Post-sludge reduction method for treating urban sludge through titanium-white waste acid

A technology for titanium dioxide waste acid and sludge reduction, which is applied in the direction of oxidation treatment of sludge, special treatment targets, chemical instruments and methods, etc., can solve the problems of large amount of residual sludge, environmental pollution, etc., and achieve sludge discharge The effect of reduced amount, high efficiency, and accelerated oxidation reaction

Inactive Publication Date: 2017-02-22
YANGTZE NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a post-sludge reduction method using titanium dioxide waste acid to treat excess sludge, so as to solve the pollution caused by the discharge of titanium dioxide waste acid to the environment and the waste water generated during sewage treatment. The problem of excessive excess sludge, and then achieve the purpose of treating waste with waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Use the following method to treat the remaining sludge.

[0029] 1) Sludge pretreatment: Take the sludge produced in the secondary sedimentation tank of a sewage treatment plant in Chongqing and put it in a container, and store the container in a refrigerator at 4°C for 24 hours.

[0030]2) Treatment with spent titanium white acid Fenton's reagent: add spent titanium white acid and hydrogen peroxide to the remaining sludge, and stir at a stirring rate of 120 r / min for 90 minutes to obtain a mud-water mixture. Among them, the amount of titanium dioxide waste acid added is based on the amount of Fe added per liter of excess sludge 2+ The ratio of the mass of the hydrogen peroxide to the concentration of the remaining sludge is 0.105:1, and the amount of hydrogen peroxide added is based on the amount of H added to each liter of the remaining sludge. 2 o 2 The ratio of the mass of the sludge to the concentration of the remaining sludge is calculated as 0.566:1.

[0031] ...

Embodiment 2

[0034] Use the following method to treat the remaining sludge.

[0035] 1) Sludge pretreatment: Take the sludge produced in the secondary sedimentation tank of a sewage treatment plant in Chongqing and put it in a container, and store the container in a refrigerator at 4°C for 24 hours.

[0036] 2) Treatment with spent titanium white acid Fenton's reagent: add spent titanium white acid and hydrogen peroxide to the excess sludge, and stir at a stirring rate of 90 r / min for 90 minutes to obtain a mud-water mixture. Among them, the amount of titanium dioxide waste acid added is based on the amount of Fe added per liter of excess sludge 2+ The ratio of the mass of the hydrogen peroxide to the concentration of the remaining sludge is 0.183:1, and the amount of hydrogen peroxide added is based on the amount of H added to each liter of the remaining sludge. 2 o 2 The ratio of the mass of the sludge to the concentration of the remaining sludge is calculated as 1.979:1.

[0037] 3) ...

Embodiment 3

[0040] Use the following method to treat the remaining sludge.

[0041] 1) Sludge pretreatment: Take the sludge produced in the secondary sedimentation tank of a sewage treatment plant in Chongqing and put it in a container, and store the container in a refrigerator at 4°C for 24 hours.

[0042] 2) Treatment with spent titanium white acid Fenton's reagent: add spent titanium white acid and hydrogen peroxide to the remaining sludge, and stir at a stirring rate of 60 r / min for 90 minutes to obtain a mud-water mixture. Among them, the amount of titanium dioxide waste acid added is based on the amount of Fe added per liter of excess sludge 2+ The ratio of the mass of the hydrogen peroxide to the concentration of the remaining sludge is 0.415:1, and the amount of hydrogen peroxide added is based on the amount of H added to each liter of the remaining sludge. 2 o 2 The ratio of the mass of the sludge to the concentration of the remaining sludge is calculated as 2.339:1.

[0043] ...

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Abstract

The invention discloses a post-sludge reduction method for treating urban sludge through titanium-white waste acid. The post-sludge reduction method includes the steps that sedimentation sludge is subjected to oxidation pretreatment through a fenton reagent formed through the titanium white waste acid to achieve the aim that the whole sludge discharging amount is reduced. By means of the post-sludge reduction method, pollution of discharging of the titanium-white waste acid on the environment is solved, the sludge amount generated in the wastewater treating process is reduced, and the effect of using waste to treat waste is achieved. The post-sludge reduction method is short in time consumption, easy and convenient to operate, low in cost and universally suitable for residual sludge weight reduction treatment.

Description

technical field [0001] The invention belongs to the technical field of sludge reduction, and in particular relates to a post-sludge reduction method for treating excess sludge with titanium dioxide waste acid. Background technique [0002] With the acceleration of urbanization, the urban sewage treatment industry has developed rapidly. According to the requirements of the State Council's "Water Pollution Prevention and Control Action Plan", by 2020, all counties and key towns across the country will have sewage collection and treatment capabilities, and the sewage treatment rates in counties and cities will reach about 85% and 95%, respectively. The rate of harmless treatment and disposal of urban sludge at the prefecture level and above should reach more than 90% by the end of 2020. As of June 2015, 3,802 sewage treatment plants have been built and put into operation across the country, with a daily sewage treatment capacity of 161 million cubic meters. However, the const...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/06
CPCC02F11/06C02F2303/06
Inventor 黄辉胜吕利平万邦江
Owner YANGTZE NORMAL UNIVERSITY
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