Number | Date | Country | Kind |
---|---|---|---|
3710325 | Mar 1987 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4437992 | Saito et al. | Mar 1984 | |
4705633 | Bogusch | Nov 1987 | |
4772396 | Voyt | Sep 1988 | |
4793930 | Soeder et al. | Dec 1988 |
Number | Date | Country |
---|---|---|
0200875 | Nov 1986 | EPX |
2149552 | Apr 1972 | DEX |
2333675 | Jan 1974 | DEX |
Entry |
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R. Kayser, et al., Wasser und Boden 5 (1982) 186-193, "Simultane Stickstoffelimination--Beitrag zur praktischen Anwendung auf Klaranlagen" (Simultaneous Nitrogen Removal--Practical Application to Water Purification Plants). |