Abstract
Geosmin is a nuisance secondary metabolism compound by some actinomycete and filamentous cyanobacteria. In waterworks, geosmin is a contaminant, which is resistant to conventional water treatment such as coagulation and sedimentation. There is some information about geosmin degradation in the presence of various organic matters. This study examined influence of glucose, sodium acetate and acetic acid on geosmin degradation by biofilm. The results revealed that presence of glucose and sodium acetate enhanced geosmin biodegradation. On the other hand, inhibition effect on geosmin biodegradation occurred from second day of acetic acid condition. The 16S rDNA copy number did not change dramatically during the experiment in organic carbon additional condition, but ATP concentration increased in glucose condition at 2nd day. This result might be showed that geosmin biodegradation was co-metabolism in the presence of glucose or sodium acetate, which played as a role of secondary substrate.
