System and method for deep arsenic removal through coagulation

Abstract

The invention discloses a system and a method for deep arsenic removal through coagulation. According to the method, wastewater is lifted to a distribution pool from an underground water bin through awater pump; the wastewater is homogenized in the distribution pool, and then enters a first-stage reaction pool, and 60 mg / L of polyferric sulfate is added into the first-stage reaction pool througha PFS adding system; the obtained wastewater flows through a second-stage reaction pool, and is subjected to a coagulation reaction for 5 min; the treated wastewater flows through a third-stage reaction pool and a fourth-stage reaction pool, a 0.2 mg / L flocculating agent is added into the fourth-stage reaction pool through a PAM adding system, and a flocculation reaction is performed for 5 min; the obtained wastewater enters a precipitation pool, and is subjected to solid-liquid separation; the separated supernatant flows to a Parshall flume through a water discharge port, and then is discharged out; the underflow sludge of the precipitation pool is conveyed to a sludge storage pool through a mud discharge port so as to be temporarily stored, and then is conveyed to a sludge concentrationpool through a sludge pump so as to be concentrated; and the concentrated supernatant automatically flows into the distribution pool, and the concentrated bottom mud is conveyed to a tailing pond through the sludge pump. According to the present invention, the system is reasonably arranged, and can achieve the deep arsenic removal effect of pit water.

Description

technical field [0001] The invention belongs to the technical field of mine wastewater treatment, and in particular relates to a coagulation depth arsenic removal system and arsenic removal method. Background technique [0002] At present, there are generally three methods for the treatment of arsenic-containing wastewater, physical, chemical and biological methods. The traditional treatment method of arsenic-containing wastewater is mainly chemical precipitation method. This method has advantages and disadvantages. On the one hand, it is cheap and widely used. On the other hand, the arsenic compounds produced will cause secondary pollution to the environment. At present, arsenic-containing wastewater treatment techniques focus on not producing secondary pollution, are cheap, and can treat large areas of wastewater. There are mainly the following methods: [0003] The adsorption method uses the adsorption between the pollutant and the material in real time, so that the po...

AI Technical Summary

Problems solved by technology

Although this method is relatively simple, the effect of using it alone is not ideal, and it needs to be combined with photocatalytic oxidation, so the cost will increase

Therefore, this method is generally used for special pure water production, and it has not been widely used in the treatment of arsenic-containing wastewater.

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