Daniel Barbeau

Oxygen leakage occurred during studies using respirometers that were supposed to be sealed. The leakage occurred around rubber stoppers inserted through the wall of the respirometric vessel and was caused by PTFE tape that was wrapped around the stoppers. Rewrapping the stoppers so that the tape did not extend between the stopper and the glass of the vessel eliminated the

A batch respirometric test was developed to measure the response of activated sludge communities degrading low concentrations of organic chemicals. The low substrate concentrations used in the assay ensure that minimal changes occur in the physiological ...