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Method for conditioning excess sludge through cooperation of aluminum sludge and advanced oxidation

A technology of excess sludge and advanced oxidation, which is applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc. Improved compressibility, enhanced strength effects

Pending Publication Date: 2022-05-06
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the current problems of difficult dehydration and high cost of excess sludge, the present invention provides a method for conditioning excess sludge through synergistic advanced oxidation of aluminum sludge, which alleviates the problem of sludge disposal and improves the dehydration performance of excess sludge

Method used

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  • Method for conditioning excess sludge through cooperation of aluminum sludge and advanced oxidation
  • Method for conditioning excess sludge through cooperation of aluminum sludge and advanced oxidation
  • Method for conditioning excess sludge through cooperation of aluminum sludge and advanced oxidation

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Example 1 Effect of Adding Aluminum Sludge on Sludge Dewatering Performance

[0020] The aluminum sludge was taken from the coagulated sludge of the central high-density sedimentation tank of Quehua Water Plant in Jinan City, with an aluminum content of 7.5 mg / g dry sludge; the remaining sludge was taken from the sedimentation unit of the biochemical treatment unit of the reclaimed water treatment station of Jinan University The remaining sludge in the pool; take 500 mL of the remaining sludge to be treated, and add Fe according to the amount of dry sludge 2+ (dosing amount is 20 mg / g) and SPC (dosing amount is 50 mg / g, 100 mg / g, 150 mg / g, 200 mg / g), and then add aluminum sludge (based on aluminum content , the dosage was 6 mg / g), and the one without adding aluminum sludge was used as the control.

[0021] After adding all the materials, the reaction system was obtained, and then placed in a six-connected mixer (Meiyu MY 3000-6F) for conditioning. The setting was first...

Embodiment 2

[0031] Example 2 Effects of Different Sampling Orders on Sludge Dewatering Performance

[0032] Carry out according to the sample amount of each material among the embodiment 1, difference is to be divided into following processing modes:

[0033] (1) Adding at the same time: Add all the materials to obtain the reaction system, and then put it in a six-way mixer for conditioning. Set it to stir quickly at 200 rpm for 2 minutes, and then stir slowly at 50 rpm for 30 minutes;

[0034] (2) Add Fe first 2+ / SPC: Fe 2+ / SPC After adding the remaining sludge first, put it in a six-way mixer for conditioning, set it to stir quickly at 200 rpm for 2 minutes, then add aluminum sludge and stir slowly at 50 rpm for 30 minutes;

[0035] (3) Add aluminum sludge first: After adding aluminum sludge to the remaining sludge, put it in a six-way mixer for conditioning, set it to stir at 200 rpm for 2 minutes, and then add Fe 2+ / SPC50 rpm and stir slowly for 30 min.

[0036] See image 3 :...

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Abstract

The invention belongs to the technical field of solid waste treatment, and provides a method for conditioning excess sludge through cooperation of aluminum sludge and advanced oxidation, and the method comprises the following steps: adding the aluminum sludge and Fe < 2 + > / SPC into the excess sludge, and stirring and mixing; the addition amount of aluminum in the aluminum sludge is 6 mg / g; the addition amount of the Fe < 2 + > is 20 mg / g, and the addition amount of the SPC is 50-200 mg / g. The method is simple and easy to implement, the water plant aluminum sludge is combined with the advanced oxidation technology to condition the residual sludge of the sewage plant, on one hand, the water plant aluminum sludge is subjected to resource utilization, the sludge treatment problem of a water supply plant is solved, meanwhile, the dehydration performance of the residual sludge of the sewage plant is improved, and the dehydration performance is improved while the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and in particular relates to a method for conditioning excess sludge by synergistic advanced oxidation of aluminum sludge. Background technique [0002] In recent years, with the gradual strengthening of environmental protection awareness, many sewage treatment plants have been built and rebuilt in my country, and the output of sludge has increased year by year, but the sludge treatment capacity is still poor. Finding a new comprehensive disposal method that can not only reduce the moisture content of sludge, improve dewatering performance, but also reduce the operating cost of sludge disposal is an urgent problem in sludge disposal. [0003] The remaining sludge of the sewage plant contains a large amount of water, organic matter such as extracellular polymers, humic acid, and other inorganic particles such as heavy metals and silicates. According to the combination of moisture con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/143
CPCC02F11/143
Inventor 王乃燃许伟颖魏东袁瑞王涵孟琳琳于晓斌房亚南
Owner UNIV OF JINAN
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