Complete equipment using zero-valent iron to reduce and couple microorganisms to prepare Schwertmannite

Abstract

The invention relates to complete equipment using zero-valent iron to reduce and couple microorganisms to prepare Schwertmannite. The complete equipment comprises a biological oxidizing unit (1) and areducing unit (2) and is characterized in that the biological oxidizing unit (1) comprises an oxidizing area (11) and an oxidizing settling area (12); the reducing unit (2) comprises a reducing area(21) and a reducing setting area (22); the oxidizing area (11) uses Fe<2+> to produce the Schwertmannite; the oxidizing settling area (12) can perform solid-liquid separation; the reducing area (21) receives Fe<3+>-rich liquid and zero-valent iron from the oxidizing settling area (12) and allows Fe<3+> and the zero-valent iron to contact sufficient to generate Fe<2+> through reduction; the reducing setting area (22) can perform solid-liquid separation, and the separated Fe<2+>-rich liquid flows back to the oxidizing area (11) to participate in Schwertmannite production. The complete equipmentcan increase the yield of the Schwertmannite and can achieve continuous large-scale production.

Description

technical field [0001] The invention relates to the field of environmental engineering, in particular to a complete set of equipment for preparing Schwittmannite minerals based on zero-valent iron reduction coupling microorganisms. Background technique [0002] Schwittmannite mineral (referred to as Schwetterman's mineral) is a secondary hydroxysulfate ferric mineral commonly found in acidic environments rich in sulfate radicals. It is generally formed at a pH value of 2.5 to 4.5, and its specific surface area is relatively large. Generally 100~200m 2 / g, and contains a large number of hydroxyl groups, sulfate groups and other groups, so that it has a strong adsorption and co-precipitation effect on heavy (like) metal ions, and can promote the natural passivation of these toxic elements. In the practical application of arsenic removal in drinking water, compared with the coagulation-sedimentation method, which easily produces a large amount of arsenic-containing toxic sludg...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to address the problems existing in the prior art, and to provide a complete set of equipment for preparing Schwittmannite minerals based on zero-valent iron reduction coupling microorganisms; The problem of less and a lot of manpower and material resources is needed to achieve the purpose of continuous mass production

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