GB8416993D0
(en )
1984-08-08
Biological activating cleaning of waste waters
GB2143811B
(en )
1987-09-23
Biological activating cleaning of waste waters
ZA898818B
(en )
1991-12-24
Biological treatment of waste water
LTIP1750A
(en )
1995-07-25
Method for biological treatment of waste water
GB2206341B
(en )
1990-11-21
Treatment of organically-based waste matter
AU7164287A
(en )
1987-10-09
System for biological purification of water
GB2201408B
(en )
1991-03-20
Purification of drinking water
GB8627122D0
(en )
1986-12-10
Anaerobic treatment of waste water
GB8705158D0
(en )
1987-04-08
Biological purification of sewage
AU1626988A
(en )
1988-12-02
Process for improving the efficiency of biological purification of waste water and/or sludge treatment
IE870037L
(en )
1987-07-08
Biological purification of waste water
GB8716573D0
(en )
1987-08-19
Biological purification of waste waters
GB8707629D0
(en )
1987-05-07
Purification of effluents & treatment of sludge
GB2187181B
(en )
1990-05-23
Purification of sewage
GB8423437D0
(en )
1984-10-24
Biological treatment of sewage
KR890006901Y1
(en )
1989-10-12
Device for purification of waste water
ZA871492B
(en )
1987-10-28
Treatment of waste water
GB8403850D0
(en )
1984-03-21
Biological treatment of waste water
PT84071A
(en )
1987-02-01
Process for the biological aerobic purification of drain and waste water
GB2218084B
(en )
1992-03-25
Effluent treatment of waste water
BG43766A1
(en )
1988-08-15
Method for biological cleaning of waste waters
PL264954A1
(en )
1988-10-27
Device for biological purification of waste
PL267482A1
(en )
1989-03-06
Device for biological purification of waste
ZA853225B
(en )
1985-12-24
Purification of waste water
GR870506B
(en )
1987-04-13
Complete polyesteric solid unit for biological treatment of sewage