Culture of flocs from isolates of Pseudomonas sp. C-120 from activated sludge Lab-scale activated sludge treating primary clarified bleached kraft mill effluent

Test tubes containing oil-water emulsions (esters, oleic acid, triethanol amine) Bench-scale SBRs treating synthetic wastewater containing lignin Four parallel SBRs treating bleached kraft pulp mill effluent operated at 35°C, 45°C, 55°C, and 60°C

Incubation for 5 min, at 35° C, 40°C, 45°C, 50°C, 55°C, and 65° C

Decreases in 7°C, 16.5°C, 32°C, and 40.5°Cfrom 50°Cfor approximately 8 to 10 h

Heating from 50°C to 70°C, 80°C, and 90°C during 10, 20, 30, 40, and 50 min at each T

Increases from 30°C to 40°C, from 20°C to 30° C, and from 40° C to 50° C

Unsteady-state operation after increases from 35°C to 45°C, from 45°C to 55°C, and from 55°C to 65°C. From 35°C to 45°C: in 2.5°C steps, with 6 to 7 days of acclimation after each shift. From 45°C to 55°C: over 2 weeks, 3 to 4 days in between 2°C increases. From 55°C to 60° C: slow increase over 1 week

Flocs began to deflocculate at temperatures higher than 40° C Complete deflocculation occurred above 55 °C Deterioration proportional to the magnitude of the temperature decrease. The smallest temperature shocks (7°C, 16.5°C) had no impact Survival of microorganisms below 70°C only

Deterioration in microbial activity

Variable and, on average, deterioration in treatment performance

TABLE 17.1 Continued


Norris et al. (2000)76

Bergeron and Paice

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