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Method for enhancing membrane treatment on nickel-containing electroplating waste water

A technology for nickel electroplating and nickel wastewater, applied in water/sewage treatment, metallurgical wastewater treatment, chemical instruments and methods, etc. The effect of improving the removal rate and improving the utilization efficiency

Pending Publication Date: 2018-08-21
蒲连影
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the recovery rate of electroplating wastewater and the operational stability of the membrane system can be improved in this invention, it is only aimed at the situation of wastewater containing copper. If it also contains other metal ions, this treatment method obviously cannot completely treat the metal ions. , will cause certain pollution to the environment, which is not conducive to the protection of the environment

Method used

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  • Method for enhancing membrane treatment on nickel-containing electroplating waste water
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  • Method for enhancing membrane treatment on nickel-containing electroplating waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for improving the membrane method to treat nickel-containing electroplating wastewater, comprising the following specific steps:

[0023] 1) Treat the electroplating wastewater separately, in which the copper-containing wastewater and the nickel-containing wastewater are concentrated in a pipeline A, and the hydrochloric acid pickling waste liquid flows into the pipeline B, where the pipeline A and the pipeline B are respectively located at the top and bottom of the raw liquid inflow equipment M On both sides, copper-ammonia complex resin and ammonia water with a volume ratio of 3.5:0.7 are added to the upper side of the equipment M to comprehensively treat copper-containing wastewater and nickel-containing wastewater.

[0024] 2) Flow the copper-containing wastewater, nickel-containing wastewater and hydrochloric acid pickling waste treated in step 1) together into the pretreatment device, and add different groups of yeast extract powder, beef powder and trisod...

Embodiment 2

[0027] Utilize cuproammonia complex resin and ammonia water to make following comparison experiment to the removal rate of waste water in the present invention, the removal rate of copper ion and nickel ion, because the water that is saturated with dissolved oxygen under atmospheric pressure in influent, so the dissolved oxygen in effluent water The concentration is negligible relative to the influent water, so the calculation formula of the working oxygen removal capacity can be simplified as:

[0028] C=

[0029] In the formula, C-resin working oxygen removal capacity, gO 2 / L;

[0030] DO- saturated dissolved oxygen concentration of water under test temperature and pressure conditions, mg / L;

[0031] V- the qualified water volume prepared by the test column during the life test, L;

[0032] Vr-the volume of resin loaded on the test column, L.

[0033] The results of the comparative experiments are shown in Table 1:

[0034]

[0035] As can be seen from Table 1, th...

Embodiment 3

[0038] Under the experimental conditions of the present invention, compared with traditional waste water treatment copper ion, nickel ion rejection rate, membrane flux recovery rate etc. have all had bigger improvement, as shown in table 2:

[0039]

[0040] From the above table we can know that Cu in the present invention 2+ The rejection rate is 94.3%~96.1%, Ni 2+ The rejection rate is 95.5%-97.2%, and the membrane flux recovery rate reaches 90.4%-92.2%, which is obviously better than conventional wastewater treatment.

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Abstract

The invention discloses a method for enhancing membrane treatment on nickel-containing electroplating waste water and belongs to the technical field of electroplating waste water treatment. The methodfor enhancing membrane treatment on the nickel-containing electroplating waste water is implemented by three steps of performing treatment, pretreatment and biomembrane treatment on the waste water respectively. According to the method, use of an oxidizing agent is reduced, resources are saved to a certain degree, and new impurities which are brought to the waste liquid due to the use of the oxidizing agent are avoided. Biomembrane treatment and industrial membrane treatment on the waste water are combined by a biological material, so the utilization efficiency of the membrane treatment is improved.

Description

technical field [0001] The invention belongs to the technical field of electroplating wastewater treatment, and relates to a treatment method for nickel-containing electroplating wastewater, in particular to a method for treating nickel-containing electroplating wastewater by an improved membrane method. Background technique [0002] The wastewater and waste liquid discharged from the electroplating factory contain a large amount of metal ions such as: chromium, pickaxe, nickel, cyanide, acid, alkali, and generally organic additives. Some metal ions exist in the form of simple cations, some exist in the form of acid radical anions, and some exist in the form of complex complex ions. Neutralization precipitation method, neutralization coagulation precipitation method, oxidation method, reduction method, barium salt method, ferrite method and other chemical methods are commonly used in electroplating wastewater treatment. The chemical method has simple equipment, less investm...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/34C02F101/20C02F103/16
CPCC02F1/44C02F1/52C02F1/62C02F3/00C02F3/347C02F9/00C02F2101/20C02F2103/16C02F2305/06
Inventor 蒲连影
Owner 蒲连影
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