Solidification and stabilization treatment method, product and application of polluted waste sludge

A technology for solidification treatment and waste sludge, applied in sludge treatment, biological sludge treatment, fixed/solidified sludge treatment, etc., can solve the problems of high operation and maintenance cost, excessive heavy metal content, large one-time investment, etc. Reduce dosage, reduce moisture content, and achieve the effect of reuse

Active Publication Date: 2022-01-14
SHANGHAI INVESTIGATION DESIGN & RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, incineration treatment also has obvious disadvantages: its one-time investment is large; the cost of operation and maintenance is high; the content of heavy metals in the ash after incineration may exceed the standard, and discharge without treatment will cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] In one embodiment, the preparation method of the curing agent comprises the steps of:

[0042] (4) Collect tailings from waterworks and process them in a high-pressure steam sterilizer at 105°C for 20 to 30 minutes to remove bacteria and other harmful substances in the tailings and reduce their moisture content to 60%-70%;

[0043] (5) The composite material is uniformly mixed with the tailings from the waterworks treated in step (4) according to the dry weight ratio of 5:100~10:100, and the pH of the mixture is adjusted between 7~8. curing and drying;

[0044](6) The material cured in step (5) is made into granules with a particle size of 30-60 mesh, dried at 105° C. to obtain a curing agent, sealed and stored in a dry place.

[0045] After heat treatment, the composite material of clay and cellulose and the tailing sludge of the waterworks are uniformly mixed according to the dry weight ratio of 5:100 to 10:100 to prepare the curing agent, which can obtain the best f...

example 1

[0082] A solidification and stabilization treatment method for polluted waste sludge,

[0083] The tailings of Liupanshui Water Supply Corporation are selected to use Fe salt and Al salt as flocculant raw materials, wherein the content of Fe is 83g / kg, and the content of Al is 245g / kg;

[0084] The clay material selected is sepiolite, and the molecular composition of described sepiolite is Mg 4 Si 6 o 15 (OH) 2 ·6H 2 O;

[0085] A solidification and stabilization treatment method for polluted waste mud, the steps of which are;

[0086] (1) Collect tailings from Liupanshui Water Supply Corporation, and process them in a high-pressure steam sterilizer at 105°C for 20 minutes to remove bacteria and other harmful substances in the waste tailings and reduce its moisture content to 70%.

[0087] (2) making the sepiolite into granular form with a particle size of 50 mesh, and heating it in a muffle furnace at a temperature of 550° C. for 1 hour;

[0088] (3) Weigh an appropria...

example 2

[0120] A solidification and stabilization treatment method for polluted waste sludge,

[0121] The tailings of Liupanshui Water Supply Corporation are selected to use Fe salt and Al salt as flocculant raw materials, wherein the content of Fe is 83g / kg, and the content of Al is 245g / kg;

[0122] The selected clay material is attapulgite, and the molecular composition of said attapulgite is Mg 5 Si 8 o 20 (OH) 2 (OH 2 ) 4 4H 2 O;

[0123] A solidification and stabilization treatment method for polluted waste mud, the steps of which are;

[0124] (1) Collect the tailings from Liupanshui Water Supply Corporation, and process them in a high-pressure steam sterilizer at 105°C for 25 minutes to remove bacteria and other harmful substances in the waste tailings and reduce its moisture content to 65%.

[0125] (2) making the sepiolite into granular form with a particle size of 70 mesh, and heating it in a muffle furnace at a temperature of 800° C. for 1 hour;

[0126] (3) Weig...

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Abstract

The invention provides a solidification and stabilization treatment method for polluted waste sludge, the method at least comprises the following steps: preparing a solidifying agent: adding a composite material comprising clay material and cellulose to the tail mud of a water plant to obtain a solidifying agent; solidifying treatment: The curing agent is mixed with the polluted waste mud to be treated, the pH value is adjusted, and it is cured. The invention has strong adsorption effect on heavy metal ions and organic matter, and is beneficial to promote the fixation and stabilization of polluted waste sludge. The fixed and stabilized sludge is used for the construction and repair of slope greening, and the solidified and stabilized polluted waste sludge has good water retention performance, providing a carrier for the growth of slope greening plants, and at the same time using plants to further fix, adsorb and mix The pollutants in the sludge have realized the reuse of waste resources, ensured their recycling in nature, and played a strong guiding role in the development of the treatment and disposal technology of polluted waste sludge.

Description

technical field [0001] The invention relates to the field of sludge treatment and utilization, in particular to a solidification and stabilization treatment method, product and application of polluted waste sludge. Background technique [0002] Sewage plant sludge, as a by-product of urban sewage treatment, has unique properties, such as high water content, high organic matter content, and also contains a large number of toxic and harmful substances such as pathogens and heavy metals. The nature of urban domestic sludge is complex and very unstable, it is extremely easy to rot, and emits a pungent smell. If it is directly piled up, it will become a living place for pathogenic microorganisms and other harmful bacteria, causing secondary pollution to the environment. Therefore, the disposal of urban domestic sludge has gradually become one of the urgent problems to be solved in the development of urbanization. [0003] In aquatic ecosystems, sediments are important reservoirs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/02C02F101/20C02F101/30
CPCC02F11/008C02F11/02C02F2101/30C02F2101/20
Inventor 赵玉坤陈煜权左倬李阳
Owner SHANGHAI INVESTIGATION DESIGN & RES INST
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