| The odor problem around sewage and wastewater treatment plants has started to be realized while large-scale public wastewater treatment systems were being built. So all the recently constructed sewage and wastewater treatment plants contain a separate deodorization facility. However, currently deodorization technologies which were already developed and put to practical use to control odors at the treatment plants include physical technologies which adsorb and dilute odor substances and chemical technologies which neutralize, flush, or mask those substances. The main objective of this process, HBR-II, was to develop an oder-free advanced treatment process capable of removing odors and nutrients simultaneously and efficiently in a single sewage and wastewater treatment process using soil origin microorganisms. The results showed that this odor-free advanced treatment process removed 90, 70, and 80% of the influent organics, total nitrogen, and total phosphorus, respectively. At the same time, odor causing compounds were also efficiently removed, i.e., 60, 90, and 90% of influent hydrogen sulfide, methymercaptan, and dimethyl sulfide, respectively. |
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