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Method of enhancing sludge dehydration performance

A sludge dehydration and performance technology, applied in chemical instruments and methods, water/sludge/sewage treatment, sludge treatment, etc., can solve the uncertain environmental and ecological risks, difficult microorganisms, degradation and utilization of dewatered sludge, etc. problem, to achieve the effect of important application value, low impact on environment and ecology

Inactive Publication Date: 2018-10-02
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in these methods, since these compounds will remain in the dewatered sludge and are difficult to be degraded and utilized by microorganisms in the environment, it will bring uncertain environmental and ecological risks to the subsequent utilization of dewatered sludge

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  • Method of enhancing sludge dehydration performance

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Embodiment 1

[0044] This embodiment provides a method for enhancing sludge dewatering performance, which specifically includes the following steps:

[0045] Adjusting the pH value: Weighing the wet sludge, adjusting the pH value of the wet sludge to 6.5; wherein, the specific steps for adjusting the pH value of the wet sludge are, first, using a pH meter to measure the pH value of the wet sludge; secondly According to the measurement results, add 0.1 mL of weak base with a concentration of 0.1 mol / L to the wet sludge. After stirring evenly, measure the pH value of the wet sludge. When the pH value of the wet sludge is 6.5, stop adding Weak base;

[0046] Enzyme pretreatment: first add 4g lysozyme to the wet sludge after pH adjustment, stir evenly, then shake and react at a temperature of 25°C and an oscillation frequency of 155rpm for 2h, then add 1g protease, stir evenly, Shake and react at 45°C and 155rpm for 2 hours. After the reaction is completed, the sludge specific resistance of th...

Embodiment 2

[0049] This embodiment provides a method for enhancing sludge dewatering performance, which specifically includes the following steps:

[0050] Adjusting the pH value: Weighing the wet sludge, adjusting the pH value of the wet sludge to 6.5; wherein, the specific steps for adjusting the pH value of the wet sludge are, first, using a pH meter to measure the pH value of the wet sludge; secondly According to the measurement results, add 0.1 mL of weak base with a concentration of 0.1 mol / L to the wet sludge. After stirring evenly, measure the pH value of the wet sludge. When the pH value of the wet sludge is 6.5, stop adding Weak base;

[0051] Enzyme pretreatment: first add 4g lysozyme to the wet sludge after pH adjustment, stir evenly, then shake and react at a temperature of 25°C and an oscillation frequency of 155rpm for 2h, then add 2g protease, stir evenly, Shake and react at 45°C and 155rpm for 2 hours. After the reaction is completed, the sludge specific resistance of th...

Embodiment 3

[0054] This embodiment provides a method for enhancing sludge dewatering performance, which specifically includes the following steps:

[0055] Adjusting the pH value: Weighing the wet sludge, adjusting the pH value of the wet sludge to 6.5; wherein, the specific steps for adjusting the pH value of the wet sludge are, first, using a pH meter to measure the pH value of the wet sludge; secondly According to the measurement results, add 0.1 mL of weak base with a concentration of 0.1 mol / L to the wet sludge. After stirring evenly, measure the pH value of the wet sludge. When the pH value of the wet sludge is 6.5, stop adding Weak base;

[0056] Enzyme pretreatment: first add 4g lysozyme to the wet sludge after pH adjustment, stir evenly, shake and react for 2 hours at a temperature of 25°C and an oscillation frequency of 155rpm, then add 3g protease, stir evenly, Shake the reaction at 45°C and 155rpm for 2 hours. After the reaction is completed, the sludge specific resistance of...

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Abstract

The invention relates to the technical field of sludge treatment and especially relates to a method of enhancing sludge dehydration performance. The method particularly includes steps of: regulating pH value of wet sludge to 6.0-7.0; adding lysozyme to the wet sludge for a reaction, then adding protease for a reaction; after the enzyme pretreatment, dehydrating the wet sludge to prepare sludge filter cake. The method improves total dehydration performance of the sludge; after the dehydration through the method, the dehydrated sludge is reduced in influence on environment and ecologic system.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a method for enhancing sludge dewatering performance. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of sewage treatment efficiency, the amount of sludge, a by-product of sewage treatment, has also increased sharply. As the final product of sewage treatment, sludge is difficult to meet the requirements of subsequent treatment such as composting, landfill, pyrolysis, incineration, etc. because of its water content can be as high as 95%-99%, and because of its high water content and large volume, it is also Increased the transportation cost and difficulty of sludge. In addition, sludge contains many harmful substances, such as heavy metals, pathogenic microorganisms, organic poisons, etc. If it is not properly treated and disposed of, it will also cause great harm to the environment and ecology. Therefore, ...

Claims

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Application Information

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IPC IPC(8): C02F11/12C02F11/02
CPCC02F11/02C02F11/121
Inventor 张作泰刘薇李顺
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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