Common stresses affecting activated sludge health and performance--what the four-assay set can tell us.
Previously, we developed a novel biological early warning (BEW) system for directly monitoring the health and performance of activated sludge, the "four-assay set". In the present work, the four-assay set has been used to measure the effects of four common stresses on activated sludge biomass: high temperature; pH; anoxia; and starvation. The results demonstrate both the utility of the Paprican four-assay set as a biomass-evaluating and BEW tool, and the tolerances of a typical kraft mill activated sludge for these four stresses.
Archibald
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Paprican, Boul St-Jean, Pointe Claire, QC H9R 3J9, Canada. farchibald@paprican.ca
Young
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F
D001419:Bacteria / Q000254:growth & development; D018533:Biomass; D019149:Bioreactors; D004784:Environmental Monitoring / Q000379:methods; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D008962:Models, Theoretical; D010100:Oxygen / Q000032:analysis; D010209:Paper; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*
D007220:Industrial Waste; D010100:Oxygen