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Wit Transactions on Ecology and The Environment
The mutagen formation potential (MFP) was measured for the river water, the raw sewage and the effluent of the sewage works by means of the Ames Salmonella mutagenicity assay. MFP of the river water samples ranged from 1,200 to 22,000 net revertant colonies per liter of sample water. MFP of the effluent was from 5,300 to 22,000 net revertant colonies per liter. This survey showed that the removal percentages of dissolved organic carbon (DOC) at the sewage works were 62.0-79.3%. It also showeddoi:10.2495/rm070491 fatcat:2qgehgiexbastcdi5gfocrythq