CH66134A
(en )
1914-11-16
Process and plant for sewage treatment
CH50963A
(en )
1911-07-17
Installation for sewage treatment
FR478669A
(en )
1915-12-28
Sewage treatment plant
FR457499A
(en )
1913-09-18
Process for water purification and sludge desiccation
FR435104A
(en )
1912-02-22
Process and devices for water purification
FR439754A
(en )
1912-06-22
Improvements to the sewage and wastewater treatment process
FR438417A
(en )
1912-05-17
Method and device for the purification of feed water
FR418424A
(en )
1910-12-09
Process for the treatment of waste water
FR463317A
(en )
1914-02-19
Water purification process
CH53179A
(en )
1912-02-01
Installation for sewage treatment
FR441302A
(en )
1912-08-03
Process for treating sludge from sewage, in horizontal basins or in pits, separated from the devices for collecting the sludge
FR428919A
(en )
1911-09-11
Method and apparatus for the purification of water for industrial applications
FR475287A
(en )
1915-05-03
Process for gasification of sewage sludge
FR457073A
(en )
1913-09-11
Device for sewage treatment
CH68997A
(en )
1915-05-17
Installation for sewage treatment
FR466806A
(en )
1914-05-25
Process for the purification of cotton waste
FR451905A
(en )
1913-05-02
Process for the treatment of antimony ores
FR451167A
(en )
1913-04-12
Improvements to settling ponds for the treatment of sewage and other putrid water
FR459069A
(en )
1913-10-25
Process for the purification and concentration of wastewater from paper mills
FR445077A
(en )
1912-11-02
Process for the extraction of fats and precious oils from waste water and silt from the clarification of these waters
FR394277A
(en )
1909-01-19
Method and apparatus for the treatment of sewage
FR457303A
(en )
1913-09-16
Oxidation removal process for raw water treatment
FR372371A
(en )
1907-04-04
Process for the clarification and purification of waste water from iron mines
FR477567A
(en )
1915-10-28
Installation for the evacuation and treatment of waste
FR16287E
(en )
1912-12-24
Sludge treatment process