KR870700575A
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1987-12-30
Wastewater activated sludge treatment method
IT8519779A0
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1985-03-06
PROCEDURE FOR DEHYDRATING MUNICIPAL SEWAGE SLUDGE AND OTHER SEWAGE SLUDGE.
DK428586A
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1986-09-24
PROCEDURE FOR BIOLOGICAL TREATMENT OF WASTE WATER
DK609885D0
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1985-12-30
PROCEDURE FOR MODIFICATION OF ORGANISMS
DK174486D0
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1986-04-16
PROCEDURE FOR THE CONVERSION OF BIOLOGICAL WASTE MATERIAL
IT1147298B
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1986-11-19
PURIFICATION PROCEDURE FOR WATERS CONTAINING ORGANIC POLLUTANTS
DK232788A
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1988-10-31
PROCEDURE FOR BIOLOGICAL TREATMENT OF WASTE WATER
DK462886A
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1987-03-31
GENERAL EFFECTS FOR TREATMENT OF WATER SYSTEMS
DE3582069D1
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1991-04-11
WATER AERATOR.
AT379122B
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1985-11-25
WASTEWATER SYSTEM FOR THE BIOLOGICAL PURIFICATION OF ORGANICALLY POLLUTED WASTE WATER
DK293585D0
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1985-06-28
PROCEDURE FOR BIOLOGICAL DENITRIFICATION OF GROUNDWATER INTENDED FOR DRINKING WATER
FR2604168B1
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1991-07-05
ACTIVE SLUDGE BASIN
BR8506065A
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1986-08-19
SYSTEM FOR THE TREATMENT OF WASTE WATER
IT1197685B
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1988-12-06
PLANT FOR THE BIOLOGICAL PURIFICATION OF WATERS
NO170536C
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1992-10-28
SEWAGE WASTEWATER TREATMENT
IT8720050A0
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1987-04-09
PROCEDURE FOR THE PURIFICATION OF WASTE WATER AND FOR THE TREATMENT OF SLUDGE.
FR2573747B1
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1987-02-27
ACTIVATED SLUDGE BASIN
DK161157C
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1991-12-09
PROCEDURE FOR PREPARING DRINKING WATER
ATA165985A
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1990-08-15
WASTEWATER TREATMENT PLANT
GB8716573D0
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1987-08-19
Biological purification of waste waters
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1986-09-22
PROCEDURE FOR BIOLOGICAL TREATMENT OF SEWAGE WATER.
DK417487A
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1988-02-13
PROCEDURE FOR BIOLOGICAL TREATMENT OF WASTE WATER
FR2577210B1
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1988-12-23
ACTIVATED SLUDGE BASIN
FR2586046B1
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1987-12-24
WATER DRAINAGE NETWORK
SE8500909D0
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1985-02-25
Procedure for desalination of water