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Compound type sludge dewatering conditioner and application method thereof

A technology of sludge dewatering and conditioning agent, which is applied in the direction of dewatering/drying/concentrating sludge treatment to achieve the effect of efficient dehydration, reducing affinity and promoting hydrolysis

Active Publication Date: 2013-05-22
SHENZHEN WATER GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems existing in the prior art, the inventor unexpectedly found that by the synergistic effect of the conditioner composed of ferric chloride, calcium oxide, magnesium oxide, surfactant and sulfuric acid, compared with a single conditioner, With obvious synergy, it can realize efficient dehydration of sludge. The conditioning process is simple and fast, and the amount of conditioner is small. Odor, no capacity increase problem, can achieve sludge reduction, good environmental benefits, and is conducive to the subsequent utilization of sludge resources, can be widely used in sewage and sludge treatment in chemical, municipal and other industries, especially for urban sewage Treatment of factory domestic sludge, especially primary sludge and secondary sludge with a water content of 97-98%

Method used

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  • Compound type sludge dewatering conditioner and application method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 Composite sludge dehydration conditioner.

[0023] The composite sludge dehydration conditioner includes the following components in parts by weight: 4 parts of ferric chloride, 5 parts of calcium oxide, 1 part of magnesium oxide, 1 part of sodium dodecylbenzoate, 3 parts of cetyltri Methylammonium chloride, 2 parts sulfuric acid.

Embodiment 2

[0024] Example 2 Composite sludge dehydration conditioner.

[0025] The composite sludge dehydration conditioner includes the following components in parts by weight: 5 parts of ferric chloride, 4 parts of calcium oxide, 2 parts of magnesium oxide, 0.5 parts of sodium dodecylbenzoate, 1.5 parts of cetyl tri methyl ammonium chloride, 1 part sulfuric acid.

Embodiment 3

[0026] Example 3 A composite sludge dehydration conditioner is used for sludge treatment.

[0027] Taking the primary sludge and activated sludge with a water content of 97% as the treatment object, add sodium dodecylbenzoate accounting for 2% by weight of the dry basis of the sludge and 1% by weight of cetyltrimethylammonium chloride, stirred, and the reaction was adjusted for 20 minutes; then add iron trichloride accounting for 5% by weight of sludge dry basis, and 4% by weight of iron trichloride accounting for sludge dry basis. Calcium, magnesium oxide accounting for 1% by weight of the dry basis of the sludge, stirring, and adjusting the reaction for 30 minutes; then adding sulfuric acid accounting for 2% by weight of the dry basis of the sludge, stirring, and adjusting the reaction for 10 minutes; The filter press is used for deep sludge dehydration, and the filter area of ​​the filter press is 1.8~3 m 2 , The effective volume is 0.054m3, the filtration pressure is ≤1...

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Abstract

The invention provides a compound type sludge dewatering conditioner which comprises the following components in parts by weight: 3-6 parts of ferric trichloride, 3-6 parts of calcium oxide, 1-2 parts of magnesium oxide, 1-4 parts of surfactant and 1-2 parts of sulfuric acid. The compound type sludge dewatering conditioner provided by the invention can realize efficient dewatering of sludge, the conditioning technology is simple and quick, the dosage of the conditioner is small, the moisture content of the dewatered sludge is reduced to below 45%, the pH value is 6-7, foul smell and the problem of capacity increase are avoided, and sludge reduction can be realized; and the compound type sludge dewatering conditioner has good environmental benefits, is favorable for subsequent sludge resource utilization, can be widely applied to the sewage and sludge treatment of the industries such as chemical industry, municipal affairs and the like, and is particularly suitable for treating the domestic sludge of urban sewage plant.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a composite sludge dehydration conditioner and an application method thereof. Background technique [0002] At present, the mechanical dehydration method commonly used in sewage treatment plants can reduce the water content of sludge to 75%-85%. "Notice" (Huanban [2010] No. 157) stipulates: "Where the sewage treatment plant transports the sludge to the factory for the purpose of storage (that is, no treatment and disposal), it must dehydrate the sludge to a moisture content of less than 50%." This poses a challenge to the traditional sludge dewatering technology that takes 80% water content as the factory standard. Seeking new sludge deep dehydration technology to achieve sludge volume reduction has become a bottleneck problem restricting the sewage treatment industry. [0003] Mechanical dehydration can only remove free water and part of the interstitial water existin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
Inventor 石广李鸿江曲志军尤作亮张金松
Owner SHENZHEN WATER GRP CO LTD
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