Sludge drying agent and preparation method and using method thereof

A desiccant and sludge technology, applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problems of exceeding the standard, narrow application field of sludge, surrounding environmental pollution, etc., and achieve improved storage and transportation conditions, good sludge The effect of physical form and low running cost

Inactive Publication Date: 2010-09-22
赵润林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many sewage plants still transport the sludge at will, and simply landfill or pile it up. These wastes have high organic content and moisture content, and are easy to rot and smell, causing damage to the environment.
There are generally two existing methods for sludge treatment: one is composting, and the existing problems are: firstly, a large amount of harmful gas is released, causing surrounding environmental pollution; secondly, the dehydration cycle is long, and it usually takes about 45 days to reduce the water content to below 40%. ; Once again, the problem of frozen soil in winter cannot be solved; the last and most important thing is that the problem of heavy metal content exceeding the standard cannot be solved so far
The other is incineration. There are problems: first, the cost is high; second, the residue may cause secondary pollution to the environment
Most of the existing desiccants use cement or lime as the main raw material, which directly destroys the organic nutrients in the sludge, resulting in narrow application fields of the treated sludge.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The invention is composed of four non-toxic and harmless components, the amount of each component is measured by weight and fully mixed.

[0020] Wherein: plant ash accounts for 85 parts by weight, potassium humate accounts for 8 parts by weight, heavy magnesia accounts for 4 parts by weight, silicon dioxide accounts for 3 parts by weight, particle size is more than 100 orders, gets sewage treatment plant wet sludge 100KG ( Moisture content is greater than 85%), after fully mixing evenly according to the ratio of 10:1 (sludge:drying agent), under the condition of average temperature 12 degrees Celsius, after natural air drying for 5 days, the moisture content drops to 65%; Natural air drying for 10 After 15 days, the moisture content dropped to 50%; after 15 days of natural air drying, the moisture content dropped to 38%, and the pH value was 7.8, fully meeting the sludge disposal and drying requirements.

Embodiment 2

[0022] It is composed of four non-toxic and harmless ingredients. The amount of each component is measured by weight and fully mixed. Among them, plant ash accounts for 90 parts by weight, potassium humate accounts for 7 parts by weight, and heavy magnesium oxide accounts for 2 parts by weight. , silicon dioxide accounts for 1 weight part, and the particle size of this plant ash is more than 200 orders, gets the sewage treatment plant wet sludge 100KG (moisture content is greater than 85%), fully by the ratio of 10: 1.2 (sludge: drying agent) After mixing evenly, at an average temperature of 10 degrees Celsius, after 5 days of natural air drying, the moisture content will drop to 66%; after 10 days of natural air drying, the moisture content will drop to 53%; after 15 days of natural air drying, the moisture content will drop to 43%. The value is 8.1, which basically meets the requirements for sludge disposal and drying.

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Abstract

The invention relates to a sludge drying agent and a preparation method and a using method thereof. The sludge drying agent is applied to sludge produced in a sewage treating process and can recycle the treated sludge. The sludge drying agent mainly comprises the following components in part by weight: 85 to 93 parts of plant ash, 3 to 8 parts of potassium humate, 2 to 4 parts of heavy magnesium oxide and 1 to 3 parts of silicon dioxide. The sludge drying agent has the characteristics of water permeability, air permeability and very high water-retaining property, and can change sludge with very high water content (generally over 85 percent) into sludge with the water content of less than 45 percent in about 15 days so as to form a firmly-condensed and solidified soil structure.

Description

technical field [0001] The invention relates to a sludge drying agent, which is prepared from various natural minerals and is used for treating sludge generated in the process of sewage treatment and realizing reuse of the treated sludge. Background technique [0002] With the gradual increase of sewage treatment plants in my country and the development of sewage treatment technology, the sludge generated in the process of sewage treatment is also gradually increasing. At present, many sewage plants still transport the sludge at will, and simply landfill or pile it up. These wastes have high organic content and moisture content, are easy to rot and smell, and cause damage to the environment. There are generally two existing methods for sludge treatment: one is composting, and the existing problems are: firstly, a large amount of harmful gas is released, causing surrounding environmental pollution; secondly, the dehydration cycle is long, and it usually takes about 45 days to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
Inventor 赵润林
Owner 赵润林
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