Abstract
A study was directed toward establishing a new treatment process of odorous gas containing H2S and (CH3)2S by activated sludge. In this experiment, two aeration tubes were used; the one contained activated sludge and the other water. The removal rate was estimated from the odorant concentration by gas chromatography at inlet and outlet of the tube. Each of odorants was removed at high rate of 99% by the sludge acclimated for above 2 days, but the removal rate by water reduced rapidly within few hours after feed initiation. The result of loading test showed that the feed rate of H2S and (CH3)2S to obtain 99% removalwas below about 15 and 9g/kg-MLSS/day. Such performance was kept during the long term (about 50 days) experiment and a large quantity of sulfate was detected in the mixed liquor. When glucose was added to the aeration tube, the removal rate reduced immediately. This showed to be better to avoid the joint treatment ofodorous gas and waste water containing easily assimilable material such as glucose.
