Abstract
Field test has been carried out on advanced methods in summer and winter, in combinations with ozonation, activated carbon adsorption, and biological degradation for the purification of surface river water, which was added Geosmin and 2-methylisoborneol (2-MIB) as a supplement. In this paper, we report the results of removing features of the musty odor substances, principal Geosmin and 2-MIB. The outline of results is as follows :
1) In biological treatment which applied only submerged bio filter, the removal ratios of Geosmin and 2-MIB were 34%, and 23% respectively. So, this unit operation didn't seem to be enough for the removal of the musty odor substances.
2) For the more than 80% removal of Geosmin and 2-MIB, ozone additions of 1.5-1.7mg·l-1 and 1.8-1.9mg·l-1 were needed respectively.
3) More than 95% of the musty odor substances were removed in combination with ozone and activated carbon treatment. Activated carbon which followed ozonation performed an effective role in finishing deodorization, and can be expected its long life effectiveness for the removal of the musty odor substances.
