Jun H B, Park S M, Park N B, Lee S H
Department of Environmental Engineering, Chungbuk National University, San 48 Kaeshindong Heungdukgu, Cheongju, Korea 361-763.
Water Sci Technol. 2004;50(6):189-97.
The possible symbiosis between bacteria and anaerobic archaea was investigated in intermittent aeration (I/A) systems. Archaea solution added to I/A reactor might play an important role in biological activities as well as in improvement of mineralization of organic matter. I/A reactor with archaea solution (I/A-arch) could increase both nitrification and denitrification rate and also reduce the sludge yield remarkably. These results indicate the possibility of the symbiotic activated sludge system with anaerobic archaea by controlling the DO level in the aeration tank. In this study, DO was controlled by intermittent aeration schemes and a successful symbiotic activated sludge system was achieved to reach the following conclusions. 1) SOUR of I/A-arch system was 2.9 mg-O2/g-VSS x min. SOUR and nitrification rate of the sludge from I/A-arch was higher than those from the I/A and A/S reactors. 2) Removal efficiencies of organic matter (TCOD(Cr)) in I/A-arch, I/A and conventional activated sludge (A/S) reactors were 93, 90 and 87%, respectively. 3) Nitrification occurred successfully in each reactor, while denitrification rate was much higher in the I/A-arch reactor. Efficiencies of TN removal in A/I-arch, I/A and A/S reactors were 75, 63 and 33%, respectively. 4) Observed yield coefficients of I/A-arch, I/A and A/S reactors were 0.28, 0.41 and 0.37 g-VSS/g-COD.
在间歇曝气（I/A）系统中研究了细菌与厌氧古菌之间可能存在的共生关系。添加到I/A反应器中的古菌溶液可能在生物活性以及改善有机物矿化方面发挥重要作用。含有古菌溶液的I/A反应器（I/A-arch）可以提高硝化和反硝化速率，还能显著降低污泥产量。这些结果表明，通过控制曝气池中的溶解氧（DO）水平，有可能构建厌氧古菌共生活性污泥系统。在本研究中，通过间歇曝气方案控制DO，并成功构建了共生活性污泥系统，得出以下结论。1）I/A-arch系统的比耗氧速率（SOUR）为2.9 mg-O2/g-VSS·min。I/A-arch污泥的SOUR和硝化速率高于I/A和A/S反应器的污泥。2）I/A-arch、I/A和传统活性污泥（A/S）反应器中有机物（TCOD(Cr)）的去除效率分别为93%、90%和87%。3）每个反应器中硝化反应均成功发生，而I/A-arch反应器中的反硝化速率要高得多。A/I-arch、I/A和A/S反应器中总氮（TN）的去除效率分别为75%、63%和33%。4）I/A-arch、I/A和A/S反应器的实测产率系数分别为0.28、0.41和0.37 g-VSS/g-COD。
