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Immobilized catalyst for deep sludge treatment

A supported catalyst, advanced treatment technology, applied in physical/chemical process catalysts, dewatering/drying/concentrating sludge treatment, sludge oxidation treatment, etc. Realize problems such as oxidative degradation of sludge granule organic matter micellar structure membrane and bacterial cell membrane, and achieve the effect of improving oxidation effect and reducing cost

Inactive Publication Date: 2014-04-16
何小东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although ozone has a strong oxidizing ability, due to its existence in the form of gas, there are gas-solid, solid-liquid mass transfer problems and high selectivity defects in the oxidation process of sludge, which makes the utilization efficiency of ozone low. The oxidative degradation of the organic micellar structure film and bacterial cell film of sludge particles cannot be efficiently realized, which limits the application in the sludge treatment process

Method used

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  • Immobilized catalyst for deep sludge treatment
  • Immobilized catalyst for deep sludge treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The excess sludge with a concentration of 20100mg / L is introduced into the reaction tank, and the import volume is 74.3m 3 , then add the loaded catalyst in the reaction tank, (fly ash 58kg, diatomite 1.3kg, FeCl 3 6.0kg, titanium dioxide 0.70kg) after stirring for 5min, then pass through the gas phase mass transfer instrument, pass into ozone to carry out the oxidation reaction, add the coagulation agent (FeCl 3 15.0kg, PAC 15.0kg, CPAM 1.95kg), after 5mi, the supernatant in the reaction tank is discharged into the drainage system of the sewage treatment plant, and the sludge is discharged into the intermediate tank, which is lifted to the diaphragm filter press by the screw pump, and passed through the ordinary pressure Filter to obtain sludge with a moisture content of 49.8%.

Embodiment 2

[0035] The excess sludge with a concentration of 19800mg / L is introduced into the reaction tank, and the import volume is 78.3m 3 , then add the loaded catalyst in the reaction tank, (fly ash 62kg, diatomaceous earth 1.4kg, FeCl 3 6.3kg, titanium dioxide 0.70kg), after stirring for 5 minutes, pass through the gas phase mass transfer instrument, pass into ozone to carry out oxidation reaction, add coagulation agent (FeCl 3 16.0kg, PAC15.5.0kg, CPAM2.2kg), after 5mi, the supernatant in the reaction tank is discharged into the drainage system of the sewage treatment plant, and the sludge is discharged into the intermediate tank, which is lifted to the diaphragm filter press by the screw pump, and passed through the ordinary Press filtration to obtain sludge with a water content of 48.5%.

Embodiment 3

[0037] The excess sludge with a concentration of 20560mg / L is introduced into the reaction tank, and the import volume is 69.8m 3 , then add the loaded catalyst in the reaction tank, (fly ash 58kg, diatomite 1.3kg, FeCl 3 5.9kg, titanium dioxide 0.65kg), after stirring for 5 minutes, pass through the gas phase mass transfer instrument, pass into ozone to carry out oxidation reaction, add coagulation agent (FeCl 3 15.0kg, PAC14.6kg, CPAM1.87kg), after 5 minutes, discharge the supernatant in the reaction tank into the drainage system of the sewage treatment plant, discharge the sludge to the intermediate tank, lift it to the diaphragm filter press through the screw pump, and pass through the ordinary press Filter to obtain sludge with a moisture content of 49.6%.

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Abstract

The invention discloses an immobilized catalyst for deep sludge treatment. The immobilized catalyst consists of FeCl<3>, titanium dioxide, coal ash and kieselguhr. The invention further discloses a method for deep treatment on sludge by using the immobilized catalyst. Through the adoption of the method, the water content of the sludge can be controlled to be less than 50%, the cost is low, the effect is good, and the treated sludge can meet the national standard.

Description

technical field [0001] The invention relates to a supported catalyst, in particular to a supported catalyst for sludge advanced treatment. Background technique [0002] Sludge is organic matter, microbial micelle and other sedimentary substances produced in sewage treatment plants in the process of sewage treatment, as well as residues such as froth floating on the surface of sewage, which contains a large number of pathogenic bacteria, parasites, pathogenic microorganisms, dioxins and arsenic, Toxic heavy metals such as copper, mercury, and chromium, and even toxic and harmful substances that are difficult to degrade such as radionuclides. [0003] With the acceleration of my country's urbanization process, the rate of urban sewage treatment has increased year by year, and the sludge output of urban sewage treatment plants has increased sharply with an annual growth rate of more than 10%. In 2010, the national urban sewage treatment rate exceeded 50%, and the urban sewage ...

Claims

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Application Information

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IPC IPC(8): B01J27/135C02F11/06C02F11/12
Inventor 何小东
Owner 何小东
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