Model-based assessment of in-sewer heat recovery potentials considering wastewater treatment-specific temperature limits

Dirk Muschalla, W. Sprung, Stefan Reinstaller, Markus Pichler, F. Kretschmer
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Abstract

Due to the ongoing climate and energy crisis, wastewater is becoming increasingly important as a source of renewable energy. In urban areas, heat recovery from the sewer is considered a promising approach, as the locations of supply and demand are close to each other. In this context, it is crucial that negative impacts on temperature-sensitive processes in the downstream wastewater treatment plant are strictly avoided. To support the necessary planning and authorization, this paper presents a model-based approach to assess the thermal energy level of the wastewater at any given location in the sewer, taking into account the influent temperature constraints of the wastewater treatment plant. The entire modelling is based on the open-source software SWMM 5, which was extended by a temperature model. The concept showed its practicability and informative value during a full-scale field application in the sewer systems of the Austrian city of Graz. All modelling is based on freely available software, which makes the approach easy transferable to other cities with comparable infrastructural boundary conditions.
基于模型的污水热回收潜力评估,考虑到废水处理的特定温度限制
由于持续的气候和能源危机,废水作为一种可再生能源正变得越来越重要。在城市地区,从下水道回收热量被认为是一种很有前景的方法,因为供需双方的位置很近。在这种情况下,必须严格避免对下游污水处理厂中对温度敏感的工艺产生负面影响。为了支持必要的规划和授权,本文提出了一种基于模型的方法,用于评估下水道中任何给定位置的废水热能水平,同时考虑到废水处理厂的进水温度限制。整个建模基于开源软件 SWMM 5,并通过温度模型进行了扩展。在奥地利格拉茨市下水道系统的全面实地应用中,这一概念显示了其实用性和信息价值。所有建模都是基于免费提供的软件,这使得该方法可以很容易地移植到具有类似基础设施边界条件的其他城市。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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