter, as well as other toxic and harmful substances such as heavy metal elements, parasite eggs, and a small amount of pathogenic microorganisms. If the sludge enters the natural environment directly without effective treatment, it will cause serious pollution to the natural environment. On the other hand, since the sludge contains a large amount of water, the water content is generally as high as 97.5% to 99.5%, resu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/148
CPCC02F11/148
Inventor 陆海王建辉闫博佼邓欢冯伟豪李雪琪
Owner JILIN JIANZHU UNIVERSITY
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