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Modelling of a pulp mill wastewater treatment plant for improving its performance on phosphorus removal
Process Safety and Environmental Protection ( IF 7.8 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.psep.2020.08.029
S. Bentancur , C.M. López-Vázquez , H.A. García , M. Duarte , D. Travers , D. Brdjanovic

Abstract The performance of a pulp mill wastewater treatment plant (WWTP) was assessed by mathematical modelling using the software BioWin aiming at providing alternatives for reducing even further the phosphorus (P) concentration in the treated effluent. The WWTP was designed without nutrient removal capacities, since pulp and paper wastewater is usually deficient in nutrients. However, the hard wood (Eucalyptus) which is processed in such plant has a higher P content compared to other types of woods, and part of that P ended up in the raw wastewater to be treated. The wastewater was characterized following the Dutch STOWA protocol. Once the model was calibrated, historical data from different periods of time was used to validate the model. The model was capable of describing the current plant operation, as well as its historical performance. Moreover, the model was used to evaluate different potential upgrading scenarios for the treatment plant aiming at increasing the plant performance on P removal. According to the model, the implementation of an anaerobic phase prior to the aerobic process showed to be a feasible scenario contributing to decrease the total phosphorus (TP) concentration in the treated effluent in approximately a 58 %. In addition, applying chemical precipitation can further decrease the TP concentration below 0.1 mg/L. However, further research activities such as pilot-testing may be needed to validate the previous recommendations of applying enhance biological and chemical P removal at such pulp mill wastewater treatment plant.

中文翻译:

纸浆厂废水处理厂的建模以提高其除磷性能

摘要 纸浆厂废水处理厂 (WWTP) 的性能通过使用 BioWin 软件的数学建模进行评估,旨在为进一步降低处理后的污水中的磷 (P) 浓度提供替代方案。污水处理厂的设计没有去除营养物质的能力,因为纸浆和造纸废水通常缺乏营养物质。然而,与其他类型的木材相比,在这种工厂加工的硬木(桉树)的磷含量更高,并且部分磷最终进入待处理的原废水中。按照荷兰 STOWA 协议对废水进行表征。一旦模型被校准,来自不同时间段的历史数据被用于验证模型。该模型能够描述当前的工厂运营及其历史性能。此外,该模型用于评估处理厂的不同潜在升级方案,旨在提高工厂的除磷性能。根据该模型,在好氧过程之前实施厌氧阶段表明是一种可行的方案,有助于将处理后的污水中的总磷 (TP) 浓度降低约 58%。此外,应用化学沉淀可以进一步将 TP 浓度降低到 0.1 mg/L 以下。然而,可能需要进一步的研究活动,如试点测试,以验证先前在此类纸浆厂废水处理厂应用增强生物和化学除磷的建议。该模型用于评估处理厂的不同潜在升级方案,旨在提高工厂的除磷性能。根据该模型,在好氧过程之前实施厌氧阶段表明是一种可行的方案,有助于将处理后的污水中的总磷 (TP) 浓度降低约 58%。此外,应用化学沉淀可以进一步将 TP 浓度降低到 0.1 mg/L 以下。然而,可能需要进一步的研究活动,如试点测试,以验证先前在此类纸浆厂废水处理厂应用增强生物和化学除磷的建议。该模型用于评估处理厂的不同潜在升级方案,旨在提高工厂的除磷性能。根据该模型,在好氧过程之前实施厌氧阶段表明是一种可行的方案,有助于将处理后的污水中的总磷 (TP) 浓度降低约 58%。此外,应用化学沉淀可以进一步将 TP 浓度降低到 0.1 mg/L 以下。然而,可能需要进一步的研究活动,如试点测试,以验证先前在此类纸浆厂废水处理厂应用增强生物和化学除磷的建议。在好氧过程之前实施厌氧阶段表明是一种可行的方案,有助于将处理后的污水中的总磷 (TP) 浓度降低约 58%。此外,应用化学沉淀可以进一步将 TP 浓度降低到 0.1 mg/L 以下。然而,可能需要进一步的研究活动,如试点测试,以验证先前在此类纸浆厂废水处理厂应用增强生物和化学除磷的建议。在好氧过程之前实施厌氧阶段表明是一种可行的方案,有助于将处理后的污水中的总磷 (TP) 浓度降低约 58%。此外,应用化学沉淀可以进一步将 TP 浓度降低到 0.1 mg/L 以下。然而,可能需要进一步的研究活动,如试点测试,以验证先前在此类纸浆厂废水处理厂应用增强生物和化学除磷的建议。
更新日期:2021-02-01
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