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Evaluation of Treatment Characteristics and Sludge Properties in a UASB Reactor Treating Municipal Sewage at Ambient Temperature | ||
| International Journal of Environmental Research | ||
| مقاله 1، دوره 5، شماره 4، آذر 2011، صفحه 821-826 اصل مقاله (430.01 K) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/ijer.2011.438 | ||
| نویسندگان | ||
| M Takahashi* 1؛ A. Ohya2؛ S. Kawakami2؛ Y. Yoneyama3؛ T. Onodera4؛ K. Syutsubo4؛ S. Yamazaki5؛ N. Araki6؛ A. Ohashi7؛ H. Harada8؛ T. Yamaguchi2 | ||
| 1Nagaoka University of Technology, Niigata, Japan, Tohoku University, Miyagi, Japan | ||
| 2Nagaoka University of Technology, Niigata, Japan | ||
| 3Ebara Engineering Service Co., Ltd., Tokyo, Japan | ||
| 4National Institute for Environmental Studies, Ibaraki, Japan | ||
| 5Kochi National College of Technology, Kochi, Japan | ||
| 6Nagaoka National College of Technology, Niigata, Japan | ||
| 7Hiroshima University, Hiroshima, Japan | ||
| 8Tohoku University, Miyagi, Japan | ||
| چکیده | ||
| The evaluation of treatment characteristics and sludge properties of an upflow anaerobic sludge blanket (UASB) process was investigated using a pilot-scale 1.15 m3reactor. The UASB, inoculated with digester sludge, was operated at a hydraulic retention time of 8 h at sewage temperatures ranging from 10.6 to 27.7 °C for more than 1100 days. The stable removal efficiencies for total CODCr and SS were 63 ± 13% and 66 ± 20%, respectively. The average concentration of the retained sludge increased to more than 24.5 gSS/L of the column volume after two years of operation. In summer, the water temperature increased above 20 °C, and biodegradation of solid organic matter was enhanced. The solid retention time was evaluated to be as long as 293 ± 114 days; this is sufficient for mineralisation of solid organic matter, as indicted by a low sludge conversion of 0.029 gVSS/gCODremoved and a growth yield of 0.132 gVSS/gCOD, determined by seasonal sludge profiling. The bacterial communities, based on bacterial 16S rRNA genes in the retained sludge, were significantly diverse. Bacteroidetes and Firmicutes were the dominant phyla of the decomposers of solid organic matter in the library. A Ruminococcus-related clone detected in the Firmicutes phylum acted as a cellulose decomposer. | ||
| کلیدواژه‌ها | ||
| Anaerobic؛ UASB؛ Municipal sewage؛ Ambient temperature؛ Sludge | ||
| مراجع | ||
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Bertin, L., Colao, M. C., Ruzzi, M., Marchetti, L. and Fava, F. (2006) Performances and microbial features of an aerobic packed-bed biofilm reactor developed to post-treat an olive mill effluent from an anaerobic GAC reactor Microbial. Cell Factories , 1-11
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