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1989-01-11
System for removing toxic organics and metals from manufacturing wastewater
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1989-03-15
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1993-10-21
Method and apparatus for purifying waste water
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1999-11-29
Process for purifying waste water
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1993-04-28
Apparatus for processing metal-charged waste sludges
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1994-02-14
Process for purifying sludge containing mainly water
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1989-10-31
Device for purifying waste waters from nitrate or/and nitrite
YU109189A
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1991-02-28
Process for eliminating toxic metals at drinking and waste waters purifying
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1993-08-16
Process and apparatus for purifying industrial wastes of snthetic gypsum.
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1995-01-18
Process and device for purification of waste water.
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1995-11-08
Process for the treatment and disposal of waste waters containing solid or thick matters.
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1993-04-28
Process and apparatus for biological purifying waste waters
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1994-10-13
Method and apparatus for purifying waste water.
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1992-05-28
Device for purifying waste industrial and sewage waters
HRP930306B1
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1997-06-30
Apparatus for purifying waste and faecal waters
HU9500399D0
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1995-04-28
Processing plant for waste water treatment
HU9500005D0
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1995-04-28
Process and system for purifying waste water
HU209506B
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1994-06-28
Method and apparatus for purifying acidous industrial waste water
IL91346A0
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1990-03-19
Process for purifying chromium-containing wastes
PL244056A1
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1985-04-09
Process for separation heavy metals from industrial waters and waste waters
AU1202992A
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1992-08-27
Process and container for waste water purification
CS672488A1
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1989-09-12
Equipment for waste waters' aerobe biological purification
CS588687A1
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1989-08-14
Equipment for town sewage and industrial waste waters treatment
HU9301069D0
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1993-08-30
Method and device for purification of waste waters
CS692188A1
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1990-05-14
Equipment for sewage,agricultural and industrial waste waters treatment