https://scholars.lib.ntu.edu.tw/handle/123456789/408128
Title: | Strengthening aerobic granule by salt precipitation | Authors: | Chen Y.-Y. Pan X. Li J. Lee D.-J. |
Keywords: | Salt;Sequential batch reactor;Stability;Strength | Issue Date: | 2016 | Journal Volume: | 218 | Start page/Pages: | 1253-1256 | Source: | Bioresource Technology | Abstract: | Structural stability of aerobic granules is generally poor during long-term operation. This study precipitated seven salts inside aerobic granules using supersaturated solutions of (NH 4 ) 3 PO 4 , CaCO 3 , CaSO 4 , MgCO 3 , Mg 3 (PO 4 ) 2 , Ca 3 (PO 4 ) 2 or SiO 2 to enhance their structural stability. All precipitated granules have higher interior strength at ultrasonic field and reveal minimal loss in organic matter degradation capability at 160-d sequential batch reactor tests. The strength enhancement followed: Mg 3 (PO 4 ) 2 = CaSO 4 > SiO 2 > (NH 4 ) 3 PO 4 > MgCO 3 > CaCO 3 = Ca 3 (PO 4 ) 2 > original. Also, the intra-granular solution environment can be buffered by the precipitate MgCO 3 to make the aerobic granules capable of degradation of organic matters at pH 3. Salt precipitation is confirmed a simple and cost-effective modification method to extend the applicability of aerobic granules for wastewater treatments. ? 2016 Elsevier Ltd |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408128 | ISSN: | 09608524 | DOI: | 10.1016/j.biortech.2016.06.111 |
Appears in Collections: | 化學工程學系 |
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