MD3941C2 - Combined process for purification of galvanic waste waters with reutilization of metals - Google Patents
Combined process for purification of galvanic waste waters with reutilization of metals Download PDFInfo
- Publication number
- MD3941C2 MD3941C2 MDA20080256A MD20080256A MD3941C2 MD 3941 C2 MD3941 C2 MD 3941C2 MD A20080256 A MDA20080256 A MD A20080256A MD 20080256 A MD20080256 A MD 20080256A MD 3941 C2 MD3941 C2 MD 3941C2
- Authority
- MD
- Moldova
- Prior art keywords
- waters
- reutilization
- purification
- galvanic
- metals
- Prior art date
Links
- 238000000034 method Methods 0.000 title abstract 4
- 238000000746 purification Methods 0.000 title abstract 2
- 239000002351 wastewater Substances 0.000 title abstract 2
- 229910052751 metal Inorganic materials 0.000 title 1
- 239000002184 metal Substances 0.000 title 1
- 150000002739 metals Chemical class 0.000 title 1
- 239000003643 water by type Substances 0.000 abstract 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract 1
- 238000004090 dissolution Methods 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 229910001385 heavy metal Inorganic materials 0.000 abstract 1
- 150000004679 hydroxides Chemical class 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 239000010865 sewage Substances 0.000 abstract 1
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention relates to the combined processes for purification of sewage waters, particularly of galvanic waste waters.The process, according to the invention, includes treatment of waters with hydrogen peroxide solution with a concentration of 10...20 mg/L, irradiation with ultra-violet radiation with an intensity of 15...20 J/cm2·min, alkanization of waters up to a pH of precipitation of the insoluble hydroxides of heavy metals in the cathodic chamber of an electrolyzer at a current density of 1...2 A/dm2, with the concomitant acidulation of an electrolyte of auxiliary salts in the anodic chamber, combination of electroflotation with filtration of the precipitate, dissolution thereof in anolyte and reutilization of the obtained solution in the galvanic processes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDA20080256A MD3941C2 (en) | 2008-10-06 | 2008-10-06 | Combined process for purification of galvanic waste waters with reutilization of metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDA20080256A MD3941C2 (en) | 2008-10-06 | 2008-10-06 | Combined process for purification of galvanic waste waters with reutilization of metals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| MD3941F1 MD3941F1 (en) | 2009-07-31 |
| MD3941C2 true MD3941C2 (en) | 2010-02-28 |
Family
ID=40941131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MDA20080256A MD3941C2 (en) | 2008-10-06 | 2008-10-06 | Combined process for purification of galvanic waste waters with reutilization of metals |
Country Status (1)
| Country | Link |
|---|---|
| MD (1) | MD3941C2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MD20130014A2 (en) * | 2013-03-07 | 2014-09-30 | Государственный Университет Молд0 | Process for combined treatment of multicomponent wastewaters |
| MD4288C1 (en) * | 2013-04-02 | 2015-01-31 | Институт Химии Академии Наук Молдовы | Process for groundwater treatment from hydrogen sulfide, iron (II) and manganese (II) ions |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5523001A (en) * | 1994-12-30 | 1996-06-04 | At&T Corp. | Treatment of electroless plating waste streams |
| US5573676A (en) * | 1992-05-06 | 1996-11-12 | Ultra Systems Gmbh Uv-Oxidation | Process and a device for the decomposition of free and complex cyanides, AOX, mineral oil, complexing agents, cod, nitrite, chromate, and separation of metals in waste waters |
| MD3096G2 (en) * | 2005-12-28 | 2007-02-28 | Государственный Университет Молд0 | Plant for water-oil emulsion separation by ultrafiltration |
| MD3097G2 (en) * | 2005-12-06 | 2007-02-28 | Институт Химии Академии Наук Молдовы | Process for underground water purification from sulphureted hydrogen and/or sulphides |
| MD2983G2 (en) * | 2003-08-22 | 2007-12-31 | Производственно-Коммерческая Фирма "Mgm" О.О.О. | Process for water reagent-free softening and device for realization thereof |
-
2008
- 2008-10-06 MD MDA20080256A patent/MD3941C2/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5573676A (en) * | 1992-05-06 | 1996-11-12 | Ultra Systems Gmbh Uv-Oxidation | Process and a device for the decomposition of free and complex cyanides, AOX, mineral oil, complexing agents, cod, nitrite, chromate, and separation of metals in waste waters |
| US5523001A (en) * | 1994-12-30 | 1996-06-04 | At&T Corp. | Treatment of electroless plating waste streams |
| MD2983G2 (en) * | 2003-08-22 | 2007-12-31 | Производственно-Коммерческая Фирма "Mgm" О.О.О. | Process for water reagent-free softening and device for realization thereof |
| MD3097G2 (en) * | 2005-12-06 | 2007-02-28 | Институт Химии Академии Наук Молдовы | Process for underground water purification from sulphureted hydrogen and/or sulphides |
| MD3096G2 (en) * | 2005-12-28 | 2007-02-28 | Государственный Университет Молд0 | Plant for water-oil emulsion separation by ultrafiltration |
Non-Patent Citations (2)
| Title |
|---|
| Виноградов С.С. Экологически безопасное гальваническое производство. ПИП Глобус, Москва, 1998, стр. 199-200. * |
| Смирнов Д.Н., Генкин В.Е. Очистка сточных вод в процессах обработки металлов. Металлургия, Москва, 1980, стр. 145-150. * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MD20130014A2 (en) * | 2013-03-07 | 2014-09-30 | Государственный Университет Молд0 | Process for combined treatment of multicomponent wastewaters |
| MD4288C1 (en) * | 2013-04-02 | 2015-01-31 | Институт Химии Академии Наук Молдовы | Process for groundwater treatment from hydrogen sulfide, iron (II) and manganese (II) ions |
Also Published As
| Publication number | Publication date |
|---|---|
| MD3941F1 (en) | 2009-07-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG4A | Patent for invention issued | ||
| TK4A | Erratum in official gazette in regard to patent for invention |
Free format text: RECTIFICATION IN INID 13 |
|
| KA4A | Patent for invention lapsed due to non-payment of fees (with right of restoration) | ||
| MM4A | Patent for invention definitely lapsed due to non-payment of fees |