FR625935A
(en )
1927-08-23
New process for the purification of wastewater from distillery and other chemical industries
FR656354A
(en )
1929-05-07
Metal purification process
FR604262A
(en )
1926-05-01
Process for the treatment of cyanide wastewater
FR31895E
(en )
1927-06-18
Process for sterilizing drinking water by electrolysis
FR706423A
(en )
1931-06-24
Process for the treatment of industrial oily wastewater
FR811502A
(en )
1937-04-16
Process for the purification of waste water from sugar distilleries and other chemical industries
FR551624A
(en )
1923-04-10
Industrial process for the recovery of chromium from wastewater
FR570636A
(en )
1924-05-05
Process for clarifying and purifying liquids and wastewater
FR598286A
(en )
1925-12-12
Process for the treatment of marine algae and industrial products resulting from this treatment
FR624101A
(en )
1927-07-08
Chemical purification process for highly calcareous and magnesian water
FR634119A
(en )
1928-02-09
Process for the treatment of raw starchy substances
FR687409A
(en )
1930-08-08
Process for the purification of substances intended for chemical reactions
FR575501A
(en )
1924-08-01
Process for the forced aeration of wastewater
FR676032A
(en )
1930-02-18
Process for sterilizing and purifying drinking water particularly affected by household uses
FR628088A
(en )
1927-10-18
Process for the treatment of phosphates or substances containing phosphates decomposed by sulfuric acid
FR500767A
(en )
1920-03-24
Sewage purification apparatus
FR39511E
(en )
1931-11-30
Water purification process
FR619240A
(en )
1927-03-29
Process for the purification, decoloration and deodorization of liquids and solutions
FR551862A
(en )
1923-04-16
Process for the chemical treatment of peat
FR633745A
(en )
1928-02-02
Process for the purification of kaolin and clays
FR642262A
(en )
1928-08-25
Process for the production and regeneration of activated carbon
CA259056A
(en )
1926-03-16
Process of utilizing sludge from industrial acetylene
FR530493A
(en )
1921-12-23
Improvements to sewage and other wastewater treatment processes
FR571507A
(en )
1924-05-19
Sewage purification method and apparatus
FR625018A
(en )
1927-08-01
Process and apparatus for the concentration or purification of caustic soda or any other products