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A method of improving municipal sludge dewatering effect by using aluminum ash

A technology of municipal sludge and aluminum ash, applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc., can solve the problems of high energy consumption and high material consumption, and achieve low energy consumption and economy Good, simple method and effective effect

Active Publication Date: 2020-10-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the continuous optimization and development of the dehydration process, the types of sludge dewatering agents are increasing day by day, and the dehydration effect is gradually improving. However, looking at the above processes, there are disadvantages of high energy consumption and high material consumption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: utilize aluminum ash to improve the method for sludge dewatering effect, concrete operations are as follows:

[0022] (1) Weigh 0.1g of cetyltrimethylammonium bromide (relative molecular weight 364.45) and 0.1g of octadecyldimethylbenzyl ammonium chloride (relative molecular weight 424.15), add 100mL of deionized water, mix After homogenization, place the mixed solution in a shaker for 2 hours at normal temperature. After the reaction is completed, a homogeneous mixed solution of the two is obtained, which is stored in a brown reagent bottle for later use. Cetyltrimethylammonium bromide and octadecyl ammonium The total molar concentration of alkyl dimethyl benzyl ammonium chloride in the homogenate is 5mmol / L;

[0023] (2) Add 100mL homogeneous solution with a concentration of 5mmol / L to 10g of industrial aluminum ash, and react in a mixing and stirring reactor at 20°C for 20h to obtain a solid-liquid mixture, which is cleaned with distilled water and pump...

Embodiment 2

[0025] Embodiment 2: utilize aluminum ash to improve the method for sludge dewatering effect, concrete operation is as follows:

[0026](1) Weigh 0.1g of cetyltrimethylammonium bromide and 0.15g of octadecyldimethylbenzylammonium chloride, add 30mL of deionized water, mix well and put the mixture at room temperature, Vibrate in a shaker for 3 hours to obtain a homogeneous mixture, which is stored in a brown reagent bottle for later use, wherein the cetyltrimethylammonium bromide and octadecyldimethylbenzyl ammonium chloride in the homogeneous mixture The total molar concentration is 20mmol / L;

[0027] (2) Add 500mL of a homogenized solution with a concentration of 20mmol / L to 10g of industrial aluminum ash, and react in a mixing and stirring reactor at 25°C for 12h to obtain a solid-liquid mixture, and wash the solid-liquid mixture with distilled water at 0.04MPa Suction filtration, repeated 3 times, the filter residue is the aluminum ash treated with the homogenized solution...

Embodiment 3

[0029] Embodiment 3: utilize aluminum ash to improve the method for sludge dewatering effect, concrete operation is as follows:

[0030] (1) Weigh 0.1g of cetyltrimethylammonium bromide and 0.15g of octadecyldimethylbenzylammonium chloride, add 60mL of deionized water, mix well and put the mixture at room temperature, Put it in a shaker and vibrate for 4 hours. After the reaction is completed, a homogeneous mixture of the two is obtained, which is stored in a brown reagent bottle for later use, and the concentration of the homogeneous mixture is 10mmol / L;

[0031] (2) Add 900mL of a homogenized solution with a concentration of 10mmol / L to 10g of aluminum ash, and react in a mixing and stirring reactor at 30°C for 6h to obtain a solid-liquid mixture. Wash the solid-liquid mixture with distilled water at 0.07MPa Filtration, repeated 3 times, the filter residue is the aluminum ash treated with the homogenized solution, placed in a desiccator, dried at 110°C for 2 hours to obtain ...

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Abstract

The invention discloses a method for promoting a municipal sludge dewatering effect by utilizing aluminum ash. The method comprises the following steps: firstly, treating aluminum ash with a uniformly mixed solution of cetyl trimethyl ammonium bromide and octadecyl dimethyl benzyl ammonium chloride, cleaning, filtering and then drying, thereby acquiring modified aluminum ash; putting the modified aluminum ash into municipal sludge, stirring and precipitating, thereby separating solid particles from water in the municipal sludge; filtering the precipitated solid and liquid materials under a certain pressure, thereby acquiring a sludge cake in low moisture content. Compared with the moisture content of sludge acquired according to a common dewatering technology at present, the moisture content of sludge according to the technology is greatly reduced to be below 50%; and meanwhile, the sludge specific resistance of sludge treated with the modified aluminum ash is obviously reduced, so that the filtering performance of sludge is greatly promoted; the technology is low in cost, less in energy consumption, simple and feasible in process flow, wide in market prospect and free from environmental pollution.

Description

technical field [0001] The invention specifically relates to a method for improving the dewatering effect of municipal sludge by using aluminum ash, which belongs to the field of resource application of aluminum ash and also belongs to the technical field of sludge deep dehydration. Background technique [0002] Aluminum ash is a kind of industrial waste residue with large output and serious pollution. It mainly comes from aluminum smelting enterprises such as electrolytic aluminum factories, aluminum profile factories, and foundry aluminum alloy factories. According to statistics, for every 1000 tons of aluminum produced, about 25 tons of aluminum ash will be produced. The massive accumulation of aluminum ash not only causes waste of resources, but also causes environmental pollution. The main component of aluminum ash is SiO 2 and Al 2 o 3 , SiO 2 The content of Al is generally 5% to 20%, Al 2 o 3 The content is generally 43% to 75%. At present, domestic and foreig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/143
CPCC02F11/14
Inventor 马丽萍戴取秀宁平任南琪瞿广飞郭致蓥
Owner KUNMING UNIV OF SCI & TECH
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