Heavy metal wastewater treatment equipment and method

Abstract

The invention relates to heavy metal wastewater treatment equipment comprising a wastewater regulating tank, a pH regulator, a circulating tank, a membrane filter and a neutralizing tank which are sequentially connected through a pipeline, wherein the wastewater regulating tank is internally provided with an aeration device; the pH regulator comprises at least two pipeline mixers which are sequentially connected through a pipeline; the lower part of the circulating tank is communicated with a sludge collecting tank through a pipeline; the membrane filter is an external or internal tubular membrane assembly made of polyvinylidene fluoride, and a concentrated liquid outlet of the membrane filter is connected with the circulating tank through a pipeline; the neutralizing tank is internally provided with a stirrer, a dosing device and a pH value detecting device. The combined processes of process principles such as coagulation, membrane filtration and the like are integrated in the heavy metal wastewater treatment equipment, processes such as coagulation, sedimentation, sand filtration, activated carbon, ultrafiltration and the like in the traditional wastewater treatment are completely substituted, the technical advantages can be sufficiently exerted, and the technical defects can be avoided, so that the stable and reliable treatment efficiency can be obtained, and the higher standard requirement can be met.

Description

Technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a heavy metal wastewater treatment equipment and a treatment method. Background technique [0002] Heavy metal wastewater mainly comes from mechanical processing, mining, iron and steel and non-ferrous metal smelting, and some chemical companies. In the context of highly concentrated modern large-scale industries, wastewater discharged from industrial production, especially heavy metal wastewater, is increasingly polluting the surrounding environment. The heavy metals in wastewater generally cannot be decomposed and destroyed, but can only transfer their location and change their physical and chemical forms. Heavy metal pollution is the discharge of industrial waste water containing heavy metals into rivers, lakes and seas. It will directly have a serious impact on fishery and agriculture, and at the same time directly or indirectly endanger human health. [0003] The charact...

AI Technical Summary

Problems solved by technology

For the requirements of stable operation, good treatment effect, low investment and low operating cost, easy management and operation, and no secondary pollution, the above methods cannot fully meet the requirements

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