BE618874A
(en )
1962-10-01
Sewage digestion process
FR1441841A
(en )
1966-06-10
Sewage sludge treatment process
CH493436A
(en )
1970-07-15
Wastewater purification process
FR1419427A
(en )
1965-11-26
Wastewater purification process
FR1435669A
(en )
1966-04-15
Sewage treatment process
FR1299104A
(en )
1962-07-20
Biological purification process for wastewater
FR1409586A
(en )
1965-08-27
Installation for biological wastewater treatment
FR1287509A
(en )
1962-03-16
Method and device for biological purification of wastewater
FR1282768A
(en )
1962-01-27
Biological purification process for wastewater, and device for its implementation
BE580791A
(en )
1959-11-16
Process for the purification of water which contains organic impurities.
BE604773A
(en )
1961-10-02
Biological purification process for wastewater
FR92912E
(en )
1969-01-17
Wastewater purification process.
FR1390078A
(en )
1965-02-19
Wastewater purification process
FR1223836A
(en )
1960-06-20
Wastewater purification process
FR1342547A
(en )
1963-11-08
Process and installation for the biological purification of wastewater containing detergents
FR1358224A
(en )
1964-04-10
Wastewater and wastewater purification process
FR1324521A
(en )
1963-04-19
Wastewater treatment process
FR1375204A
(en )
1964-10-16
Wastewater purification process
FR1371140A
(en )
1964-08-28
Process for the purification of wastewater containing hydrocarbons
FR1382860A
(en )
1964-12-18
Wastewater purification process
BE619440A
(en )
1962-10-16
Paper mill wastewater purification process
FR1142880A
(en )
1957-09-24
Wastewater purification process
FR1492667A
(en )
1967-08-18
Process and equipment for the biological purification of wastewater
FR1389723A
(en )
1965-02-19
Process for the purification of wastewater containing nitrocresols
FR1202208A
(en )
1960-01-08
Device and method for the biological purification of wastewater