MD3941F1 - 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

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Publication number
MD3941F1
MD3941F1 MDA20080256A MD20080256A MD3941F1 MD 3941 F1 MD3941 F1 MD 3941F1 MD A20080256 A MDA20080256 A MD A20080256A MD 20080256 A MD20080256 A MD 20080256A MD 3941 F1 MD3941 F1 MD 3941F1
Authority
MD
Moldova
Prior art keywords
waters
reutilization
purification
galvanic
metals
Prior art date
Application number
MDA20080256A
Other languages
Romanian (ro)
Other versions
MD3941C2 (en
Inventor
Olga Covaliova
Original Assignee
Universitatea De Stat Din Moldova
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Universitatea De Stat Din Moldova filed Critical Universitatea De Stat Din Moldova
Priority to MDA20080256A priority Critical patent/MD3941C2/en
Publication of MD3941F1 publication Critical patent/MD3941F1/en
Publication of MD3941C2 publication Critical patent/MD3941C2/en

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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/cm2Àmin, 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.
MDA20080256A 2008-10-06 2008-10-06 Combined process for purification of galvanic waste waters with reutilization of metals MD3941C2 (en)

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 true MD3941F1 (en) 2009-07-31
MD3941C2 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)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4214974A1 (en) * 1992-05-06 1993-11-11 Ultra Systems Gmbh Uv Oxidatio Destruction of free and complex cyanides, AOX, mineral oil, complexing agents, COD, nitrite, chromate and separation of metals in waste water
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
MD20060007A (en) * 2005-12-28 2007-06-30 Universitatea De Stat Din Moldova Plant for water-oil emulsion separation by ultrafiltration

Also Published As

Publication number Publication date
MD3941C2 (en) 2010-02-28

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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