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Sludge dewatering agent and dewatering method thereof

A sludge dewatering agent and sludge technology, which are applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve the problems of reduced organic components of sludge, difficult disposal of sewage sludge, unfavorable resource utilization, etc., and achieve fast dehydration speed. , Good operating environment for workers, good dehydration effect

Inactive Publication Date: 2008-01-09
GUANGZHOU PUDE ENVIRONMENTAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the sewage sludge dewatering agent is mainly made of alkaline chemical raw materials and neutral salts. After conditioning, the dehydration performance of sewage sludge can be changed. However, since the sludge after conditioning is in an alkaline state, the sludge A large amount of organic matter in the sludge is lost, which reduces the organic content of the dehydrated sludge, which is not conducive to resource utilization, and makes the disposal of the treated sewage sludge a big problem.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take urban sewage sludge with a water content of 81.6% and put it into a square tank, first add 60% water, and stir for 3 minutes; then add 3% ferric sulfate, and stir for 4 minutes; then add 5% dodecylbenzene Sodium sulfonate, fully stirred and reacted for 5 minutes; then added 4% industrial fine sand, fully stirred and reacted for 3 minutes; then the conditioned sludge was sucked into the plate and frame filter press through the variable plunger pump, and the pressure was about 1.2MPa The pressure was maintained for 85 minutes, and then the pressure was released and the material was discharged. The moisture content of the sludge was 51.3%.

Embodiment 2

[0021] Take municipal sewage sludge with water content of 80.8% and put it into a square tank, first add 62% water, stir for 1 minute; then add 2% ferric chloride, stir for 3 minutes; then add 3% linear alkylbenzene Sodium sulfonate, fully stirred and reacted for 2 minutes; then add 5% of the third-grade ash, fully stirred and reacted for 2 minutes; then inject the adjusted sludge into the belt filter press through the plunger pump, at a pressure of about 1.1MPa The pressure was maintained for 90 minutes, and then the pressure was released and the material was discharged. The moisture content of the sludge was 53.5%.

Embodiment 3

[0023] Take municipal sewage sludge with a water content of 79.29% and put it into a square tank, first add 66% of water, and fully stir for 1 minute; then add 1.5% of a mixture of ferric sulfate and polyferric sulfate, and fully stir for 2 minutes; then add 3.5% of Mixture of sodium dodecylbenzene sulfonate and sodium linear alkylbenzene sulfonate, fully stirred and reacted for 3 minutes; then add 4% of the mixture of industrial fine sand and tertiary ash, fully stirred and reacted for 2 minutes; then passed The adjusted sludge is injected into the screw press by the plunger pump, and the pressure is maintained at a pressure of about 1.2MPa for 80 minutes, and then the pressure is released, and the moisture content of the sludge is 52.9%.

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PUM

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Abstract

This invention discloses a waste-sludge dewatering agent. It contains (by the weight of the water content in waste-sludge being treated) of: iron salt 1-3%; ion-dispersing agent with surface-activity 1-5%; granular matter 3-6% and the rest water 60-70%. This inventive dewatering of waste-sludge method is also a waste-sludge temperament method, comprises procedures of: adding water into said sludge, agitating for 1-3 minutes; adding iron salt and reacting, during agitating, for 2-6 minutes; adding ion-dispering agent and reacting, during agitating, for 2-8 minutes; adding granular matter and reacting, during agitating, for 2-6 minutes. This inventive method for dewatering of waste-sludge has advantages of: fast dewatering, excellent results and no reducing of organic matters during this dewatering process.

Description

technical field [0001] The invention belongs to sludge treatment technology, in particular to a sludge dewatering agent and a sludge dehydration method. Background technique [0002] Sludge from urban sewage plants refers to the solid, semi-solid and liquid wastes produced by sewage treatment. It contains a large amount of organic matter, heavy metals, pathogenic bacteria and pathogenic bacteria, etc. If it is discharged without treatment, it will cause serious pollution to the environment. . The amount of municipal sewage sludge produced is huge, and the water content is about 80%. Therefore, dehydration has become a key link in order to achieve the purpose of reducing the amount of sewage sludge. [0003] At present, there are two methods for the reduction and dehydration of sewage sludge, one is to reduce the amount of organic matter (digestion, incineration), and the other is to reduce the water content of sludge (concentration, mechanical dehydration, drying). At pres...

Claims

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Application Information

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IPC IPC(8): C02F11/14
Inventor 钟环声龙广生杨海英罗卫员
Owner GUANGZHOU PUDE ENVIRONMENTAL EQUIP
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