Reusing method of electroplating wastewater by evaporator system
PURPOSE: A reusing method of Zn-Cr electroplating wastewater by treating COD and heavy metal ion in wastewater with evaporator system is provided. CONSTITUTION: Thickened water which contains COD and condensed water which contains heavy metal ion by evaporating COD and heavy metal ion in Zn-Cr elect...
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| Format: | Patent |
| Sprache: | eng ; kor |
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| Zusammenfassung: | PURPOSE: A reusing method of Zn-Cr electroplating wastewater by treating COD and heavy metal ion in wastewater with evaporator system is provided. CONSTITUTION: Thickened water which contains COD and condensed water which contains heavy metal ion by evaporating COD and heavy metal ion in Zn-Cr electroplating wastewater using evaporator system. The condensed water is used for plating washing water and the thickened water is used for plating water. The vacuum rate of evaporator system is -500 to -600 mmHg and the temperature of electroplating wastewater is 70 to 80 deg.C. The amount of electroplating wastewater is 10 to 20 L/hr and the operation pressure of the front and the back of circulation pump is 0.5 to 0.6 kg/cm¬2 and 2.0 to 2.5 kg/cm¬2.
본 발명은 진공증발농축법을 이용한 Zn-Cr 도금폐수의 처리방법, 더욱 자세하게는 진공증발농축법을 이용하여 Zn-Cr 도금폐수중 중금속이온 및 COD 성분을 분리제거하는 방법을 제공하여, 얻어진 응축수는 도금 수세수로 이용하고 농축수는 도금용액으로 재활용할 수 있도록 함으로써 슬러지 발생을 최소화하면서 Zn-Cr 도금폐수 중의 중금속이온 및 COD성분을 효과적으로 제거할 수 있다. |
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