Method for preparing porous titanate adsorbent through acetic acid activation on sludge

A technology of activated sludge and titanate, applied in chemical instruments and methods, sludge treatment, water/sludge/sewage treatment, etc., can solve problems such as sludge pollution, achieve environmental pollution, reduce synthesis costs, Good economic and social benefits

Inactive Publication Date: 2015-08-26
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing porous titanate adsorbent from acetic acid act

Method used

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  • Method for preparing porous titanate adsorbent through acetic acid activation on sludge
  • Method for preparing porous titanate adsorbent through acetic acid activation on sludge
  • Method for preparing porous titanate adsorbent through acetic acid activation on sludge

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A method for preparing a porous titanate adsorbent from acetic acid activated sludge, characterized in that it comprises the following process steps:

[0023] Take 1000g of sludge, adjust the moisture content to 85%, put it in a mashing homogenizer, add 800g of glacial acetic acid, mash and homogenize it for 30min at a stirring speed of 5000r / min, take it out, and put it in a 180W 40KHz ultrasonic oscillator Shake for 60 minutes, airtight, and soak at 50°C for 24 hours to obtain a homogeneous acetic acid activated sludge slurry; weigh 1000g of acetic acid activated sludge, add 800g of tetrabutyl titanate dropwise under continuous stirring conditions, add dropwise After that, continue to stir for 30 minutes, then add 238g of limestone powder, stir evenly, heat to 90°C and keep stirring for 30 minutes to react, evaporate the water and dry at 105°C to make titanium-calcium-sludge xerogel. In a box-type electric furnace, under the condition of 750 ° C, calcined in the air a...

Embodiment 2

[0026] A method for preparing a porous titanate adsorbent from acetic acid activated sludge, characterized in that it comprises the following process steps:

[0027] Take 1000g of newly discharged excess sludge, add 200mL of water, adjust the water content to 87.5%, put it in a mashing and homogenizing machine, add 700g of glacial acetic acid, and mash and homogenize it for 30min at a stirring speed of 5000r / min, take it out, put Oscillate in a 500W 40KHz ultrasonic oscillator for 60min, airtight, and soak at 60°C for 22h to obtain a homogeneous acetic acid-activated sludge slurry; weigh 1000g of acetic acid-activated sludge, and add 900g of it dropwise under continuous stirring After the addition of tetrabutyl titanate, continue to stir for 30 minutes, then add 268g of limestone powder, stir evenly, heat to 90°C, keep stirring and react for 30 minutes, evaporate the water and dry at 105°C to prepare titanium-calcium- Dry sludge gel was placed in a box-type electric furnace an...

Embodiment 3

[0030] A method for preparing a porous titanate adsorbent from acetic acid activated sludge, characterized in that it comprises the following process steps:

[0031] Take 1000g of newly discharged excess sludge, add 400mL of water, adjust the water content to 89.3%, put it in a mashing and homogenizing machine, add 600g of glacial acetic acid, and mash and homogenize it for 30min at a stirring speed of 5000r / min, take it out, and place Vibrate in a 300W 40KHz ultrasonic oscillator for 30min, airtight, and soak at 55°C for 20h to obtain a homogeneous acetic acid activated sludge slurry; weigh 1000g of acetic acid activated sludge, and add 1000g of it dropwise under continuous stirring After the addition of tetrabutyl titanate, continue to stir for 30 minutes, then add 298g of limestone powder, stir evenly, heat to 90°C, keep stirring and react for 30 minutes, evaporate the water and dry at 105°C to prepare titanium-calcium- Dry sludge gel was placed in a box-type electric furna...

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Abstract

The invention relates to a method for preparing a porous titanate adsorbent through acetic acid activation on sludge. The process steps comprise: taking a proper amount of sludge to prepare a mud slurry, placing into a mashing homogenizing machine, adding glacial acetic acid to the mud slurry, carrying out mashing homogenizing for 30-60 min, carrying out ultrasonic wave oscillation treatment for 20-60 min, sealing, carrying out thermal insulation dipping for 12-24 h at a temperature of 50-60 DEG C to obtain homogenized acetic acid activation sludge slurry, slowly adding tetrabutyl titanate to the acetic acid activation sludge slurry in a dropwise manner under a continuous stirring condition, continuously stirring for 20-30 min to obtain a titanium-containing sludge gel, taking an alkaline earth metal compound, adding to the titanium-containing sludge gel, uniformly stirring, heating to a temperature of 85-95 DEG C, carrying out a thermal insulation stirring reaction, evaporating, drying at a temperature of 105 DEG C to prepare a titanium-alkaline earth metal-sludge dry gel, and calcining the titanium-alkaline earth metal-sludge dry gel for 5-6 h at a temperature of 650-950 DEG C in an air atmosphere to obtain the finished product. According to the present invention, the sludge is directly utilized and the low price titanium tetrachloride is adopted to provide the titanium source to prepare the porous titanate heavy metal adsorption material with characteristics of low cost and high performance.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to the utilization of excess sludge in urban domestic sewage treatment plants and the preparation of water treatment materials, in particular to a method for preparing porous titanate adsorbents from acetic acid activated sludge. Background technique [0002] With the development of urbanization, the urban population has increased rapidly, and the discharge of urban domestic sewage is increasing. These domestic sewage have good biochemical properties, and various cities have built sewage treatment plants based on biochemical methods to achieve the standard discharge of sewage. However, during the process of sewage treatment in sewage treatment plants, a large amount of excess sludge will be produced. These sludges have high moisture content (75%-99%), high organic matter content, and are perishable. Sludge contains parasite eggs, pathogenic microorganisms and other pa...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/30C01G23/00C02F11/00
Inventor 张东张璐瑶王敏
Owner SHENYANG LIGONG UNIV
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