IT1159654B
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1987-03-04
PROCEDURE FOR THE BIOLOGICAL PURIFICATION OF WASTEWATER
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1987-08-07
PROCEDURE FOR THE BILOGICAL PURIFICATION OF WASTEWATER.
KR870700575A
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1987-12-30
Wastewater activated sludge treatment method
MX165202B
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1992-10-30
METHOD FOR TREATING WASTEWATER SLUDGE
ES532452A0
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1985-01-16
PROCEDURE FOR THE PURIFICATION OF WASTEWATER
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1979-09-04
DEVICE FOR THE BIOLOGICAL PURIFICATION OF SERVED WATERS
ZA861402B
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1986-10-29
Process and apparatus for the biological purification of wastewater
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1990-05-18
PROCEDURE AND SYSTEM FOR THE BIOLOGICAL PURIFICATION OF WASTEWATER.
IT8540008A0
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1985-01-25
PROCEDURE FOR THE BIOLOGICAL PURIFICATION OF WASTEWATER
IT7849964A0
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1978-06-21
PROCEDURE FOR THE BIOLOGICAL PURIFICATION OF WASTEWATER
ES551763A0
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1986-12-16
PROCEDURE FOR THE TREATMENT OF WASTEWATER
ES2020528B3
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1991-08-16
PROCEDURE FOR THE BIOLOGICAL PURIFICATION OF WASTEWATER AND EQUIPMENT FOR THE PERFORMANCE OF THIS PROCEDURE.
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1989-02-15
PROCEDURE AND DEVICE FOR ANAEROBIC WASTEWATER PURIFICATION
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1988-01-28
DEVICE FOR THE BIOLOGICAL PURIFICATION OF WASTE WATER
MX159819A
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1989-09-06
DEVICE FOR THE BIOLOGICAL PURIFICATION OF WASTEWATER
IT1197685B
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1988-12-06
PLANT FOR THE BIOLOGICAL PURIFICATION OF WATERS
ITMI920022A0
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1992-01-10
PLANT FOR THE BIOLOGICAL PURIFICATION OF SEWAGE
AT386403B
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1988-08-25
DEVICE FOR BIOLOGICAL WASTEWATER TREATMENT
KR870004908A
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1987-06-02
Anaerobic treatment device for wastewater
GB8705158D0
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1987-04-08
Biological purification of sewage
IT1208022B
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1989-06-01
PROCEDURE FOR WASTEWATER PURIFICATION AND FOR SLUDGE TREATMENT.
NO170536C
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1992-10-28
SEWAGE WASTEWATER TREATMENT
MX5183E
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1983-04-21
IMPROVEMENTS IN PROCEDURE FOR THE BIOLOGICAL PURIFICATION OF WASTEWATER
ITMI922542A0
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1992-11-05
PROCEDURE FOR THE BIOLOGICAL PURIFICATION OF SEWAGE
IT8748138A0
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1987-07-03
PROCEDURE FOR THE BIOLOGICAL PURIFICATION OF METHANOL WASTEWATER