A kind of sludge deep dehydration composite conditioner and its application

A deep dehydration and conditioning agent technology, applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problems of blocked water filtration channels, low mechanical dehydration efficiency, easy compression deformation, etc., to improve compressibility and solve organic matter. Compressibility problem, effect of improving effective action

Active Publication Date: 2015-11-18
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the sludge is easily compressed and deformed under the action of high pressure, which will block the pores of the filter cake and block the water filtration channel in the later stage of filtration, resulting in low mechanical dehydration efficiency at present.

Method used

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  • A kind of sludge deep dehydration composite conditioner and its application

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Comparison scheme
Effect test

Embodiment 1

[0026] A kind of sludge deep dehydration composite conditioner, comprising the ferrous sulfate and potassium persulfate that mass ratio is 0.7, surfactant is cetyl trimethyl ammonium chloride, and skeleton construct is bentonite (fineness is 200 orders Sieve residue is less than 15%).

[0027] The application method of the sludge dehydration composite conditioner is as follows:

[0028] Take the remaining sludge from a certain urban sewage treatment plant, the water content is 97.0%, the sludge concentration is 34.5g / L, and the above chemicals are added to the sludge. The adding steps are as follows:

[0029] Add cetyltrimethylammonium chloride solution (concentration is 20%) in the surplus sludge of moisture content 97.0%, the dosage of cetyltrimethylammonium chloride is sludge dry basis 0.5%; and stir for 5 minutes, so that the surfactant is fully mixed with the sludge;

[0030] Dosing FeSO to sludge containing surfactant 4 (40% concentration), FeSO 4 The dosage is 2.5% ...

Embodiment 2

[0036] A composite conditioner for sludge deep dehydration, the conditioner is composed of the following components by weight:

[0037] Surfactant: cetyltrimethylammonium bromide 1;

[0038] Ferrous salt: FeSO 4 2.5;

[0039] Persulfate: K 2 S 2 o 8 3.0;

[0040] Skeleton construct: powdered diatomite (fineness is less than 15% on 200 mesh sieve) 5.0;

[0041] An application of a composite conditioner for deep dehydration of sludge. The composite conditioner for deep dewatering of sludge is used for deep dehydration of sludge, comprising the following steps:

[0042] (1) Add a surfactant to the sludge to be treated (digested sludge) with a water content of 96.5%, stir and mix evenly, wherein the dosage of the surfactant is 1% of the dry weight of the sludge;

[0043] (2) Continue to add ferrous salt and persulfate, stir and mix, and oxidation reaction occurs, wherein the dosage of ferrous salt is 2.5% of the dry weight of sludge, and the dosage of persulfate is 2% of th...

Embodiment 3

[0047] A composite conditioner for sludge deep dehydration, the conditioner is composed of the following components by weight:

[0048] Surfactant: alkyl glycoside 0.05;

[0049] Ferrous salt: FeCl 2 3.35;

[0050] Persulfate: (NH 4 ) 2 S 2 o 8 6;

[0051]Skeleton construct: powdered bentonite (fineness is less than 15% on 200 mesh sieve) 15.0;

[0052] An application of a composite conditioner for deep dehydration of sludge. The composite conditioner for deep dewatering of sludge is used for deep dehydration of sludge, comprising the following steps:

[0053] (1) Add a surfactant to the sludge to be treated with a water content of 97.5%, stir and mix evenly, wherein the dosage of the surfactant is 0.05% of the dry weight of the sludge;

[0054] (2) Continue to add ferrous salt and persulfate, stir and mix, and oxidation reaction occurs, wherein the dosage of ferrous salt is 3.35% of the dry weight of sludge, and the dosage of persulfate is 3.35% of the dry weight of s...

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Abstract

The invention relates to a sludge deep dehydration composite conditioner and its application, the conditioner comprises the following ingredients by weight: 0.05-2.0 parts of surfactant, 2.5-10.0 parts of ferrous salt, 3.0-12 parts of persulfate and 5.0-30.0 parts of frame construct body. The method comprises the following steps: adding a surfactant in sludge to be treated, stirring and uniformly mixing, wherein the adding amount of the surfactant accounts for 0.05-2.0% of dry weight of the sludge; continuously adding ferrous salt and persulfate, stirring and uniformly mixing to generate an oxidation reaction, wherein the adding amount of ferrous salt accounts for 2.5-10.0% of dry weight of the sludge, the adding amount of persulfate accounts for 3.0-12% of dry weight of the sludge; adding the frame construct body in the sludge, and stirring and uniformly mixing, wherein the adding amount of the frame construct body accounts for 5.0-30.0% of dry weight of the sludge. Compared with the prior art, the composite conditioner is capable of effectively destroying an extracellular polymer and microbial cells in the sludge, releasing the inner water of cells and EPS combination water, reducing the compressibility of an organic matter and greatly increasing the dehydration performance of the sludge.

Description

technical field [0001] The invention relates to a sludge conditioner and its application, in particular to a sludge deep dehydration composite conditioner and its application. Background technique [0002] With the continuous improvement of my country's investment in water treatment, the amount of sewage and wastewater treatment has increased year by year, and the amount of sludge produced as a by-product of biological treatment has also continued to increase. Usually, the moisture content of sludge is as high as 99%, resulting in huge sludge volume, strong fluidity, and difficult transportation and storage; before subsequent disposal of sludge, it usually needs to be conditioned and dehydrated. [0003] Due to the characteristics of high organic matter content, fine particles, strong hydrophilicity, large specific surface area, and strong colloidal structure in sludge, it is difficult to dewater sludge. Sludge dewatering often becomes a bottleneck problem in sludge treatmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/14
Inventor 陈秀荣江子建赵建国闫龙鲍征何怡萱王璐王寒可
Owner EAST CHINA UNIV OF SCI & TECH
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