Conditioner for sludge dehydration and conditioning method

A sludge dehydration and conditioning agent technology, applied in the field of environmental engineering, can solve the problems of secondary pollution, unsatisfactory dehydration effect, and high cost of conditioning agent, and achieve the effects of automatic processing, stable reaction, and short processing time

Active Publication Date: 2011-04-06
湖南多普生环境能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This disposal method not only occupies land resources, but also produces secondary pollution; very few use dehydration conditioners to treat sludge, and this treatment process can completely settle pollutant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The formula of the conditioning agent for sludge dehydration of the present invention comprises: ferric chloride accounting for 20% of the dry weight of the sludge, quicklime accounting for 20% of the dry weight of the sludge, coal gangue accounting for 15% of the dry weight of the sludge and 0.02% potassium permanganate fungicide based on the dry weight of the sludge.

[0023] Adopt the conditioning agent for sludge dehydration of the present invention to process the factory sludge with a moisture content of about 80% output from a sewage treatment plant, specifically comprising the following steps:

[0024] 1. Dilute the sludge with water according to the mass ratio of 1:1.1, and stir for 10 minutes to make the mud and water mix evenly;

[0025] 2. Add potassium permanganate bactericide accounting for 0.02% of the dry weight of the sludge, and stir for 2 minutes;

[0026] 3. Add ferric chloride solution (contained ferric chloride accounts for 20% of the dry weight of...

Embodiment 2

[0032] The formula of the conditioning agent for sludge dehydration of the present invention comprises: ferric chloride accounting for 10% of the dry weight of the sludge, quicklime accounting for 10% of the dry weight of the sludge, coal gangue accounting for 20% of the dry weight of the sludge and accounting for 10% of the dry weight of the sludge. 0.05% potassium permanganate fungicide based on the dry weight of the sludge.

[0033] Adopt the conditioning agent for sludge dehydration of the present invention to process the factory sludge with a moisture content of about 80% output from a sewage treatment plant, specifically comprising the following steps:

[0034] 1. Dilute the sludge with water according to the mass ratio of 1:1.1, and stir for 10 minutes to make the mud and water mix evenly;

[0035] 2. Add potassium permanganate bactericide accounting for 0.05% of the dry weight of the sludge, and stir for 2 minutes;

[0036] 3. Add ferric chloride solution (containing ...

Embodiment 3

[0042] The formula of the conditioning agent for sludge dehydration of the present invention comprises: ferric chloride accounting for 15% of the dry weight of the sludge, quicklime accounting for 15% of the dry weight of the sludge, coal gangue accounting for 10% of the dry weight of the sludge and accounting for 10% of the dry weight of the sludge. 0.025% potassium permanganate fungicide based on the dry weight of the sludge.

[0043] Adopt the conditioning agent for sludge dehydration of the present invention to process the factory sludge with a moisture content of about 80% output from a sewage treatment plant, specifically comprising the following steps:

[0044] 1. Dilute the sludge with water according to the mass ratio of 1:1.1, and stir for 10 minutes to make the mud and water mix evenly;

[0045] 2. Add potassium permanganate fungicide accounting for 0.025% of the dry weight of the sludge, and stir for 2 minutes;

[0046] 3. Add ferric chloride solution (containing ...

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PUM

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Abstract

The invention discloses a conditioner for sludge dehydration. Based on the dry weight of the sludge to be treated, the formula of the conditioner contains 10 to 20 percent of iron salt, 10 to 20 percent of burnt lime, 10 to 20 percent of coal gangue and 0.01 to 0.05 percent of potassium permanganate bactericide. The invention also discloses a conditioning method for the conditioner for the sludge dehydration, which comprises the following steps of: adding the potassium permanganate bactericide into the sludge to be treated at normal temperature under normal pressure, treating the sludge for at least 2 minutes with stirring, and then adding the iron salt to react for at least 2 minutes; and then adding the burnt lime to adjust the pH value to be neutral, reacting the mixture for at least 2 minutes, adding the coal gangue to react for at least 2 minutes, and finally performing pressure filtration. The invention has the advantages of low cost, wide raw material source, no toxicity, environmental friendliness, short treatment time, high sludge dehydration degree and the like.

Description

technical field [0001] The invention relates to the field of environmental engineering, in particular to a chemical reagent for sludge treatment and a conditioning method thereof. Background technique [0002] At present, the annual discharge of dry sludge from urban sewage treatment plants in my country is about 1.3 million tons, and it is also increasing at a rate of 10% every year. How to properly dispose of sludge from sewage treatment plants and how to solve a large amount of sewage sludge has become an important issue related to the safety of human ecological environment. [0003] The sludge discharged from the sewage treatment plant contains a large amount of organic matter, heavy metal ions, parasite eggs, pathogenic bacteria, etc., and its moisture content is unstable, generally around 80%. At present, the treatment of sludge mostly adopts simple disposal methods such as discarding and landfilling. This disposal method not only occupies land resources, but also pr...

Claims

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Application Information

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IPC IPC(8): C02F11/14
Inventor 何杰盛筱荃张玲吴铁勇夏安英
Owner 湖南多普生环境能源有限公司
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