| NO-3和NO-2作为电子受体时的反硝化除磷实时控制 |
| 摘要点击 3182 全文点击 2196 投稿时间：2008-04-24 修订日期：2008-05-28 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 硝酸盐 亚硝酸盐 反硝化除磷 实时控制 ORP pH |
| 英文关键词 NO-3 NO-2 denitrifying phosphorus removal real-time control ORP pH |
|
| 中文摘要 |
| 采用SBR厌氧/缺氧运行方式，研究了NO-3和NO-2作为电子受体时的反硝化除磷效能及ORP与pH作为反硝化除磷过程控制参数的可行性.结果表明，反硝化除磷过程中COD、磷酸盐、电子受体浓度与体系pH和ORP的变化具有较强的相关性.在厌氧阶段，当释磷结束时，pH值平台的出现指示了释磷的结束；在缺氧阶段，吸磷结束后,ORP出现拐点，标志着缺氧吸磷的完成.另外，考察了2种电子受体（NO-3和NO-2）反硝化除磷的效能.在以NO-3为电子受体的反应中，在缺氧初期30 min反应中，平均摄磷速率为32.68 mg/(L·h)，每吸收1 mg PO3-4-Ｐ 约消耗1.14 mg NO-3-Ｎ.在以NO-2为电子受体的反应中，在缺氧初期30 min反应中，平均摄磷速率为17.66 mg/(L·h)，每吸收1 mg PO3-4-Ｐ 约消耗1.57 mg NO-2-Ｎ.综上，提出pH和ORP可以作为2种电子受体（NO-3和NO-2）反硝化除磷的实时控制参数，并且，以NO-3为电子受体系统在摄磷方面优于NO-2电子受体系统. |
| 英文摘要 |
| The simultaneous phosphorus and nitrogen removal using denitrifying phosphate-accumulating organisms with NO-3 and NO-2 as electron acceptors was investigated in an anaerobic/anoxic process. The results showed that the concentrations of COD, PO3-4 and electron acceptors (NO-3 and NO-2) have a correlation with the variation of pH and ORP during anaerobic/anoxic process. In anaerobic phase, the occurrence of pH flat indicates the end of phosphorus release. In anoxic process, an inflexion was observed in ORP profile when the phosphorus uptake was finished. In addition, the phosphorus uptake rate was investigated in the process with different electron acceptors (NO-3 and NO-2). The average anoxic phosphate uptake rate was 32.68 mg/(L·h) in the early 30 min during anoxic phase when NO-3 was as electron acceptor, and every 1 mg PO3-4-Ｐ uptake would consume 1.14 mg NO-3-Ｎ. In the process with NO-2 as electron acceptor, the average anoxic phosphate uptake rate was 17.66 mg/(L·h) in the early 30 min, and every 1 mg PO3-4-Ｐ uptake would consume 1.57 mg NO-2-Ｎ. In conclusion, ORP and pH can be used as control parameters for simultaneous phosphorus and nitrogen removal in an anaerobic/anoxic process, and the system with NO-3 as electron acceptor is superior to the system with NO-2 as electron acceptor. |
