STUDY ON AQUATICD OFF FLAVORS IN EUTROPHIC DONGHU LAKE
东湖富营养水体中藻菌异味性次生代谢产物的研究

The Donghu Lake,in Hube Province,is selected as a typical eutrophic water for the study.The off flavor compounds from different locations monthly were indentified and monitored in the years from 1995 to 1996.Meanwhile,the species and biomasses for algae and bacteria were identified and counted.It was found that the principal compound producing earthy musty odors in the Donghu Lake was 2 methylisobornel (MIB),which came from the secondary metabolites of P.tenue and Actinomycets. There were three apex periods for MIB occurrences,i,e.January,April and September.Furthermore,their concentrations were directly proportional to the eutrophication levels and the biomasses of P.tenue and Actinomycets.