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Black and odorous sludge treatment method

A treatment method and sludge technology, applied in sludge treatment, biological sludge treatment, water/sludge/sewage treatment, etc., can solve the impact on the health and life of the surrounding residents, the destruction of the surrounding ecological environment, and the secondary pollution of the environment, etc. problems, achieve the effect of reducing heavy metal pollution and reducing costs

Inactive Publication Date: 2018-06-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have high processing costs and are likely to cause secondary pollution to the environment.
Moreover, if the black and odorous sludge from dredging is not disposed of in time, it will cause serious damage to the surrounding ecological environment, and the stench emitted will seriously affect the health and life of the surrounding residents.

Method used

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  • Black and odorous sludge treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Throw the black and odorous sludge from a river dredging into the biological leaching tank, the sludge concentration is 10000mg / L, and the water content is 95%. During the leaching process, Desulfovibrio ( Desulfovibrio ) oxidizes sulfur compounds in the reduced state to form sulfate. The pH in the leaching tank is 3, the hydraulic retention time is 2 days, and the sludge age is 9 days.

[0023] (2) Introduce the supernatant from the leaching tank into the medium containing Desulfovibrio ( Desulfovibrio ) in the anaerobic fluidized bed, Desulfovibrio ( Desulfovibrio ) is added in an amount of 5% of the volume of the influent, and an appropriate amount of bagasse is added to make COD / SO 4 2- =0.6, the temperature of the anaerobic reactor is maintained at 18°C, the pH is maintained at 3, the oxidation-reduction potential (ORP)=-380mv, and sulfate radicals in the liquid phase are reduced to sulfur ions by sulfate-reducing bacteria.

[0024] (3) Lead the effluent...

Embodiment 2

[0026] (1) Put the black and odorous sludge from a certain lake into the bioleaching tank, the sludge concentration is 40000mg / L, and the water content is 90%. During the leaching process, Sulfobacillus ( Sulfobacillus ) oxidizes sulfur compounds in the reduced state to form sulfate. The pH in the leaching tank is 4.2, the hydraulic retention time is 4 days, and the sludge age is 30 days.

[0027] (2) Introduce the effluent from the leaching tank into the Desulfobacterium ) in the anaerobic filter tank, the amount of sulfate-reducing bacteria and influent water is 10% of the volume of influent water, and an appropriate amount of sucrose is added to make COD / SO 4 2- =2.4, the temperature of the anaerobic reactor is maintained at 35°C, the pH is maintained at 6, the oxidation-reduction potential (ORP)=-180mv, and the sulfate radical in the liquid phase is reduced to sulfur ion by sulfate-reducing bacteria.

[0028] (3) Lead the effluent from the anaerobic filter to the sedi...

Embodiment 3

[0030] (1) Throw the black and odorous sludge from a certain river dredging into the biological leaching tank, the sludge concentration is 80000mg / L, and the water content is 75%. During the leaching process, acidophilus ( Acid pHilium ) oxidizes sulfur compounds in the reduced state to form sulfate. The pH in the leaching tank is 6, the hydraulic retention time is 8 days, the sludge age is 5 days, and the sludge return flow is controlled so that the total sludge volume is 1 / 5 of the tank volume.

[0031] (2) Introduce the effluent from the leaching tank into the Desulfotomaculum ) In the upflow anaerobic sludge layer, the amount of sulfate-reducing bacteria added is 35% of the volume of the influent, and brewery wastewater is added to make the COD / SO 4 2- =4.8, the temperature of the anaerobic reactor is maintained at 70°C, the pH is maintained at 10, the oxidation-reduction potential (ORP)=0mv, and the sulfate radicals in the liquid phase are reduced to sulfur ions by su...

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Abstract

The invention discloses a black and odorous sludge treatment method, and belongs to the technical field of sewage treatment. According to the method, dredged sediment in the black and odorous river and lake control process is used as treatment objects; the sludge is put into a biological acidification leaching pool; black metal sulfides in the sludge are oxidized into sulfate radicals and metal ions in the leaching pool; organic sulfur is oxidized and decomposed; biological leaching supernatant fluid is introduced into a sulphate reducing bacterium anaerobic reactor; the sulfate radicals are reduced into sulfur ions; ferric salt or ferrous powder is added into outlet water of the reactor, so that the sulfur ions are precipitated in a form such as ferric sulfide. The method can be used forperforming black and odor removal on the sulfur-containing ingredients in the dredging sludge, and can also be used for removing and recovering heavy metal in the sludge.

Description

technical field [0001] The invention relates to a method for treating black and odorous sludge, which uses methods such as acidification, oxidation, and reduction by sulfate-reducing bacteria to treat the black and odorous river and lake sludge to make sulfide resources. Background technique [0002] With the development of the city, a large amount of organic matter and heavy metals enter the water body, resulting in black and odorous phenomena in rivers and lakes. The sludge from the dredging of black and odorous rivers and lakes will produce odorous gases (such as amines, carbonyl sulfide, hydrogen sulfide) due to the decomposition of organic matter, which will bring damage to the atmospheric environment. Due to the presence of metal sulfides in the sludge, the sludge turns black and cannot be used directly; the accumulation of sludge can easily pollute the groundwater and pose a threat to the health of the surrounding residents. Therefore, solving the problem of sulfur-r...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/02C02F11/04C02F11/12C02F101/10C02F101/20C02F101/30
CPCC02F11/00C02F11/02C02F11/04C02F11/12C02F2101/30C02F2101/20C02F2101/101C02F2303/02
Inventor 胡学伟杨磊黄建洪田森林姚琪
Owner KUNMING UNIV OF SCI & TECH
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