Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Full‐scale evaluation of factors affecting the performance of anoxic selectors
Five full‐scale nitrifying activated‐sludge systems incorporating anoxic selectors were evaluated. Operating records were reviewed to determine selector performance (filament control) and to identify operating conditions that affected selector performance. Key operating parameters found to influence anoxic selector performance were selector loading, expressed in terms of the selector food‐to‐microorganism (F:M) ratio, wastewater temperature, and activated‐sludge system aerobic solids retention time (SRT). A target selector F:M ratio of 0.7 to 1.2 kg CBOD5 (carbonaceous biochemical oxygen demand)/kg MLSS (mixed liquor suspended solids) · d (lower values at cooler temperatures, higher values at warmer temperatures) and an aerobic SRT of 8 to 12 days were found to produce excellent selector performance. Increasing selector F:M or system aerobic SRT to greater than these ranges was found to result in persistent filamentous bulking.
Full‐scale evaluation of factors affecting the performance of anoxic selectors
Five full‐scale nitrifying activated‐sludge systems incorporating anoxic selectors were evaluated. Operating records were reviewed to determine selector performance (filament control) and to identify operating conditions that affected selector performance. Key operating parameters found to influence anoxic selector performance were selector loading, expressed in terms of the selector food‐to‐microorganism (F:M) ratio, wastewater temperature, and activated‐sludge system aerobic solids retention time (SRT). A target selector F:M ratio of 0.7 to 1.2 kg CBOD5 (carbonaceous biochemical oxygen demand)/kg MLSS (mixed liquor suspended solids) · d (lower values at cooler temperatures, higher values at warmer temperatures) and an aerobic SRT of 8 to 12 days were found to produce excellent selector performance. Increasing selector F:M or system aerobic SRT to greater than these ranges was found to result in persistent filamentous bulking.
Full‐scale evaluation of factors affecting the performance of anoxic selectors
Marten, William L. (Autor:in) / Daigger, Glen T. (Autor:in)
Water Environment Research ; 69 ; 1272-1281
01.11.1997
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Full-scale evaluation of factors affecting the performance of anoxic selectors
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