AR220706A1
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1980-11-28
PROVISION FOR THE PURIFICATION OF WASTEWATER
IT1075664B
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1985-04-22
PROCEDURE AND DEVICE FOR PURIFICATION OF POLLUTED WATERS
IT1058129B
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1982-04-10
PROCEDURE AND APPARATUS FOR THE POLLUTANT TREATMENT OF WASTE WATER
AR222533A1
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1981-05-29
DEVICE FOR AERATION OF WASTEWATER OR SLUDGE FROM WASTEWATER
BR7900798A
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1979-09-04
DEVICE FOR THE BIOLOGICAL PURIFICATION OF SERVED WATERS
IT1103487B
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1985-10-14
PROCEDURE AND DEVICE FOR THE BIOLOGICAL PURIFICATION OF WASTE WATER CONTAINING NITROGEN COMPOUNDS
AR222243A1
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1981-04-30
WASTEWATER TREATMENT APPARATUS
IT1120237B
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1986-03-19
DEVICE FOR THE MECHANICAL PURIFICATION OF WASTE WATER
NO151700C
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1985-05-22
PROCEDURE FOR BIOLOGICAL DENITRIFICATION OF WASTE WATER
IT1086500B
(en )
1985-05-28
PROCEDURE AND DEVICE FOR THE TREATMENT OF POLLUTED WATER
IT7847961A0
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1978-02-07
PROCEDURE FOR THE TREATMENT OF SEWAGE SLUDGE
IT1105397B
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1985-10-28
APPARATUS AND PROCEDURE TO TREAT WASTE SLUDGE
IT1066138B
(en )
1985-03-04
PROCEDURE AND DEVICE FOR THE PURIFICATION OF WASTE WATER
IT7868897A0
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1978-08-11
PROCEDURE FOR THE EXPLOITATION OF WASTE AND THE CONTEMPORARY PURIFICATION OF WASTE WATER
IT1090227B
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1985-06-26
PROCEDURE AND APPARATUS FOR WASTEWATER PURIFICATION
BR7606400A
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1977-05-31
SURFACE Aerator for Wastewater Purification
AT353713B
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1979-11-26
PROCEDURES AND SYSTEM FOR BIOLOGICAL WASTE WATER PURIFICATION
AR212934A1
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1978-11-15
DEVICE FOR PURIFICATION OF SURFACE AND SEWAGE WATERS
IT1143692B
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1986-10-22
PROCEDURE FOR CHEMICAL PURIFICATION OF WASTEWATER AND DEVICE TO IMPLEMENT ITSELF
ES504678A0
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1982-08-16
DEVICE FOR AERATION OF DOMESTIC AND INDUSTRIAL WASTEWATER
IT1028849B
(en )
1979-02-10
PROCEDURE AND DEVICE FOR THE PURIFICATION OF WASTE WATER CONTAINING OIL
PL209555A1
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1979-06-18
APPARATUS FOR SEA AND BRAKE WATER DISTILLATION
KR830001726U
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1983-10-24
Sludge removal device of water and sewage reservoir
BR7808687A
(en )
1979-08-14
PROCESS AND DEVICE FOR PURIFICATION OF WASTE WATER
BR7708318A
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1979-07-03
DEVICE FOR THE DIGESTION OF SEWAGE WATERS