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Method for solidifying sludge

A technology of sludge solidification and sludge, which is applied in the direction of chemical instruments and methods, sludge treatment, fixed/solidified sludge treatment, etc., can solve the problem of affecting the discharge of landfill leachate sewage treatment, reducing the efficiency of sewage treatment in sewage plants, reducing the Problems such as the stability of the garbage dump, to achieve the effect of landfill, low processing cost, and improved strength

Inactive Publication Date: 2017-11-24
HUNAN JUNXIN ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mixed landfill of simple sewage plant sludge and domestic waste will cause serious safety hazards and environmental hazards to the landfill
The mixed filling of uncured sludge and garbage will block the landfill leachate, increase the moisture content of the garbage dump, reduce the stability of the garbage dump, and cause garbage landslides; block the biogas drainage system, resulting in unsmooth biogas drainage, which can cause Biogas explosion accident; the heavy metal content in the sludge is extremely high, which can reduce the efficiency of sewage treatment plants and affect the discharge of landfill leachate sewage treatment standards
Although the existing sludge solidification method can improve the above-mentioned technical defects to a certain extent, the sludge solidification method brings new problems. The volume of the solidified sludge increases significantly, and after the solidified sludge is soaked in water, It may return to the soft plastic state, making the performance of solidified sludge unstable, and it is difficult to meet the requirements of various indicators

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for solidifying sludge of the present invention, comprising the following steps: adding special cement, curing agent and medium sand to raw sludge, in parts by mass, 100 parts of raw sludge, 15 parts of special cement, and 5 parts of curing agent parts, 15 parts of sand. After being stirred evenly, solid matter is formed, and solidified sludge (solidified sludge) is obtained, realizing stable solidification of sludge.

[0031] In this embodiment, the special cement is low-alkalinity sulfoaluminate cement, and the same technical effect can also be achieved by using 8-minute / 15-minute fast-hardening sulfoaluminate cement.

[0032] In this embodiment, the curing agent is NTMC4 powder, produced by Anhui Netzsch Environmental Protection Technology Co., Ltd. The curing agent can be one or more combinations of quick-setting agent, quicklime, mineral powder, early strength agent, NTMC4 powder and other materials.

[0033] In this embodiment, the stirring can preferab...

Embodiment 2

[0038]A method for solidifying sludge of the present invention, comprising the following steps: adding special cement, curing agent and medium sand to raw sludge, in parts by mass, 100 parts of raw sludge, 30 parts of special cement, and 10 parts of curing agent parts, 30 parts of sand. After stirring, solid matter is formed to obtain solidified sludge, which is then disposed of in sanitary landfill.

[0039] In this embodiment, the special cement is 8-minute / 15-minute fast-hardening sulfoaluminate cement, and low-alkalinity sulfoaluminate cement can also be used.

[0040] In this embodiment, the curing agent is NTMC4 powder, produced by Anhui Netzsch Environmental Protection Technology Co., Ltd. The curing agent can be one or more combinations of quick-setting agent, quicklime, mineral powder, early strength agent, NTMC4 powder and other materials.

[0041] In this embodiment, the stirring can preferably be carried out by means of primary stirring and secondary stirring in ...

Embodiment 3

[0045] A method for solidifying sludge of the present invention, comprising the following steps: adding special cement, curing agent and medium sand to raw sludge, in parts by mass, 100 parts of raw sludge, 20 parts of special cement, and 6 parts of curing agent parts, 20 parts of sand. After stirring, solid matter is formed to obtain solidified sludge, which is then disposed of in sanitary landfill.

[0046] In this embodiment, the special cement is low-alkalinity sulphoaluminate cement, and the same technical effect can also be achieved by using rapid hardening sulphoaluminate cement.

[0047] In this embodiment, the curing agent is NTMC4 powder, produced by Anhui Netzsch Environmental Protection Technology Co., Ltd. The curing agent can also be a combination of one or more of quick-setting agent, quicklime, mineral powder, early strength agent and NTMC4 powder.

[0048] In this embodiment, the stirring can preferably be carried out by means of primary stirring and seconda...

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Abstract

The invention discloses a method for solidifying sludge. The method comprises the following steps: special cement, a curing agent and medium sand are added into raw sludge, after stirring, solid materials are formed, and solidified sludge is obtained; the raw materials comprise the following components in parts by mass: 100 parts of raw sludge, 15-30 parts of special cement, 5-10 parts of the curing agent, and 15-30 parts of medium sand. The method has simple operation and low cost, and can be used for substantially improving anti-compression and impermeability effects of solidified sludge, so that 'quantitative reduction, stabilization, harmlessness, and recycling' landfill disposal of the solidified sludge is realized.

Description

technical field [0001] The invention belongs to the technical field of sludge solidification and landfill, and relates to a sludge disposal method in an urban sludge plant, in particular to a sludge solidification method. Background technique [0002] With the acceleration of urbanization in my country, the amount of sludge in urban sewage treatment plants continues to increase. According to statistics, in 2014, 4,436 urban sewage treatment plants were put into operation across the country, with a total designed treatment capacity of 171 million cubic meters per day and an average daily water treatment volume of 135 million cubic meters. According to the calculation of 10,000 tons of water and 5 tons of 80% wet mud, the daily output of sludge in my country can reach 67,500 tons, which is a year-on-year increase of 17.36% compared with the data in June 2010. [0003] In a certain sense, the purification treatment of sewage is to partly transfer these pollutants to the sludge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00
CPCC02F11/008
Inventor 戴道国谭峰袁继雄李林伍兵张大春
Owner HUNAN JUNXIN ENVIRONMENTAL PROTECTION CO LTD
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