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A kind of curing agent and treatment method of solid waste with high pH value

A solid waste and treatment method technology, applied in the field of environmental engineering, can solve the problems of unstable heavy metals in hazardous waste, secondary pollution of the environment, etc.

Active Publication Date: 2021-11-05
吉安创成环保科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the hazardous waste disposal industry, for landfill hazardous waste with a high pH value (pH>12), the method of neutralization with high and low pH values ​​is generally adopted for disposal. Landfill Pollution Control Standards (GB18598-2019), the pH value is between 7-12, the heavy metal content of the leachate is qualified, and landfill treatment is carried out; however, the residual heavy metals in the obtained hazardous waste are unstable and will be precipitated due to changes in the pH value causing secondary pollution to the environment

Method used

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  • A kind of curing agent and treatment method of solid waste with high pH value
  • A kind of curing agent and treatment method of solid waste with high pH value

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Embodiment 1

[0025] The present invention provides a curing agent for solid waste, said curing agent comprising a curing agent and a curing agent A B agent, the A agent comprising the curing agent component parts by weight: 4-5 parts of pure phosphoric acid, the said curing agent B comprises the following parts by weight of components: 15 to 20 parts of cement, 10 to 20 parts hydrated lime.

Embodiment 2

[0027] A method of processing solid wastes of high pH the present embodiment of the invention, wherein the method comprises the steps of:

[0028] (1) of the diluted phosphoric acid curing agent A pure agent after mixing the solid waste high pH value was allowed to stand, the solid waste is a high pH according to GB18598-2019 standard solid waste leachate pH> 12, solid waste;

[0029] Mixture (1) obtained in (2) and the step of mixing the agent B in Example 1 of the curing agent the curing agent standing embodiment, the amount of curing agent: curing agent in the weight of pure phosphoric acid comprises from curing agent, and in step (1) in the 4% of the total weight of the solid waste and the high pH value of the cement by weight of the curing agent and the curing agent comprises from 15% by weight of the step of solid waste (1) in the high pH slaked lime and the weight of the curing agent and the curing agent comprises from step (1) 15% of the total weight of the solid waste of ...

Embodiment 3

[0033] A method of processing solid wastes of high pH the present embodiment of the invention, wherein the method comprises the steps of:

[0034] (1) of the diluted phosphoric acid curing agent A pure agent after mixing the solid waste high pH value was allowed to stand, the solid waste is a high pH according to GB18598-2019 standard solid waste leachate pH> 12, solid waste;

[0035] The resulting mixture (2) in step (1) and the rear standing hybrid agent B in Example 1 hardener curing agent embodiments, the amount of curing agent is: The curing agent by weight of pure phosphoric acid comprises from and a curing agent in step (1) in the 4% of the total weight of the solid waste and the high pH value of the curing agent by weight based on the total weight of the cement (a) in the high pH of the solid waste in step 20 and the curing agent % slaked lime and the weight of the curing agent and the curing agent comprises from step (1) in the high pH value of 15% of the total weight of ...

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Abstract

The invention provides a curing agent and a treatment method for solid waste with a high pH value. The curing agent includes a curing agent A agent and a curing agent B agent. The curing agent A agent includes the following components in parts by weight: phosphoric acid 4- 5 parts, the curing agent B includes the following components in parts by weight: 15-20 parts of cement, and 10-20 parts of slaked lime. The curing agent of the present invention is combined with phosphoric acid, cement, and slaked lime to form a pH buffer system of phosphate in the solid waste after solidification treatment, which has a certain stability to the influence of environmental pH, and the solid waste remaining in the solid waste after solidification treatment The heavy metal is stable and will not cause secondary pollution to the environment due to precipitation; the pH buffer system of phosphate is formed in the solid waste after the treatment method of the high pH value solid waste of the present invention, the pH is stable, and the solid waste after solidification treatment remains The heavy metals are stable and will not cause secondary pollution to the environment due to precipitation, and can be safely landfilled.

Description

Technical field [0001] The present invention relates to the field of environmental engineering, in particular to a curing agent and a method for processing solid wastes of high pH. Background technique [0002] Hazardous waste disposal industry, for the higher pH (pH> 12) hazardous waste landfill class, in general, with high and low pH values ​​and way disposal, pH, mixing of hazardous waste leachate after curing get in line "hazardous waste landfill pollution control standard "(GB18598-2019), pH value between 7-12, heavy metal content of the leaching solution qualified landfills; hazardous waste, but the resulting residual heavy metals unstable, due to changes in the pH of the precipitated The cause environmental secondary pollution. Inventive content [0003] Object of the present invention to overcome the shortcomings of the prior art and to provide a curing agent and a method for processing solid wastes of high pH. [0004] To achieve the above object, the present inventi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/34
CPCC04B28/342C04B2111/00775C04B2111/00784C04B7/00
Inventor 叶树强胡国良章鹏兴肖信锦王艳萍
Owner 吉安创成环保科技有限责任公司