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Treatment method for sludge in municipal sewage treatment plant

A technology for urban sewage and treatment methods, which is applied in water/sludge/sewage treatment, sludge treatment, biological sludge treatment, etc. characteristics, improve the economic benefits of enterprises, and overcome the effect of large floor space

Active Publication Date: 2015-06-03
徐明好
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many factors restricting the construction of sludge treatment and disposal facilities, but one of the important restrictive factors is that the overall technical route of national sludge treatment and disposal is not clear enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for treating sludge from urban sewage treatment plants in Example 1 of the present invention is based on the premise that the sludge generated by exposed rivers and lakes in cities and towns can be treated. The process steps are harmless processing, and the treated sludge meets the national standards for controlling pollutants in agricultural sludge.

[0023] The described dehydration modification step is:

[0024] ①Activation modifier: Weigh the one-time usage amount of the powder modifier according to the ratio of 0.05% of the weight of the single treated sludge, and then weigh it according to the ratio of the powder modifier usage to water ratio of 1:1.1 Take tap water and put it in a container and stir it with the powder modifier, and leave it for 18 hours;

[0025] ②Dilution modifier: add tap water with a weight ratio of 1:15 to the liquid modifier in step ① and stir well;

[0026] ③Spray modifier: spray the diluted modifier in step ② on the surface of t...

Embodiment 2

[0032] Embodiment 2 of the present invention is a method for treating urban sewage treatment plant sludge under the condition of external air temperature T>20°C, which is to carry out harmless treatment of urban sewage treatment plant sludge according to the process steps of dehydration modification and heavy metal treatment. Chemical processing, the treated sludge is subjected to the process steps of distilling and extracting mixed crude oil and extracting ammonium carbonate, and the treated sludge meets the pollution control standards in agricultural sludge.

[0033] The described dehydration modification step is:

[0034] ①Activation modifier: Weigh the one-time use amount of powder modifier according to the ratio of 0.08% of the weight of the single treatment sludge, and then weigh the ratio of the powder modifier to water ratio of 1:1.3 Take tap water and put it in a container and stir it with the powder modifier, and leave it for 24 hours;

[0035] 2. Dilution modifier:...

Embodiment 3

[0044] Embodiment 3 of the present invention is a method for treating urban sewage treatment plant sludge under the condition of external air temperature T < 20°C, which is to detoxify the urban sewage treatment plant sludge according to the process steps of dehydration modification and heavy metal treatment. Processing, the treated sludge is subjected to the process steps of distilling and extracting mixed crude oil and extracting ammonium carbonate, and the treated sludge meets the pollutant control standard in agricultural sludge.

[0045] The described dehydration modification step is:

[0046] ①Activating agent: Weigh the one-time use amount of the powder modifier according to the ratio of 0.1% of the weight of the single treatment sludge, and then weigh it according to the ratio of the powder modifier to water ratio of 1:1.2 Tap water and put it in the container and stir it with the powder modifier, and leave it for 20 hours;

[0047] ②Dilution modifier: add tap water w...

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Abstract

The invention discloses a treatment method for sludge in a municipal sewage treatment plant and belongs to the technical field of sludge treatment. The technical scheme adopted by the treatment method is as follows: the treatment method is characterized in that sludge in the municipal sewage treatment plant is subjected to harmless processing and treatment through the processing steps of dehydration, modification and heavy metal treatment, and treated sludge conforms to the national pollutant control standard of agricultural sludge. Compared with the prior art, the treatment method is novel, reliable and free of secondary pollution, changes waste into valuable, realizes harmless treatment of sludge, realizes the outstanding substantial characteristic of resourceful treatment and makes remarkable progress.

Description

technical field [0001] The invention relates to the technical field of chemical industry and environmental protection, and in particular to the technical field of a method for treating sludge in an urban sewage treatment plant. Background technique [0002] In recent years, with the rapid improvement of my country's sewage treatment capacity, the amount of sludge has also increased significantly. As of the end of March 2013, a total of 3,451 urban sewage treatment plants have been built in cities and counties across the country, with a sewage treatment capacity of about 145 million cubic meters per day and an annual production of more than 35 million tons of sludge with a water content of 80%. The number of sewage treatment plants will be increased. According to statistics, about 80% of sewage plants have built sludge concentration and dewatering facilities, which have achieved a certain degree of reduction. However, about 80% of the sludge has not been stabilized, and the...

Claims

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Application Information

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IPC IPC(8): C02F11/00
CPCC01C1/26C02F11/004C02F11/02C02F11/14C02F11/18C02F2101/20C02F2303/06C10G1/00C10G2300/1003
Inventor 徐明好
Owner 徐明好
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