| 两级SBR工艺去除磷、氮及有机物效能分析 |
| 摘要点击 1704 全文点击 1446 投稿时间：2008-10-08 修订日期：2009-01-09 |
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| 中文关键词 两级SBR 泥龄 聚磷菌 硝化菌 优化除磷脱氮 |
| 英文关键词 two-stage SBR sludge age polyphosphate accumulation organisms (PAOs) nitrobacteria optimization phosphorus and nitrogen removal |
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| 中文摘要 |
| 以模拟生活污水为处理对象，在常温条件下，采用对比试验与机制分析方法，研究了两级SBR工艺分级除磷、去除有机物及脱氮的特性，分析了工艺的效能优势.结果表明，通过控制泥龄（除磷级5～7 d，脱氮级约50 d），可以将异养的PAOs与硝化菌分别控制在2个反应器中优势生长，在出水水质更优的情况下，系统的处理效率可比单级SBR提高1倍以上；两级SBR系统可以有效地缓解有机负荷对硝化过程的冲击影响，在进水COD浓度较高的情况下，能够保持其脱氮级(SBS2)具有稳定的硝化速率，且系统的最终出水可以容易并稳定地达到TP≤0.5 mg·L-1的国家标准；另外，两级SBR的脱氮级(SBS2)除具有优势的硝化菌种外，还能培养出适合降解难降解有机物的异养菌，使其好氧硝化结束时COD浓度较单级SBR系统更低. |
| 英文摘要 |
| Taking simulated domestic sewage as treatment object, the characteristics of separate-stage phosphorus, organic substrate and nitrogen removal were studied in two-stage SBR by contrast experiment and mechanism analysis under the normal temperature, its efficiency-predominance was analyzed. The results indicate that the heterotrophic PAOs and nitrobacteria can be dominant growth in individual reactor respectively, under the effluent quality is more superior, the treatment efficiency is one time higher than that in the single SBR by controlling the sludge age (the phosphorus removal stage 5-7 d, the nitrogen removal stage about 50 d). The two-stage SBR can relieve the attack of organic load to nitrification process effectively, its nitrogen removal stage(SBR2) can still maintain stable nitrification rate under the higher COD concentration and the final effluent of the system is easy and stable to reach national standards (TP≤0.5 mg·L-1). In addition, the nitrogen removal stage (SBR2) of two-stage SBR not only can maintain nitrobacteria predominant, but also can cultivate heterotrophic bacteria which can remove difficult degraded organic substrate, that results in lower COD concentration than in the single’s at the end of nitrification. |
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