Landfill sludge treatment method

A disposal method and sludge technology, which is applied in the field of sewage or sludge treatment and wastewater, can solve the problems of inability to take into account convenience, rationality and environmental protection, and achieve strong construction operability, short disposal period, and no secondary pollution effect

Active Publication Date: 2018-01-26
中节能大地(杭州)环境修复有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem solved by the present invention is that in the prior art, when the source of sludge is unknown, its composition is unclear and there is an odor, there is no sludge deodorization technology or product that can reasonably act on the filling Landfill sludge cannot take into account the problems of convenience, rationality and environmental protection, and thus provides an optimized disposal method for landfill sludge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] After a certain landfill sludge was detected by the "Air Quality-Odor Determination Three-point Comparative Smelly Bag Method" (GB / T 14675-1993), the odor concentration exceeded 10,000.

[0043] Use this method for disposal:

[0044] 1. Detection and analysis of sludge samples, the results show that the main odor pollutant is ammonia;

[0045]2. Calculate the sludge quality, configure a certain concentration of hydrochloric acid solution and a concentration of 5% hydrogen peroxide (hydrogen peroxide) solution;

[0046] 3. Divide two injection pipes to inject the two solutions into the underground sludge at the same time;

[0047] 4. Through the mixing and stirring equipment installed on the hydraulic excavator, use the blades on the stirring head to stir, so that the solution and the sludge are fully mixed. The amount of hydrochloric acid added is 0.5% of the sludge mass, and the amount of hydrogen peroxide added is 1.5% of mud mass;

[0048] 5. After the sludge mixe...

Embodiment 2

[0052] After a certain landfill sludge was detected by the "Air Quality-Odor Determination Three-point Comparative Smelly Bag Method" (GB / T 14675-1993), the odor concentration exceeded 10,000.

[0053] Use this method for disposal:

[0054] 1. Detection and analysis of sludge samples, the results show that the main odor pollutant is ammonia;

[0055] 2. Calculate the sludge quality, configure a certain concentration of sulfuric acid solution and a concentration of 1% hydrogen peroxide (hydrogen peroxide) solution;

[0056] 3. Divide two injection pipes to inject the two solutions into the underground sludge at the same time;

[0057] 4. Through the mixing and stirring equipment installed on the hydraulic excavator, use the blades on the stirring head to stir, so that the solution and the sludge are fully mixed. The amount of sulfuric acid added is 1.5% of the sludge mass, and the amount of hydrogen peroxide added is 1% of mud mass;

[0058] 5. After the sludge mixed with th...

Embodiment 3

[0062] After a certain landfill sludge was detected by the "Air Quality-Odor Determination Three-point Comparative Smelly Bag Method" (GB / T 14675-1993), the odor concentration exceeded 10,000.

[0063] Use this method for disposal:

[0064] 1. Detection and analysis of sludge samples, the results show that the main odor pollutant is ammonia;

[0065] 2. Calculate the sludge quality and configure a sodium hypochlorite solution with a concentration of 10%;

[0066] 3. Set up an injection pipe to inject the solution into the underground sludge;

[0067] 4. Through the mixing and stirring equipment installed on the hydraulic excavator, use the blades on the stirring head to stir, so that the solution and the sludge are fully stirred, and the amount of sodium hypochlorite added is 5% of the sludge mass;

[0068] 5. After the sludge mixed with the agent is allowed to stand for 5 hours, use a hydraulic excavator to mix in magnesia with a sludge mass of 6%;

[0069] 6. After 24 hou...

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Abstract

The invention relates to a landfill sludge treatment method. The method comprises the following steps: sampling and analyzing sludge, determining the pH value, the type of smelly pollutants, the landfill depth and the horizontal distribution of the sludge, preparing an oxidation preparation, injecting the oxidation preparation into underground sludge by virtue of in-situ mixing and stirring equipment, and simultaneously stirring the oxidation preparation and the sludge underground by virtue of an impeller stirring head of the in-situ mixing and stirring equipment; after uniform stirring, carrying out standing reaction for 3.5-5.5 hours, and putting a curing agent into sludge by using an engineering machine, and stirring continuously by using the in-situ mixing and stirring equipment; afteruniform stirring, standing for 24-48 hours, carrying out open type excavation and transfer on the solidified sludge. By sequentially carrying out in-situ treatment and excavation, the construction operability is strong, the investment cost of the equipment is low, the treatment period is short, the treatment is thorough, the secondary pollution is avoided, the problem of stink pollution in the excavation process of the sludge is solved, and meanwhile, the treatment of the sludge is realized; and the method has relatively good economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of wastewater, sewage or sludge treatment, and in particular relates to a treatment method for landfill sludge. Background technique [0002] With the development of the contaminated site remediation industry and the expansion of cities, more and more sites buried with sludge have been discovered. The source of these sludges is unknown and the composition is unclear, but basically there are odor problems, and some also have heavy metal or organic pollution problems. Direct excavation of the sludge will produce a relatively strong odor, which will seriously affect on-site operations and the surrounding environment. Therefore, it is necessary to Take scientific and reasonable measures. [0003] In the prior art, there are prior technologies related to the treatment of odorous sludge. [0004] Chinese patent ZL201410009136.9 introduces a sludge deodorant, which is composed of coal powder, calcium oxide powder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/06C02F11/00
Inventor 元妙新龚雄武王昌华张飞邱锋
Owner 中节能大地(杭州)环境修复有限公司
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