Solidification stabilization treatment method for polluted waste mud, product and application

A technology of stabilization treatment and solidification treatment, which is applied in sludge treatment, biological sludge treatment, fixed/solidified sludge treatment, etc. It can solve the problems of high operation and maintenance costs, excessive heavy metal content, and large one-time investment. Achieve the effect of realizing reuse, strong adsorption and strong guiding effect

Active Publication Date: 2019-08-06
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

A solidification stabilization treatment method for polluted waste mud is provided. The method at least includes: a step of preparing a solidifying agent, namely a step of adding a composite materialcontaining a clay material and cellulose into tail mud of a tap water plant to obtain the solidifying agent; and a step of solidification, namely a step of mixing the solidifying agent with polluted waste mud to be treated, adjusting the pH value and solidifying the mixture. Heavy metal ions and organic matters are adsorbed efficiently, thus promoting solidification stabilization treatment of thepolluted waste mud. The mud after the solidification stabilization treatment is used for slope greening construction and repairing, and has good water retaining performance, a carrier is provided forplant growth in slope greening and plants are utilized to further adsorb and immobilize pollutants in the mixed mud, thus achieving reutilization of waste resources, and ensuring cyclic conversion inthe nature. The method achieves a good guidance function for development of the polluted waste mud treatment technique.

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 Applications(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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