Black and odorous sludge treatment method

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...

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