FR823869A
(en )
1938-01-27
Sewage treatment process
FR642972A
(en )
1928-09-07
Advanced process for accelerating the decomposition of muddy materials in sewage treatment
FR604262A
(en )
1926-05-01
Process for the treatment of cyanide wastewater
FR855252A
(en )
1940-05-07
Process for wastewater treatment
FR787831A
(en )
1935-09-30
Process for the biological and simultaneous purification of wastewater and its sludge
FR644440A
(en )
1928-10-08
Process for the treatment of peat
FR659072A
(en )
1929-06-24
Process for improving the action of treatment liquids used in the textile industry
FR575501A
(en )
1924-08-01
Process for the forced aeration of wastewater
FR641926A
(en )
1928-08-13
Process and product for the purification of petroleum gasoline
FR628088A
(en )
1927-10-18
Process for the treatment of phosphates or substances containing phosphates decomposed by sulfuric acid
FR754837A
(en )
1933-11-14
Process for the treatment of sewage
FR696258A
(en )
1930-12-29
Process and devices for the treatment of skin and leather waste
FR570636A
(en )
1924-05-05
Process for clarifying and purifying liquids and wastewater
FR552414A
(en )
1923-05-01
Method and apparatus for the treatment of sewage and the like
FR668651A
(en )
1929-11-05
Process for the additional treatment of composite steels
FR565509A
(en )
1924-01-29
Improvements in sewage sludge treatment processes or the like
FR654352A
(en )
1929-04-05
Process for the treatment of copper-bearing wastewater from the artificial silk industry
FR639481A
(en )
1928-06-22
Process with devices for the purification, clarification and purification of all water as well as for the separation of materials in order of density
FR617636A
(en )
1927-02-23
Process for the preparation of organic materials containing water in suspension
FR531734A
(en )
1922-01-19
Method and apparatus for the treatment of sewage
FR756911A
(en )
1933-12-18
Improved process for the treatment of substances containing proteinaceous matter
FR706423A
(en )
1931-06-24
Process for the treatment of industrial oily wastewater
FR635717A
(en )
1928-03-23
Catalytic process for the oxidation of organic and mineral substances
FR633696A
(en )
1928-02-02
Marine algae treatment process
FR635624A
(en )
1928-03-20
Process and installation for the purification of solutions