Application of plastic media trickling filters for biological nitrification systems / by ... and Stevens E. Richardson
Duddles, Glenn A.
Application of plastic media trickling filters for biological nitrification systems / by ... and Stevens E. Richardson - Washington : U. S. Environmental Protection Agency, 1973 - 111, 1 p - Environmental protection technology series ; EPA-R2-73-199 .
Water--Purification--Filtration
Water--Purification--Biological treatment
TD475 D8
Application of plastic media trickling filters for biological nitrification systems / by ... and Stevens E. Richardson - Washington : U. S. Environmental Protection Agency, 1973 - 111, 1 p - Environmental protection technology series ; EPA-R2-73-199 .
Water--Purification--Filtration
Water--Purification--Biological treatment
TD475 D8

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