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Treatment technology and system for simultaneously removing total nickel and total cadmium in waste water

A technology for treating process and waste water, which is applied in the field of water treatment, can solve the problem of not simultaneously removing cold-sealed and turned-over tank waste water, etc., achieves good social and environmental benefits, good treatment effect, and solves the effect of polluting the environment

Active Publication Date: 2018-06-26
南乙环境工程技术(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, there is no treatment method and process for simultaneously removing total nickel and total cadmium in cold-sealed tank turning wastewater, so that the water quality index after treatment can meet the "Electroplating Industry Pollutant Discharge Standard"

Method used

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  • Treatment technology and system for simultaneously removing total nickel and total cadmium in waste water

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The waste water in this embodiment is cold-sealed and turned-over waste water, and the water quality characteristics: the total nickel is 28.9 mg / L, and the total cadmium is 4.1 mg / L.

[0038] A treatment process for simultaneously removing total nickel and total cadmium in wastewater includes the following steps:

[0039] 1) The tourmaline-loaded manganese-based heavy metal trapping agent and wastewater are fully mixed in the pipeline mixer. The dosage of tourmaline-loaded manganese-based heavy metal trapping agent is 125mg / L, the mixing time is 4 minutes, and the liquid-liquid inhomogeneity coefficient is 2.1%, the dispersion is 1.9 microns;

[0040] 2) After step 1), the tourmaline-loaded manganese-based heavy metal trapping agent and waste water enter the inclined plate sedimentation tank for sedimentation. The sedimentation time is 50 minutes. After the inclined plate settles, the total nickel in the cold-sealed and turned-over tank wastewater is 2.1mg / L, The tota...

Embodiment 2

[0047] In this embodiment, the waste water is cold-sealed and turned-over waste water, and the water quality characteristics: the total nickel is 20.3mg / L, and the total cadmium is 4.5

[0048] mg / L.

[0049] Adopt the treatment system identical with embodiment 1 to simultaneously remove total nickel and total cadmium in waste water.

[0050] A treatment process for simultaneously removing total nickel and total cadmium in wastewater includes the following steps:

[0051] 1) The waste water is injected into the pipeline mixer through the water inlet pump, and the tourmaline-loaded manganese-based heavy metal collector is injected into the pipeline mixer through the dosing pump in the dosing box, and the tourmaline-loaded manganese-based heavy metal is collected in the pipeline mixer The agent and the cold-sealed tank turning wastewater are fully mixed, the dosage of tourmaline-loaded manganese-based heavy metal collector is 150mg / L, the mixing time is 6 minutes, the liquid-liqu...

Embodiment 3

[0058] The waste water in this embodiment is cold-sealed and turned-over waste water, and the water quality characteristics: the total nickel is 18.1 mg / L, and the total cadmium is 3.3 mg / L.

[0059] Adopt the treatment system identical with embodiment 1 to simultaneously remove total nickel and total cadmium in waste water.

[0060] A treatment process for simultaneously removing total nickel and total cadmium in wastewater includes the following steps:

[0061] 1) The waste water is injected into the pipeline mixer through the water inlet pump, and the tourmaline-loaded manganese-based heavy metal collector is injected into the pipeline mixer through the dosing pump in the dosing box, and the tourmaline-loaded manganese-based heavy metal is collected in the pipeline mixer The agent and the cold-sealed tank turning wastewater are fully mixed, the dosage of tourmaline-loaded manganese-based heavy metal collector is 75mg / L, the mixing time is 5 minutes, the liquid-liquid uneven...

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Abstract

The invention belongs to the technical field of water treatment, particularly relates to a treatment technology and system for simultaneously removing total nickel and total cadmium in waste water, and solves the problem that no treatment technology or system for simultaneously removing total nickel and total cadmium in waste water exists in the prior art. The technology comprises the following steps that (1) tourmaline loaded with a manganese base heavy metal capturing agent and waste water are fully mixed; (2) the tourmaline loaded with the manganese base heavy metal capturing agent and thewaste water after the step (1) enter a sedimentation tank for sedimentation; (3) the sediment obtained in the step (2) is out of water and enters an absorption tower, a manganese modified activated coke heavy metal adsorption filter material is placed in the absorption tower, and treated water is obtained after the waste water passes through the absorption tower. According to the treatment technology and system for simultaneously removing the total nickel and the total cadmium in the waste water, the heavy metal waste water containing nickel and cadmium and treated with the method and by the system meet the regulations of the GB21900-2008, and the treatment technology and system are particularly suitable for cold seal turning-over jar waste water, belong to the electroplating industry green and environment protection production technology and have good social benefits and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a treatment process and system for simultaneously removing total nickel and total cadmium in wastewater. Background technique [0002] The cold-sealed and turned-over wastewater in the electroplating industry mainly contains nickel ions and cadmium ions, and most of them are discharged to wastewater stations. The main components are total nickel and total cadmium. If they are not treated, they will seriously endanger the environment. At present, the main treatment process used for cold-sealed and turned-over wastewater is mainly coagulation and sedimentation technology, but the quality of the treated effluent water cannot meet the requirements of the "Electroplating Industry Pollutant Discharge Standard". In addition, nanofiltration and reverse osmosis are used to process cold-sealed and turned-over wastewater. For example, CN106348516A discloses a method for recycling el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/20C02F103/16
CPCC02F1/283C02F1/5236C02F1/5281C02F2101/20C02F2103/16
Inventor 张卿监徐静
Owner 南乙环境工程技术(上海)有限公司