GB8416993D0
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1984-08-08
Biological activating cleaning of waste waters
EP0541892A3
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1993-06-16
Process of de-oiling and cleaning material covered with greasy and/or oily substances
EP0531955A3
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1993-07-21
Method and apparatus for the determination of nitrification activity in a waste water stream or basin and its application
GB2143811B
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1987-09-23
Biological activating cleaning of waste waters
CS274556B2
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1991-08-13
Method of waste waters treatment
ZA898818B
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1991-12-24
Biological treatment of waste water
GB2258241B
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1995-08-09
Process for gasification of solid and liquid waste
GB9205877D0
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1992-04-29
Treatment of waste or other material
CS883388A1
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1990-05-14
Method of waste waters' biological treatment
CS9000874A2
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1991-09-15
Method of hexamethylenetetramine's biological removal from waste waters
PL281790A1
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1991-04-22
Method of treating waste waters fram painting and plating shops
GB9300886D0
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1993-03-10
Treatment of sewage and like waste liquids
GB9001757D0
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1990-03-28
Treatment of sewage and like waste liquids
PL255336A1
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1987-04-06
Apparatus for biological denitrification and dephosphatation of waste waters
CS599790A3
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1992-06-17
Bio-aeration process of waste water and air containing crude oil substances
BG43766A1
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1988-08-15
Method for biological cleaning of waste waters
CS275409B2
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1992-02-19
Method of waste waters biological treatment
CS108188A1
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1990-07-12
Method of organically polluted sewage waters' biological treatment
GB9101351D0
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1991-03-06
Treatment of sewage and like waste liquids
CS242788A1
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1989-09-12
Method of waste waters treatment
GB9201109D0
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1992-03-11
Treatment of sewage and like waste liquids
HU904097D0
(en )
1991-03-28
Process for sterilizing and denitrifying waters of natural origin
HU895826D0
(en )
1990-02-28
Process and equipment for cleaning of oily-fatty sewages
CS361488A1
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1989-09-12
Method of waste waters purification
CS275042B2
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1992-01-15
Method of pentaerythritol's solutions cleaning