Activated sludge stabilizing treatment method for sewage treatment

A technology for activated sludge and sewage treatment, applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc. Achieve the effect of eliminating hidden safety hazards, no secondary pollution, and easy operation

Inactive Publication Date: 2016-09-07
四川新开元环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the instability of the sludge pile with extremely high moisture content, in the long run, it will have a huge impact on the s

Method used

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  • Activated sludge stabilizing treatment method for sewage treatment
  • Activated sludge stabilizing treatment method for sewage treatment

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] A method for stabilizing activated sludge for sewage treatment, adding a curing agent to the dewatered sludge of a sewage treatment plant, stirring the reaction, and drying after the reaction, and then landfilling;

[0029] The curing agent is composed of the following components by weight: 15% fly ash, 35% quicklime, 25% plaster of paris, 5% ferric chloride, 5% sulfate and 0.5% cationic polyacrylamide.

Example Embodiment

[0030] Example 2

[0031] A method for stabilizing activated sludge for sewage treatment, adding a curing agent to the dewatered sludge of a sewage treatment plant, stirring the reaction, and drying after the reaction, and then landfilling;

[0032] The curing agent is composed of the following components by weight: 25% fly ash, 45% quicklime, 40% plaster of paris, 10% ferric chloride, 10% sulfate and 2% cationic polyacrylamide.

[0033] The effective content of calcium oxide in the quicklime is 75%.

Example Embodiment

[0034] Example 3

[0035] A method for stabilizing activated sludge for sewage treatment, adding a curing agent to the dewatered sludge of a sewage treatment plant, stirring the reaction, and drying after the reaction, and then landfilling;

[0036] The curing agent is composed of the following components by weight: 20% fly ash, 40% quicklime, 30% plaster of paris, 6% ferric chloride, 6% ferrous sulfate and 0.8% cationic polyacrylamide.

[0037] After the reaction is over, the sludge is made into a rectangular block solid of 40 cm×30 cm×30 cm, and then air-dried naturally for 7 days.

[0038] The effective content of calcium oxide in the quicklime is 70%.

[0039] The added amount of the curing agent is 5% of the mass of the sludge.

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Abstract

The invention provides an activated sludge stabilizing treatment method for sewage treatment. Curing agents are added into dewatered sludge in a sewage treatment plant, subjected to stirring reaction, dried in the air and buried after reaction. The curing agents comprise, by weight, 15-25% of coal ash, 35-45% of quicklime, 25-40% of calcined gypsum, 5-10% of ferric chloride, 5-10% of sulfate and 0.5-2% of cationic polyacrylamide. Equipment is universal, operation is simple and convenient, and secondary pollution is avoided.

Description

technical field [0001] The invention belongs to the technical field of sludge disposal, and in particular relates to a method for stabilizing activated sludge for sewage treatment. Background technique [0002] Activated sludge, a by-product of urban domestic sewage treatment, has a very high water content. Usually, the water content of the sludge after dehydration treatment is also between 80 and 85%. At present, there are four ways to deal with sludge in my country: land use, landfill, building material utilization and incineration. Their respective shortcomings are shown in Table 1: [0003] Table 1 Disadvantages of current sludge treatment methods [0004] [0005] Among them, landfill is the most common way to dispose of sludge. Due to the continuous increase in residential water consumption and industrial water consumption in recent years, the amount of sewage treatment has also increased. As a "derivative" of sewage treatment, my country's sludge production has b...

Claims

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Application Information

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IPC IPC(8): C02F11/00
CPCC02F11/008
Inventor 谢志建黄庆国
Owner 四川新开元环保工程有限公司
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