Abstract
Since June 25, 1992, the Bureau has been operating an advanced water purification facility which is a combination system of ozonation and biological activated carbon treatment to remove musty odor. The treatment performance of this system is getting good results in treated water quality because the facility can remove not only the musty odor substance (2-methyl isoborneol) but can also reduce the anionic surfactants, ammonia nitrogen and trihalomethane formation potential consistently and effectively. In the year since the facility was introduced, the musty odor has been removed from purified water, according to our expectations, at the Kanamachi purification plant.
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