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首页> 外文会议>International Water Association(IWA) Conference; 20050518-20; Xi'an(CN) >Comparison of nutrient removal efficiency between pre-and post-denitrification wastewater treatments
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Comparison of nutrient removal efficiency between pre-and post-denitrification wastewater treatments

机译：硝化前后废水处理中脱氮效率的比较

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Shortage of organic substances (COD) may cause a problem of the biological nutrient removal, that is, lower influent COD concentration leads to lower nutrient removal rates. The biological phosphorus removal and the denitrification are reactions in that COD is indispensable. As for biological simultaneous nitrogen and phosphorus removal systems, a competition problem of COD utilization between polyphosphate accumulating organisms (PAOs) and non-polyphosphate-accumulating denitrifiers is not avoided. From the viewpoint of effective utilization of limited influent COD, denitrifying phosphorus-removing organisms (DN-PAOs) can bring effective use of it. In this study, DN-PAOs activities in modified UCT (pre-denitrification process) and DEPHANOX (post-denitrification ptocess) wastewater treatments were compared. In conclusion, the post-denitrification systems can use of influent COD more effectively and have higher nutrient removal efficiencies than the conventional pre-denitrification systems.
机译：有机物（COD）的短缺可能会导致生物营养去除的问题，即较低的进水COD浓度会导致营养去除率降低。生物除磷和反硝化是必不可少的反应，因为化学需氧量是必不可少的。对于生物同时除氮和除磷系统，多磷酸盐累积生物（PAO）和非聚磷酸盐累积反硝化剂之间在化学需氧量利用方面的竞争问题是不可避免的。从有效利用有限的进水COD的角度来看，反硝化除磷生物（DN-PAOs）可以对其进行有效利用。在这项研究中，比较了改性UCT（脱硝前工艺）和DEPHANOX（脱硝后工艺）废水处理中DN-PAOs的活性。总之，与传统的预脱硝系统相比，后脱硝系统可以更有效地利用进水COD，并具有更高的养分去除效率。

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