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Odorant concentrations and the pH distribution in a carrier-packed biological deodorization (CPBD) reactor which is currently being used in a sewage treatment plant were measured. The results showed that more than 99% of the H 2 S and 70-80% of the MT were removed from the eaw gas in the early section of the packed bed, which comprised one quarter of the total volume of the CPBD reactor. For...
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