IL45726A0
(en )
1974-11-29
Method and apparatus for the purification of water
HK25481A
(en )
1981-06-19
Water purification apparatus
IL49682A
(en )
1979-03-12
Waste water purification system
YU39817B
(en )
1985-04-30
Process for the two-step purification of waste water by means of active slime
PH15297A
(en )
1982-11-12
Process for the purification of water
YU36673B
(en )
1984-08-31
Process for the purification of waste water
CS180576B2
(en )
1978-01-31
Process for the purification of waste water
HU178513B
(en )
1982-05-28
Process for the purification of water
IL48638A
(en )
1978-09-29
Process for the removal of phosphorus from waste water
GB1544494A
(en )
1979-04-19
Process and device for the purification of waste water by means of electroflotation
ZA755618B
(en )
1977-04-27
Apparatus and process for the purification of water
IL47073A0
(en )
1975-06-25
Process for the purification of waste waters
YU36674B
(en )
1984-08-31
Process for the electrochemical purification of waste water
IL48616A0
(en )
1976-02-29
The purification of waste gypsum
JPS5336966A
(en )
1978-04-05
Waste water purifying apparatus
ZA754562B
(en )
1976-07-28
Process for purifying sewage
CS190502B2
(en )
1979-05-31
Method for the biological purification of waste water and device for making the said method
CS189153B1
(en )
1979-04-30
Device for the continuous purification of waste water bymechanical-biological process
ZA738172B
(en )
1975-02-26
A process for the purification of contaminated water
IT1039889B
(en )
1979-12-10
PROCEDURE FOR THE PURIFICATION OF WASTE WATER
EG11716A
(en )
1978-03-29
Purification of water
EG11733A
(en )
1977-10-31
Process for the purification of water by distillation and apparatus for carrying it out
ZA747139B
(en )
1975-11-26
Apparatus for the purification of waste gas
JPS5290165A
(en )
1977-07-28
Apparatus for purifying waste water
CS192021B1
(en )
1979-08-31
Device for continuous purification or treatment of water