AT387009B
(en )
1988-11-25
WASTEWATER PLANT FOR ANAEROBIC WASTEWATER CLEANING
IT1120591B
(en )
1986-03-26
WASTEWATER TREATMENT PROCEDURE
AT377962B
(en )
1985-05-28
DEVICE FOR BIOLOGICAL WASTE WATER TREATMENT
AT362322B
(en )
1981-04-27
METHOD FOR BIOLOGICAL WASTE WATER CLEANING
AT362725B
(en )
1981-06-10
METHOD FOR THE CLEANING OF WATER CONTAINING FAT AND EGG WHITE MATERIALS AND USE OF THE FLOTATION SLUDGE OBTAINED
NO151700C
(en )
1985-05-22
PROCEDURE FOR BIOLOGICAL DENITRIFICATION OF WASTE WATER
SE7906749L
(en )
1980-02-17
WASTEWATER CLEANING
ATA870377A
(en )
1979-08-15
PLANT FOR THE PROCESSING OF WASTE PAPER
LU81265A1
(en )
1979-09-10
DEVICE FOR FINE FILTRATION OF WATER OR WASTE WATER
ATA309077A
(en )
1979-09-15
PLANT FOR THE PROCESSING OF WASTE PAPER
AT358491B
(en )
1980-09-10
TREATMENT OF WASTE AND CLEANING SLUDGE
AT363871B
(en )
1981-09-10
WASTEWATER PURIFICATION PLANT
GB2034296B
(en )
1983-01-26
Biological purification of liquids
DK54079A
(en )
1979-08-12
PROCEDURE FOR BIOLOGICAL WASTE PURIFICATION
AT363867B
(en )
1981-09-10
Flocculants for cleaning waste water
IT1188843B
(en )
1988-01-28
DEVICE FOR THE BIOLOGICAL PURIFICATION OF WASTE WATER
DD137917A5
(en )
1979-10-03
APPENDIX FOR BIOLOGICAL CLEANING OF WASTEWATER
ATA416278A
(en )
1979-08-15
METHOD FOR BIOLOGICAL PURIFICATION OF WASTE WATER
AT360449B
(en )
1980-01-12
METHOD AND DEVICE FOR THE BIOLOGICAL CLEANING OF HIGH-LOADED WASTE WATER
AT346256B
(en )
1978-11-10
DEVICE FOR THE BIOLOGICAL PURIFICATION OF WASTE WATER
AT359118B
(en )
1980-10-27
BITUMINOUS SLUDGE TREATMENT DEVICE
DD137094A1
(en )
1979-08-15
PROCESS FOR BIOLOGICAL CLEANING OF WASTEWATERS
AT372061B
(en )
1983-08-25
PLANT FOR MECHANICAL AND BIOLOGICAL TREATMENT OF WASTEWATER
AT387377B
(en )
1989-01-10
DEVICE FOR THE BIOLOGICAL ACTIVATION CLEANING OF WASTEWATER
ATA30481A
(en )
1986-03-15
DEVICE FOR THE BIOLOGICAL PURIFICATION OF AQUARIUM WATER