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TiO2-carrying photoelectric catalyst for photoelectrocatalytic advanced treatment on sludge and method and device for TiO2-carrying photoelectric catalyst-based photoelectrocatalytic advanced treatment on sludge

A technology of advanced treatment and photoelectric catalysis, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of restricting direct landfill of sludge and comprehensive utilization of resources , the moisture content of sludge cannot be reduced, and the surrounding ecological environment is affected, so as to facilitate the application of resources, improve the oxidation effect, and save the treatment cost.

Active Publication Date: 2013-04-17
JIANGSU ZHAOSHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inability of the traditional process of sludge treatment in sewage plants to effectively break down the outer polymer of sludge, it is difficult to remove the water absorbed by the sludge micellar structure and the cell water of bacterial clusters, resulting in the sludge moisture content remaining after treatment in sewage plants. As high as 78-83%, resulting in high transportation costs for sludge landfill, huge land occupation rate for landfill, and it is very easy to cause secondary pollution of landfill due to sludge remelting and seepage, affecting the surrounding ecological environment
The moisture content of sludge cannot be reduced below 60%, which limits the direct landfill and resource utilization of sludge, which is a technical bottleneck in the current sludge treatment and disposal

Method used

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  • TiO2-carrying photoelectric catalyst for photoelectrocatalytic advanced treatment on sludge and method and device for TiO2-carrying photoelectric catalyst-based photoelectrocatalytic advanced treatment on sludge

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The excess sludge with a concentration of 15100mg / L and an organic matter content of 32% is introduced into the reactor, and the amount of introduction is 94.3m 3 , and then add loaded TiO in the reactor 2 Photoelectric catalyst (configured according to 0.75 kg of core catalyst and 74.05 kg of carrier), after stirring for 5 minutes, turn on the ultraviolet generator 15 to irradiate the sludge in the reactor, and at the same time introduce high-energy electrons through the aeration pipeline through the high-energy electron generator 3 The reaction was carried out while stirring for 50 min. Then add composite coagulant (PAC14.0kg, PAM1.89kg) through the dispensing tank, and after 5 minutes, discharge the supernatant in the reaction kettle into the drainage system of the sewage treatment plant, discharge the sludge to the intermediate tank, and lift it to the diaphragm through the screw pump Filter press, through ordinary press filtration, sludge with a moisture content o...

Embodiment 2

[0048] The excess sludge with a concentration of 14800mg / L and an organic matter content of 35% is introduced into the reactor, and the amount of introduction is 95.6m 3 , and then add loaded TiO in the reactor 2 Photocatalyst (configured according to 0.98 kg of core catalyst and 64.02 kg of carrier), after stirring for 5 minutes, turn on the ultraviolet generator 15 to irradiate the sludge in the reactor, and at the same time introduce high-energy electrons through the aeration pipeline through the high-energy electron generator 3 The reaction was carried out while stirring for 60 minutes. Then add composite coagulant (PAC16.00kg, PAM1.89kg) through the dispensing tank, and after 5 minutes, discharge the supernatant in the reaction kettle into the drainage system of the sewage treatment plant, discharge the sludge to the intermediate tank, and lift it to the diaphragm through the screw pump Filter press, through ordinary press filtration, sludge with a moisture content of 48...

Embodiment 3

[0050] The remaining sludge with a concentration of 16560mg / L and an organic matter content of 20% is introduced into the reactor, and the amount of introduction is 96.8m 3 , and then add loaded TiO in the reactor 2 Photoelectric catalyst (configured according to 0.26 kg of core catalyst and 51.54 kg of carrier), after stirring for 5 minutes, turn on the ultraviolet generator 15 to irradiate the sludge in the reactor, and at the same time introduce high-energy electrons through the aeration pipeline through the high-energy electron generator 3 The reaction was carried out while stirring for 30 min. Then add composite coagulant (PAC16.86kg, PAM2.18kg) through the dispensing tank, and after 5 minutes, discharge the supernatant in the reaction kettle into the drainage system of the sewage treatment plant, discharge the sludge to the intermediate tank, and lift it to the diaphragm through the screw pump Filter press, through ordinary press filtration, sludge with a moisture conte...

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Abstract

The invention discloses a TiO2-carrying photoelectric catalyst for photoelectrocatalytic advanced treatment on sludge, and a method and a device for TiO2-carrying photoelectric catalyst-based photoelectrocatalytic advanced treatment on sludge. The method provided by the invention comprises the following steps of 1, adding the TiO2-carrying photoelectric catalyst for photoelectrocatalytic advancedtreatment on sludge into sludge, 2, carrying out irradiation by an ultraviolet ray generator located at an upper part of a reactor, and feeding high-energy electrons produced by an air-carried high-energy electron generator into the sludge by an aeration pipe located a lower part of the reactor, 3, adding a composite coagulation agent into the sludge obtained by the step 2 and carrying out flocculation, and 4, carrying out press filtration of the sludge by a pressure filter. The TiO2-carrying photoelectric catalyst, the device and the method provided by the invention solve the technical problem that the sludge normal-temperature treatment technology cannot remove water absorbed by organic matter-containing sludge, realize that the content of water in residual sludge is reduced to the content below 50% by a single step under the conditions of a normal temperature and normal pressure, realize sterilization, deodorization and solidification of toxic heavy metal ions simultaneously, and realize a large sludge decrement, a low treatment cost and good treatment effects. Sludge treated by the TiO2-carrying photoelectric catalyst, the method and the device reaches the latest standard published by the state environmental protection department and is convenient for follow-up recycling application.

Description

technical field [0001] The invention relates to the field of sludge treatment of environmental protection technology, in particular to a TiO2-loaded 2 Catalyst, device and method for photoelectric catalytic advanced treatment of sludge. Background technique [0002] Municipal sludge is organic matter, microbial micelle and other sediments produced in the process of sewage treatment, as well as residues such as floating foam on the surface of sewage, which contains a large number of pathogenic bacteria, parasites, pathogenic microorganisms, dioxins, arsenic, copper, and mercury , chromium and other toxic heavy metals. Sludge particles mainly exist in the form of extracellular polymers (EPS), with complex components, usually containing proteins, polysaccharides, humic-like substances, uronic acid, lipids (1ipid) and DNA etc. Due to the water-in-oil structure of the extracellular polymers of sludge particles, the sludge in sewage treatment plants has a high water content and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745B01J23/34B01J21/06B01J23/22B01J21/18B01J21/16C02F11/00C02F11/14
Inventor 周震球尹曙辉尹志强荣杰
Owner JIANGSU ZHAOSHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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