| 实际污水培养好氧颗粒污泥及其特性研究 |
| 摘要点击 2241 全文点击 1332 投稿时间：2013-09-03 修订日期：2013-12-13 |
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| 中文关键词 实际城市污水 序批式反应器 好氧颗粒污泥 COD、N、P同步去除 胞外多聚物 矿物质 |
| 英文关键词 real wastewater sequencing batch reactor(SBR) aerobic granule simultaneous COD, N and P removal extracellular polymeric substances(EPS) minerals |
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| 中文摘要 |
| 采用实际城市污水在序批式反应器（SBR）中试装置中成功培养出好氧颗粒污泥. 颗粒污泥的沉降速率>21 m·h-1，显示了良好的沉降性能. 颗粒污泥对化学需氧量（COD）、氮（N）、磷（P）具有同步去除的能力. 在3 h的运行周期中，反应器出水COD<50 mg·L-1，氨氮（NH4+-N）<5.0 mg·L-1，总氮（TN）<15 mg·L-1，对TN和总磷（TP）的去除率达到50%. 采用共聚焦激光扫描显微镜（CLSM）对好氧颗粒污泥的结构分析表明，好氧颗粒污泥的胞外多聚物（EPS）在整个颗粒污泥中均匀地分布，构成颗粒污泥的骨架. 对颗粒污泥的X射线衍射（XRD）分析显示，在好氧颗粒污泥的内部存在许多无机矿物质，在颗粒污泥形成初期，废水中的无机成分可能具有“晶核”的作用. |
| 英文摘要 |
| Microbial granules were successfully developed in a pilot-scale sequencing batch reactor (SBR) for the treatment of real municipal wastewater. The aerobic granules developed had good settleability with a settling velocity of >21 m·h-1. The mature granular sludge was capable of simultaneous removal of chemical oxygen demand (COD), nitrogen (N) and phosphorus (P). With the cycle of 3 h, the effluent COD, ammonium nitrogen (NH4+-N) and total nitrogen (TN) concentrations were <50 mg·L-1, <5.0 mg·L-1, and <15 mg·L-1, respectively. The removal efficiency for TN and total phosphorus (TP) was about 50%. Examinations by confocal laser scanning microscopy (CLSM) showed that extracellular polymeric substances (EPS) were uniformly distributed throughout the granules, forming the granule structure matrix. X-ray diffraction (XRD) analysis indicated the presence of SiO2 and other metal oxides inside aerobic granules, implying that minerals in real wastewater might function as the seed in the initial stage of aerobic granulation. |
