Technique for conditioning sludge by using synergic action of Fenton reagent and polyacrylamide

A polyacrylamide and sludge conditioning technology, which is applied in dehydration/drying/concentrated sludge treatment, oxidation treatment of sludge, etc., can solve the problems of difficult operation control and large sludge treatment volume, and achieve easy operation, increase solid Liquid separation ratio, the effect of reducing the amount of sludge treatment

Inactive Publication Date: 2011-09-14
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

However, this method needs to acidify the sludge in advance, and the pretreatment process before slu

Method used

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  • Technique for conditioning sludge by using synergic action of Fenton reagent and polyacrylamide
  • Technique for conditioning sludge by using synergic action of Fenton reagent and polyacrylamide
  • Technique for conditioning sludge by using synergic action of Fenton reagent and polyacrylamide

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Embodiment approach

[0016] The sludge dewatering performance conditioning combination technology process described in the present invention makes full use of the respective advantages of Fenton reagent and CPAM, effectively oxidizes and degrades organic matter in sludge, releases bound water and water inside cells, and effectively decomposes sludge with small and dispersed particles Flocculate, enhance the dewatering performance of sludge, and increase the solid-liquid separation ratio in sludge dewatering. The present invention realizes sludge reduction, improves sludge dehydration performance, and provides better sludge form for subsequent sludge treatment and disposal under the optimal combined process conditions of combining the oxidation of Fenton's reagent and the flocculation of CPAM.

[0017] The operation process is shown in Figure 1. After the concentrated sludge is acidified, it is transported to the Fenton’s reagent oxidation tank. In the oxidation tank, the sludge reacts with the Fent...

Embodiment 1

[0019] The process of its operation is shown in Figure 1. After the sludge in the concentration tank is acidified by inorganic acid (pH=5), it is transported to the Fenton reagent oxidation tank (H 2 o 2 The dosage is 2g / L, FeSO 4 The dosage is 2.4g / L, and the reaction is 1 hour), the sludge in the oxidation tank reacts with Fenton's reagent under continuous stirring, the organic matter in the sludge is degraded, and the cell wall and extracellular polymers in the sludge (EPS) is dissolved and cracked, and a large amount of intracellular water and EPS bound water are released; when the Fenton reaction is complete, the sludge is flocculated and conditioned with CPAM (C8050 is added at 75mg / L, and the stirring method is 400rpm stirring Stirring at 60rpm for 5min after 30s), the dispersed fine particles in the sludge are adsorbed and flocculated to achieve good mud-water separation; then the sludge is transported to mechanical dehydration equipment for dehydration; finally, the ...

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Abstract

The invention discloses a 'technique for conditioning sludge by using the synergic action of Fenton reagent and polyacrylamide', and mainly aims to overcome the defects in sludge dehydration conditioning of urban sewage treatment plants at present. The invention provides a sludge conditioning combined technical process which can effectively degrade organic substances, realize sludge reduction, effectively release combined water and cell internal water difficult to be dehydrated in the sludge and improve the dehydration performance of the sludge. In the technique, the oxidizing action of the Fenton reagent and the strong flocculation of CPAM (cationic polyacrylamide) are fully combined and used to enhance the dehydration performance of the sludge and improve the solid-liquid separation ratio in sludge dehydration. Through conditioning, the water content of the sludge after centrifugal dehydration is reduced from 87.7 percent to 79.3 percent, and the mud cake output is reduced from 0.218t/m<3> to 0.128t/m<3>.

Description

technical field [0001] The invention belongs to the fields of environmental engineering and sludge treatment engineering, and focuses on a sludge conditioning technology through the synergistic effect of Fenton's reagent and polyacrylamide. Background technique [0002] With the increase of my country's sludge production year by year, sludge outlet has become a major problem faced by many cities. The moisture content of the sludge is extremely high, and the dehydration performance is poor. The difficulty and cost of subsequent sludge treatment and disposal have increased dramatically. At present, after mechanical dehydration, the moisture content of sludge cake usually does not meet the requirements of subsequent treatment and disposal, which becomes the main factor restricting sludge reduction, harmless and resourceful treatment and disposal. Therefore, to improve the sludge dewatering performance, Reducing the moisture content of sludge has become an important research to...

Claims

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Application Information

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IPC IPC(8): C02F11/14C02F11/06
Inventor 马俊伟曹芮王洪涛杨娅岳东北
Owner BEIJING NORMAL UNIVERSITY
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