https://scholars.lib.ntu.edu.tw/handle/123456789/408370
標題: | Use of aerobic granules for treating synthetic high-strength ammonium wastewaters | 作者: | Yu X. Wan C. Lei Z. Liu X. Zhang Y. Tay J.H. Lee D.-J. |
關鍵字: | Adsorption;Aerobic granules;Dissolved oxygen;High-strength ammonium wastewater;Nitrogen removal | 公開日期: | 2014 | 卷: | 35 | 期: | 14 | 起(迄)頁: | 1785-1790 | 來源出版物: | Environmental Technology (United Kingdom) | 摘要: | In this work, two identical sequencing batch reactors (SBRs) with mature aerobic granules were utilized to treat synthetic high-strength ammonium wastewaters with chemical oxygen demand (COD)/total nitrogen (TN) ratios of 3.9-6.9. The contributions of various mechanisms to the removal of ammonium were determined. Ammonium levels of 600-2000 mg-N l-1 had little adverse effect on the COD removal rate (91.6%-95.3%) with an influent COD of 4490-9860 mg l-1. The TN removal rate was slightly reduced from 71.3% to 59.6% as the influent ammonium concentration was increased from 600 to 2000 mg NH +4-N l-1. Experimental results indicated that aerobic granules removed 94.5% of COD and 59.6% of TN in the treatment of synthetic high-strength wastewater (9860 mg-COD l-1 and 2000 mg -N l-1) during a 12 h cycle. Granular adsorption, air stripping and conversion by nitrification/denitrification were responsible for removing 9%, 15% and 76%, respectively, of the total removed NH+4-N. Dissolved oxygen (DO) was a useful process indicator of the biological reactions in the treatment of high-level ammonium wastewaters. ? 2014 Taylor & Francis. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408370 | ISSN: | 09593330 | DOI: | 10.1080/09593330.2014.882992 |
顯示於: | 化學工程學系 |
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