Constructed-wetland purifying system for alkali wastewater of antimony ore tailing pond

Abstract

The invention discloses a constructed-wetland purifying system for alkali wastewater of an antimony ore tailing pond, belongs to wastewater treatment systems, and aims at providing a wastewater treatment system easy to maintain and manage, low in running cost and capable of continuously and effectively repairing a water body. The constructed-wetland purifying system comprises a multi-stage microorganism wetland reduction pond communicated with a multi-stage settling pond. The multi-stage settling pond is formed by at least two settling pond bodies (4) communicated in sequence. The multi-stage microorganism wetland reduction pond is formed by at least three microorganism wetland reduction pond bodies (1) communicated in sequence. A plurality of cutoff walls (3) alternately arranged at intervals are arranged in each microorganism wetland reduction pond body (1). A first straw layer (9), an organic fertilizer layer (8), a second straw layer (7) and a soil layer (6) are sequentially laid at the bottom of each microorganism wetland reduction pond body (1). The constructed-wetland purifying system is simple in structure, free of mechanical power devices, basically free of daily maintenance and management and good in water quality purification effect; the purifying system is used for treating the alkali wastewater of the antimony ore tailing pond.

Description

technical field [0001] The invention relates to an artificial wetland sewage treatment system, in particular to an artificial wetland system for purifying alkaline wastewater from antimony ore tailing ponds; it belongs to the field of wastewater treatment. Background technique [0002] The tailings produced by the development of antimony mines are accumulated in the tailings pond, and under the leaching action of the mineral processing wastewater and rainwater, a large amount of tailings pond wastewater rich in the toxic element Sb is produced. In order to avoid acidic wastewater produced by sulfide oxidation in tailings ponds, antimony mining companies usually add lime to the tailings ponds to increase the pH of the wastewater, but this treatment method cannot significantly reduce the pH of the antimony tailings ponds. The concentration of Sb in the wastewater; therefore, the unique Sb-rich alkaline wastewater of the antimony ore tailing pond is formed. At present, there i...

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Problems solved by technology

In order to avoid acidic wastewater produced by sulfide oxidation in tailings ponds, antimony mining companies usually add lime to the tailings ponds to increase the pH of the wastewater, but this treatment method cannot significantly reduce the pH of the antimony tailings ponds. Sb concentration in wastewater; thus forming Sb-rich alkaline wastewater unique to antimony ore tailings ponds

At present, there is no practical treatment technology for alkaline wastewater from antimony mine tailings pond in my country

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