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Sludge dehydration conditioning method based on protein denaturant

A protein denaturant, protein denaturation technology, applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc. The effect of promoting coagulation, effectively improving sludge dewatering performance, and mild reaction conditions

Active Publication Date: 2020-12-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a sludge dehydration conditioning method based on protein denaturants, which is used to solve the problems of poor sludge dehydration performance and large dosage of dehydration agents in the prior art

Method used

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  • Sludge dehydration conditioning method based on protein denaturant

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Embodiment 1

[0028] 1. Protein denaturants are used in sludge dehydration conditioning:

[0029] In this embodiment, the sludge in a certain urban sewage treatment plant in Shanghai is used as the treatment object, and a protein denaturant-based sludge dehydration conditioning method is used to treat it. The method includes the following steps:

[0030] 1) mixing tannin extract, furfural, and glutaraldehyde in a mass ratio of 5:5:1 to prepare a protein denaturant;

[0031] 2) Add a protein denaturant to the above sludge, the amount of which is 2% of the dry weight of the sludge, and then fully react for 30 minutes under the condition of 300rpm magnetic stirring, and reduce the hydrophilicity of the extracellular protein through protein complexation and denaturation , reduce the overall water holding capacity of sludge flocs, and obtain pretreated sludge;

[0032] 3) Add a protein emulsifying coagulant (polyether amine) to the pretreated sludge in an amount of 0.1% of the dry weight of the...

Embodiment 2

[0038] 1. Protein denaturants are used in sludge dehydration conditioning:

[0039] In this embodiment, the unconditioned raw sludge in Example 1 is used as the treatment object, and it is treated with a protein denaturant-based sludge dehydration conditioning method, which includes the following steps:

[0040] 1) mixing tannin extract, furfural, and glutaraldehyde with a mass ratio of 10:10:1 to prepare a protein denaturant;

[0041]2) Add a protein denaturant to the above sludge, the amount of which is 5% of the dry weight of the sludge, and then fully react for 10 minutes under the condition of 100rpm magnetic stirring, and reduce the hydrophilicity of the extracellular protein through protein complexation and denaturation , reduce the overall water holding capacity of sludge flocs, and obtain pretreated sludge;

[0042] 3) Add a protein emulsifying coagulant (polyetheramine) to the pretreated sludge, the amount of which is 0.3% of the dry weight of the sludge, and then s...

Embodiment 3

[0046] 1. Protein denaturants are used in sludge dehydration conditioning:

[0047] In this embodiment, the unconditioned raw sludge in Example 1 is used as the treatment object, and it is treated with a protein denaturant-based sludge dehydration conditioning method, which includes the following steps:

[0048] 1) mixing tannin extract, furfural, and glutaraldehyde with a mass ratio of 7.5:7.5:2 to prepare a protein denaturant;

[0049] 2) Add a protein denaturant to the above sludge, the amount of which is 3.5% of the dry weight of the sludge, and then fully react for 20 minutes under the condition of 200rpm magnetic stirring, and reduce the hydrophilicity of the extracellular protein through protein complexation and denaturation , reduce the overall water holding capacity of sludge flocs, and obtain pretreated sludge;

[0050] 3) Add a protein emulsifying coagulant (polyetheramine) to the pretreated sludge, the amount of which is 0.2% of the dry weight of the sludge, and t...

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Abstract

The invention relates to a sludge dehydration conditioning method based on a protein denaturant, which is characterized by comprising the following steps: uniformly mixing sludge to be conditioned with the protein denaturant, carrying out protein denaturation reaction, adding a protein emulsifying coagulant, and quickly stirring to obtain a sludge conditioning solution; coagulation and aggregationof water-binding extracellular protein in the sludge are further promoted in an assisted manner, and the dispersion water-holding performance of the protein is reduced. Compared with the prior art, the method has the remarkable advantages of low dosage, mild reaction conditions, no toxicity or harm, no influence on the sludge incineration heat value and the like, provides a new technical way forenvironment-friendly sludge dehydration conditioning, and shows wide market application prospects and important social and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and relates to a sludge dehydration conditioning method based on a protein denaturant. Background technique [0002] Sludge is an inevitable by-product of sewage biological treatment. It carries a large number of pathogenic bacteria, heavy metals and toxic organic pollutants. If it is not disposed of properly, it will cause serious environmental pollution risks. Since the 1990s, with the rapid development of my country's economic construction and urbanization level, the amount of sewage production has increased day by day, and the corresponding sewage collection and treatment rate has also gradually increased, resulting in a large amount of sludge. According to the "China Urban and Rural Construction Statistical Yearbook" issued by the Ministry of Housing and Urban-Rural Development in 2020, there are 4,119 urban sewage treatment plants in my country, with a designed treatment cap...

Claims

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Application Information

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IPC IPC(8): C02F11/147
CPCC02F11/147
Inventor 戴晓虎武博然柴晓利杨殿海
Owner TONGJI UNIV
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