A modified Activated Sludge Model No. 3 (ASM3) with two-step nitrification-denitrification
A modified Activated Sludge Model No. 3 (ASM3) with two-step nitrification-denitrification
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DOI：
10.1016/j.envsoft.2006.05.009
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发表时间：
2007-06-01
影响因子：
4.9
通讯作者：
Giusti, Elisabetta
中科院分区：
文献类型：
--
作者：
Iacopozzi, Ilenia;Innocenti, Valentina;Giusti, Elisabetta
活性污泥模型 (ASM) 的常见局限性 [Henze, M.、Gujer, W.、Mino, T.、van Loosdrecht, M.C.M., 2000。活性污泥模型 ASM1、ASM2、ASM2d 和 ASM3。 IWA 科学技术报告第 9 号。IWA 出版，伦敦，英国] 描述了作为单步过程的硝化动力学以及随后仅对硝酸盐进行的反硝化作用。这种普遍承认的简化可能代表亚硝酸盐在特定应用中变得重要的严重限制，无论是作为目标最终产品还是不需要的中间体。本文提出了对基本 ASM3 模型的增强，引入了过程硝化的两步模型，因此考虑了亚硝酸盐和硝酸盐的反硝化。在介绍了相关的过程动力学并相应地调整了化学计量矩阵后，参考基准设置描述了Matlab/Simulink（TM）平台中的模型实现。为了实现快速实施，工艺单元（反应罐和二级沉降器）已实现为链接到 Simulink 模块的 DLL，而用户仍然可以访问模型参数和化学计量矩阵。将新模型与标准 ASM3 进行比较，并检查一致性和质量守恒。还表明，在默认动力学参数下，亚硝酸盐可能占硝化废水的相当大一部分，从而揭示了基准尺寸的设计限制。在最后一部分中，尝试对基准工厂体积进行优化，以尽量减少此类违规，从而导致总体反应体积适度增加。相关软件可免费用于研究目的。 (c) 2006 Elsevier Ltd. 保留所有权利。
A common limitation of the Activated Sludge Models (ASM) [Henze, M., Gujer, W., Mino, T., van Loosdrecht, M.C.M., 2000. Activated Sludge Models ASM1, ASM2, ASM2d, and ASM3. IWA Scientific and Technical Report No. 9. IWA Publishing, London, UK] is the representation of the nitrification dynamics as a single-step process and the consequent denitrification on nitrate alone. This generally acknowledged simplification may represent a serious limitation in specific applications where nitrites become important, either as a target final product or an unwanted intermediate. This paper proposes an enhancement to the basic ASM3 model, introducing a two-step model for the process nitrification and, consequently, considering denitrification on both nitrite and nitrate. After introducing the relevant process kinetics and adapting the stoichiometric matrix accordingly, the model implementation in the Matlab/Simulink (TM) platform is described with reference to the benchmark setting. To obtain a fast implementation, the process units (reaction tanks and secondary settler) have been implemented as DLLs linked to the Simulink blocks, whereas the model parameters and stoichiometric matrix remain accessible to the user. The new model is compared with the standard ASM3 and checked for consistency and mass conservation. It is also shown that with the default kinetic parameters nitrite may represent a considerable fraction of the nitrified effluent, thus revealing a design limitation in the benchmark sizing. In the last part, an optimization of the benchmark plant volumes has been attempted in order to minimize such violations, resulting in a moderate increase of the overall reaction volume. The pertinent software is freely available for research purposes. (c) 2006 Elsevier Ltd. All rights reserved.