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Effect of flow rate on biofilm accumulation in open channels


, : Effect of flow rate on biofilm accumulation in open channels. Water Research 27(3): 355-360

Experiments were carried out to study the effect of flow shear stress on the rate of accumulation of bottom-attached biofilms. Natural harbour water without special nutrient enrichment was circulated through an outdoor open channel, simulating natural river conditions. Biofilm development on small glass plates (15 times 25 mm) placed on the bottom of the channel was monitored through microscopic examination and determination of total carbohydrate by a recently developed biochemical method. Results indicate that biofilm biomass accumulation was substantially reduced as flow shear stress increased and that the maximum accumulation occurred under very low flow conditions.

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Accession: 002355870

DOI: 10.1016/0043-1354(93)90034-f

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