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首页> 外文期刊>Bioprocess and Biosystems Engineering >Calibration and validation of an activated sludge model for greenhouse gases no. 1 (ASMG1): prediction of temperature-dependent N_2O emission dynamics
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Calibration and validation of an activated sludge model for greenhouse gases no. 1 (ASMG1): prediction of temperature-dependent N_2O emission dynamics

机译：温室气体活性污泥模型的校准和验证1（ASMG1）：预测温度相关的N_2O排放动力学

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An activated sludge model for greenhouse gases no. 1 was calibrated with data from a wastewater treatment plant (WWTP) without control systems and validated with data from three similar plants equipped with control systems. Special about the calibration/validation approach adopted in this paper is that the data are obtained from simulations with a mathematical model that is widely accepted to describe effluent quality and operating costs of actual WWTPs, the Benchmark Simulation Model No. 2 (BSM2). The calibration also aimed at fitting the model to typical observed nitrous oxide (N_2O) emission data, i.e., a yearly average of 0.5 % of the influent total nitrogen load emitted as N_2O-N. Model validation was performed by challenging the model in configurations with different control strategies. The kinetic term describing the dissolved oxygen effect on the denitrification by ammonia-oxidizing bacteria (AOB) was modified into a Haldane term. Both original and Haldane-modified models passed calibration and validation. Even though their yearly averaged values were similar, the two models presented different dynamic N_2O emissions under cold temperature conditions and control. Therefore, data collected in such situations can potentially permit model discrimination. Observed seasonal trends in N_2O emissions are simulated well with both original and Haldane-modified models. A mechanistic explanation based on the temperature-dependent interaction between heterotrophic and autotrophic N_2O pathways was provided. Finally, while adding the AOB denitrification pathway to a model with only heterotrophic N_2O production showed little impact on effluent quality and operating cost criteria, it clearly affected N_2O emission productions.
机译：温室气体的活性污泥模型1是用不带控制系统的废水处理厂（WWTP）的数据校准的，并用三个装有控制系统的类似工厂的数据进行了验证。本文采用的校准/验证方法的特殊之处在于，数据是使用模拟模型获得的，该数学模型被广泛接受，用于描述实际污水处理厂的污水质量和运行成本，即基准模拟模型2（BSM2）。校准还旨在将模型拟合到典型的观察到的一氧化二氮（N_2O）排放数据，即，以N_2O-N排放的进水总氮负荷的年均0.5％。通过验证具有不同控制策略的配置中的模型来执行模型验证。将描述溶解氧对氨氧化细菌（AOB）的反硝化作用的动力学术语修改为Haldane术语。原始模型和经Haldane修改的模型均通过了校准和验证。即使它们的年平均值相似，这两个模型在低温条件和控制下仍呈现出不同的动态N_2O排放。因此，在这种情况下收集的数据可能会导致模型区分。原始模型和Haldane修改模型都很好地模拟了观测到的N_2O排放的季节性趋势。基于异养和自养N_2O途径之间的温度依赖性相互作用的机制解释。最后，虽然将AOB反硝化途径添加到仅具有异养N_2O产生的模型中对废水质量和运行成本标准几乎没有影响，但显然影响了N_2O排放产生。

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