Evaluation of phosphorus removal in anaerobic-anoxic-aerobic system - via polyhydroxyalkonoates measurements

S. H. Chuang, C. F. Ouyang, H. C. Yuang, S. J. You

研究成果: 雜誌貢獻會議論文同行評審

14 引文 斯高帕斯(Scopus)

摘要

Accumulating and utilizing PHAs (polyhydroxyalkanoates), i.e. a major carbon reserve of polyphosphate accumulating organisms (PAOs), is a prerequisite for phosphorus removal in an enhanced biological phosphorus removal (EBPR) system. To evaluate phosphorus removal, this study investigates the behavior of PHAs in a hybrid anaerobic-anoxic-aerobic process, operating under various sludge retention times (5, 10, 12 and 15 days) and dissolved oxygen conditions (0.5, 1.0 and 2.0 mg/l in aerobic stage). PHAs and phosphorus measurements in the pilot-scale experiments demonstrate that the PHAs content of sludge closely relates to phosphorus release and uptake behavios under anaerobic and aerobic conditions, respectively. The aerobic specific-phosphorus-uptake-rate is directly proportional to PHAs content of sludge in the anoxic stage. When the process is under a high organic loading condition, the sludge exhibits a large amount of PHAs having accumulated in the anoxic stage and a high phosphorus uptake rate in the subsequent aerobic stage. However, experimental results confirm that anoxic phosphorus release, leading to a high concentration of phosphorus flow into the aerobic stage, causes deficient phosphorus removal under a high organic loading condition. Moreover, a low PHAs content of sludge causes incomplete phosphorus removal; the phenomenon occurs when the process is under a low organic loading condition. Based on the results presented herein, we can conclude that the organic loading should be carefully controlled for phosphorus removal in the anaerobic-anoxic-aerobic process.

原文???core.languages.en_GB???
頁(從 - 到)107-114
頁數8
期刊Water Science and Technology
38
發行號1 pt 1
DOIs
出版狀態已出版 - 1998
事件Proceedings of the 1998 19th Biennial Conference of the International Association on Water Quality. Part 1 (of 9) - Vancouver, Can
持續時間: 21 6月 199826 6月 1998

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