Author:Meiring, PGJ; Oellermann, RADate:1995A system of oxidation ponds in series with a biological trickling filter is described. It was known that this arrangement was incapable of reducing effectively the levels of algae present in the pond liquid even though nitrification was ...Read more
Author:Meiring, PGJ; Drews, RJLC; Van Eck, H; Stander, GJDate:Jan 1968Some of the effluents from the sewage purification systems covered by this report show quite marked seasonal variations. No assurance can be given that the effluents would meet promulgated standards from season to season. The effluent from ...Read more