AR198069A1
(en )
1974-05-31
PROVISION FOR THE MECHANICAL BIOLOGICAL PURIFICATION OF WASTE WATER
AR207955A1
(en )
1976-11-22
AN APPARATUS FOR THE BIOLOGICAL TREATMENT OF WASTEWATER
IT1061329B
(en )
1983-02-28
WASTEWATER PURIFICATION SYSTEM
AT323083B
(en )
1975-06-25
CONTINUOUS PROCEDURE FOR BIOLOGICAL PURIFICATION OF WASTEWATER AND EQUIPMENT FOR CARRYING OUT THE PROCEDURE
BR7200913D0
(en )
1973-06-14
COMPOSITION FOR BIOLOGICAL DETRIT DISPOSAL
IT975086B
(en )
1974-07-20
PROCEDURE AND APPARATUS FOR THE BIOLOGICAL PURIFICATION OF RESIDUAL WATER
SE399055B
(en )
1978-01-30
PROCEDURE AND BIOLOGICAL BED FOR PHYSICAL AND / OR BIOLOGICAL WASTEWATER PURIFICATION
IT1013776B
(en )
1977-03-30
MEANS AND PROCEDURE FOR THE PURIFICATION OF CONTAMINATED WATER
AR196618A1
(en )
1974-02-12
IMPROVEMENTS IN COMBINED DEVICES FOR THE BIOLOGICAL PURIFICATION OF WASTEWATER BY MEANS OF ACTIVATED SLUDGE
CH492649A
(en )
1970-06-30
Clarifier for biological wastewater treatment
AR207454A1
(en )
1976-10-08
PROCEDURE AND APPARATUS FOR THE BIOLOGICAL PURIFICATION OF WASTEWATER
CH519444A
(en )
1972-02-29
Process for the purification of sewage
IT975772B
(en )
1974-08-10
PROCEDURE FOR THE BIOLOGICAL PURIFICATION OF WASTE WATER
IT1022231B
(en )
1978-03-20
PROCEDURE AND DEVICE FOR THE PURIFICATION OF LATTAM
AR195191A1
(en )
1973-09-19
PERFECTED APPARATUS FOR THE BIOLOGICAL PURIFICATION OF WASTEWATER
NO137592C
(en )
1978-03-21
DEVICE FOR BIOLOGICAL TREATMENT OF WASTEWATER
IT970092B
(en )
1974-04-10
BIOCHEMICAL PROCEDURE FOR THE PURIFICATION OF WASTE WATER
ES177618Y
(en )
1973-04-16
DEVICE FOR BIOLOGICAL TREATMENT OF WASTEWATER.
AR193460A1
(en )
1973-04-23
PROCEDURE FOR THE PURIFICATION OF 1-NITROANTHRAQUINONE CONTAMINATED BY DINITROANTRAQUINONE
IT1005700B
(en )
1976-09-30
MEANS AND PROCEDURE FOR THE PURIFICATION OF CONTAMINATED WATER
IT1053080B
(en )
1981-08-31
PROCEDURE FOR THE BIOLOGICAL PURIFICATION OF WASTEWATER AND PLANT FOR THE EXECUTION OF THE PROCEDURE
BE796458A
(en )
1973-09-10
PERFECTED PROCESS FOR THE PREPARATION OF CEPHALOSPINES
IT953945B
(en )
1973-08-10
DEVICE FOR BIOLOGICAL PURIFICATION OF WASTE WATER
AT346256B
(en )
1978-11-10
DEVICE FOR THE BIOLOGICAL PURIFICATION OF WASTE WATER
IT998128B
(en )
1976-01-20
SUBSTANCE FOR THE PURIFICATION OF WASTE WATER