Toxicogenomics

• Fukushima, Hara, Nakashima and Tan

ANAMMOX

• Oshiki, Song, Ali, Zhang, Mizuto and Jokai

Microbial Fuel Cells

• Kimura, Ishizaki and Terada

Biofilms

• Tashiro and Ikawa

Fecal pollution

• Kobayashi and Ozawa

Gastroenteritis viruses

• Miura, Itoh, Yoshimura, Mohan and Ohta

Anaerobic ammonium oxidation (anammox) is a biological process in which ammonium is directly converted to dinitrogen gas with nitrite as an electron accepter under anoxic conditions. The anammox process is a new and promising alternative to the conventional nitrogen removal processes. The combination of partial nitrification and anammox process for nitrogen removal would lead to a significant reduction of costs for aeration and exogenous electron donor as compared to the conventional nitrification-denitrification process.

Anammox is carried out by chemolithoautotrophic bacteria belonging to the order planctomycetales. Anammox bacterium grows extremely slowly, dividing only once a week. Thus it is difficult to cultivate this bacterium by conventional microbiological techniques and there is limited information on physiological characteristics of this bacterium. Therefore extensive information is important for practical application.

(ⅰ) to promptly establish and optimize a combination of partial nitrification and anammox process which will give a cost effective nitrogen removal, and (ⅱ) to analyze physiological characteristics of anammox bacterium and to make an important contribution to practical application.

　　

1. Nitrate-dependent ferrous iron oxidation by anaerobic ammonium oxidation (anammox) bacteria
   Oshiki, M., Ishii, S., Yoshida, K., Fujii, N., Ishiguro, M., Satoh, H. and Okabe, S.
   Applied and Environmental Microbiology, accepted.
2. Physiological characterization of an anaerobic ammonium-oxidizing bacterium belonging to the "Candidatus Scalindua" group
   Awata, T., Oshiki, M., Kindaichi, T., Ozaki, N., Ohashi, A. and Okabe, S.
   Applied and Environmental Microbiology, accepted.
3. Development and characterization of the partial nitrification aerobic granules in a sequencing batch airlift reactor
   Song, Y., Ishii, S., Rathnayake, L., Ito, T., Satoh, H., and Okabe, S.
   Bioresource Technology, accepted.
4. Analyses of three dominant membrane proteins from anammox planctomycete Candidatus 'Brocadia sinica'
   Tojo, F., Itoh, Y., Okabe, S., and Morikawa, M.
   Journal of Environmental Biotechnology, 2011, 11(1-2), 77-81.
5. N₂O emission from a partial nitrification–anammox process and identification of a key biological process of N₂O emission from anammox granules
   Okabe, S., Oshiki, M., Takahashi, Y., and Satoh, H.
   Water Research, 45(19), 6461-6470.
6. Physiological characteristics of the anaerobic ammonium-oxidizing bacterium 'Candidatus Brocadia Sinica'
   Oshiki, M., Shimokawa, M., Fujii, N., Satoh, H., and Okabe, S.
   Microbiology, 2011, 157, 1706-1713.
7. Development of long-term stable partial nitrification and subsequent anammox process
   Okabe, S., Oshiki, M., Takahashi, K., and Satoh, H.
   Bioresource Technology, 2011, 102(13), 6801-6807.
8. Development of a simultaneous partial nitrification and anaerobic ammonia oxidation process in a single reactor
   Cho, S., Fujii, N., Lee, T., and Okabe, S.
   Bioresource Technology, 2011, 102(2), 652-659.
9. Nitrogen removal performance and microbial community analysis of an anaerobic up-flow granular bed anammox reactor
   Cho, S., Takahashi, Y., Fujii, N., Yamada, Y., Satoh, H., and Okabe, S.
   Chemosphere, 2010, 78, 1129-1135.
10. Layered structure of bacterial and archaeal communities and their in situ activities in anaerobic granules
    Satoh, H., Miura, Y., Tsushima, I., and Okabe, S.
    Applied and Environmental Microbiology, 2007, 73(22), 7300-7307.
11. In Situ Activity and Spatial Organization of Anaerobic Ammonium-Oxidizing (Anammox) Bacteria in Biofilms
    Kindaichi, T., Tsushima, I., Ogasawara, Y., Shimokawa, M., Ozaki, N., Satoh, H., and Okabe, S.
    Applied and Environmental Microbiology, 2007, 73(15), 4931-4939.
12. Development of a super high-rate ANAMMOX reactor and in situ analysis of biofilm structure and function
    Tsushima, I., Ogasawara, Y., Shimokawa, M., Kindaichi, T., and Okabe, S.
    Water Science and Technology, 2007, 55(8/9), 9-17.
13. Development of High-Rate Anaerobic Ammonium-Oxidizing (ANAMMOX) Biofilm Reactors
    Tsushima, I., Ogasawara, Y., Shimokawa, M., Kindaichi, T., and Okabe, S.
    Water Research, 2007, 41(8), 1623-1634.

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