GB1543464A
(en )
1979-04-04
Waste water treatment
JPS5499086A
(en )
1979-08-04
Reverse osmosis type water purification apparatus
JPS52154240A
(en )
1977-12-21
Drinking water purifying device
YU234378A
(en )
1982-06-30
Process for purifying waste water
JPS52135552A
(en )
1977-11-12
Drinking water purifying device
YU39817B
(en )
1985-04-30
Process for the two-step purification of waste water by means of active slime
AU2612877A
(en )
1978-12-21
Purifying waste waters
AU2907977A
(en )
1979-03-29
Unit for wastewater treatment by microorganisms
GB1543670A
(en )
1979-04-04
Waste water purifying plant
JPS52138486A
(en )
1977-11-18
Propanee1*33diphosphoric acid for treating water
ZA777362B
(en )
1978-10-25
Process for purifying waste waters
JPS5336966A
(en )
1978-04-05
Waste water purifying apparatus
CS194343B1
(en )
1979-12-31
Reactor for treatment or purifying water by flocculation
ZA771489B
(en )
1978-01-25
Process for the treatment of waste waters
JPS531966A
(en )
1978-01-10
Waste water treating apparatus by active sludge
ZA777363B
(en )
1978-10-25
Process for purifying waste waters
JPS5384362A
(en )
1978-07-25
Device for continuously purifying waste water
JPS5328957A
(en )
1978-03-17
Waste water purifying method
JPS5265967A
(en )
1977-05-31
Purifying tank for sewage treatment
ZA776470B
(en )
1978-08-30
Improved waste water treatment
JPS5325058A
(en )
1978-03-08
Treating method for purifying sewage
JPS5290165A
(en )
1977-07-28
Apparatus for purifying waste water
JPS52127896A
(en )
1977-10-26
Tools for purifying pond water
JPS5345051A
(en )
1978-04-22
Treating method for purifying waste water
CS183329B1
(en )
1978-06-30
Reactor for the biological purification of water