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Premodulation technology for concentrated advanced treatment of sludge

An advanced treatment and pre-conditioning technology, applied in sludge treatment, water/sludge/sewage treatment, dehydration/drying/concentrated sludge treatment, etc., can solve the problems of thick and difficult sludge treatment, and reduce the interface Tension, effects that increase mixing, increase shear

Inactive Publication Date: 2013-04-10
JIANGSU ZHAOSHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In view of the disadvantages that the sludge after the initial dehydration is relatively thick and difficult to handle in the above-mentioned centralized sludge treatment, the applicant provides a reasonable pre-modulation process for the centralized and advanced treatment of the sludge, so as to successfully solve the problem of introducing the sludge after the preliminary dehydration into the loaded TiO 2 Difficulties in Photocatalytic Advanced Treatment

Method used

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  • Premodulation technology for concentrated advanced treatment of sludge
  • Premodulation technology for concentrated advanced treatment of sludge

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Import 6,776kg of municipal sludge with a water content of 79% and an organic matter content of 33% into the conditioning tank, add 285 liters of polyaluminum sulfate with a concentration of 5% (the weight ratio is 1% of the absolute dry sludge), add water to dilute to a water content of 97%, and at the same time Turn on the cutting and crushing mixer (300r / min), stir for 10min, and introduce it into the photocatalytic oxidation tank through the screw pump, and then add the loaded TiO in the reaction tank 2 Photocatalyst 75kg, after stirring for 5 minutes, turn on the ultraviolet generator 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 to react, and react for 50 minutes while stirring. Then add composite coagulant (PAC13.8kg, PAM1.80kg) through the dispensing tank, and after 5 minutes, discharge the supernatant in the reaction tank into the drainage sys...

Embodiment 2

[0031]Import 7035kg of municipal sludge with 80% water content and 36% organic matter content into the preparation tank, add 150 liters of polyaluminum sulfate with a concentration of 5% (0.5% by weight of the absolute dry sludge), dilute with water to 99% water content, and at the same time Turn on the cutting and crushing mixer (300r / min), stir for 5 minutes, and introduce the photocatalytic oxidation tank through the screw pump, and then add the loaded TiO in the reaction tank 2 The photocatalyst was 76.02 kg. After stirring for 5 minutes, the ultraviolet generator was turned on to irradiate the sludge in the reactor. At the same time, high-energy electrons were introduced through the aeration pipeline through the high-energy electron generator to react, and the reaction was carried out for 60 minutes while stirring. Then add composite coagulant (PAC15.00kg, PAM1.82kg) through the dispensing tank, and after 5 minutes, discharge the supernatant in the reaction tank into the d...

Embodiment 3

[0033] 9430kg of printing and dyeing sludge with a water content of 83% and an organic matter content of 36% was introduced into the preparation tank, and 320 liters of polyaluminum sulfate was added at a concentration of 25% (the weight ratio was 5% of the dry sludge), diluted with water to a water content of 97%, and added Sodium tripolyphosphate 8.25kg (the weight ratio is 5‰ of the absolute dry sludge), at the same time start the cutting and crushing mixer, stir for 15min, enter the photoelectric catalytic oxidation tank through the screw pump, and then add the loaded TiO in the reaction tank 2 The photocatalyst was 86.5 kg. After stirring for 5 minutes, the ultraviolet generator was turned on to irradiate the sludge in the reactor. At the same time, the high-energy electrons were introduced into the reactor through the high-energy electron generator through the aeration pipeline for reaction, and the reaction was carried out for 30 minutes while stirring. Then add composit...

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Abstract

The invention discloses a premodulation technology for concentrated advanced treatment of sludge. The premodulation technology comprises the following steps that Step1, polyaluminium sulfate is added to the sludge which is dehydrated in advance to allow a water content to be 78-83%; a weight ratio of the polyaluminium sulfate to absolute dry sludge is 0.5-5.0%; the sludge is diluted with water till the water content is 96-99%; and Step 2, a high-speed cutting and crushing agitator is started to operate for 5-15 minutes for agitating and mixing the sludge to accomplish a premodulation task. According to the premodulation technology, when the sludge is diluted, polyaluminium sulfate and sodium tripolyphosphate are used to perform cutting, emulsification, dispersing and flocculation on electriferous sludge zoogloea, fat type substances, protein and the like, and the high-speed cutting and crushing agitator is used for mechanical crushing, so that micelles and floccules are broken; a mixing effect of a supported TiO2 photoelectric catalyst is improved; and subsequent concentrated advanced treatment on the supported TiO2 photoelectric catalyst is facilitated.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a preconditioning process for centralized and advanced treatment of sludge. Background technique [0002] With the acceleration of my country's urbanization process, the capacity of urban sewage treatment has increased year by year, and the output of sludge produced by sewage treatment plants has increased sharply at an annual growth rate of more than 10%. In recent years, the state has actively supported from policies and financial resources to build a large number of urban sewage treatment facilities to protect the water environment, prevent water pollution, and promote the sustainable development of the national economy and ecological environment. As of the end of March 2012, a total of 3,198 urban sewage treatment plants have been built in cities and counties across the country, with a treatment capacity of 138 million cubic meters per day; about 1,300 urban ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/14
Inventor 周震球尹曙辉尹志强荣杰周震宇羊新根
Owner JIANGSU ZHAOSHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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