Participation as a Key Aspect for Establishing Wastewater as a Source of Renewable Energy

Kretschmer, Florian; Neugebauer, Georg; Stoeglehner, Gernot; Ertl, Thomas

doi:10.3390/en11113232

Cited by 16 publications

(21 citation statements)

References 53 publications

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“…An important precondition is the spatial fabric and the siting of potential energy consumers and the wastewater treatment plant, an issue of spatial planning. Yet, not only the spatial preconditions or the feasibility of technologies are important success factor for wastewater energy utilization, but also the timely inclusion of all relevant stakeholders in participatory planning processes (Kretschmer et al 2018). Spatial planning can also provide planning processes to facilitate this participation and the negotiation processes in society to develop, adopt and implement planning strategies for the energy transition (Stoeglehner et al 2014).…”

Section: Wastewater Energy Usementioning

confidence: 99%

Integrated spatial and energy planning: a means to reach sustainable development goals

Stoeglehner

2020

Evolut Inst Econ Rev

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Climate protection targets call for a transition towards sustainable energy systems based on energy saving, more energy efficiency and renewable energy sources. The options for energy strategies are highly shaped by local and regional spatial contexts like urban, suburban or rural areas or small towns embedded in rural or suburban areas. Both energy efficiency and renewable energy potentials are determined by these spatial contexts, so taking them into consideration leads to more realistic energy strategies. Therefore, integrated spatial and energy planning is an important field of action in order to reach Sustainable Development Goal 7-clean and affordable energy. In this conceptual paper, the ideas and basic principles of integrated spatial and energy planning are introduced, and it is discussed, how this concept might help not only to reach the energy transition but might also support further sustainable development goals. The paper is based on research results gained from Austrian experiences.

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Section: Wastewater Energy Usementioning

confidence: 99%

Integrated spatial and energy planning: a means to reach sustainable development goals

Stoeglehner

2020

Evolut Inst Econ Rev

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“…However, there are no projects promoting this form of energy saving, making DWHR units unpopular among potential users and investors. Meanwhile, as indicated by Kretschmer et al [29], raising awareness is crucial for the better identification of opportunities for utilizing wastewater for energy purposes. Moreover, in many cases, the supply of these devices on the market is not sufficient, which further impedes the expansion of drain heat recovery systems.The above problems also occur in Poland, consequently wastewater heat recovery systems are applied very rarely.…”

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confidence: 99%

Opportunities and Threats of Implementing Drain Water Heat Recovery Units in Poland

et al. 2019

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In recent years an increase of interest in usage of renewable energy sources as a substitution of fossil fuels is being noticeable. However, the waste heat potential, which can be used as an additional source of energy for heating water in buildings, is being omitted. The sources of this heat can be grey water discharged from such sanitary facilities as showers or washing machines. In response to this issue, we took on the task to define and analyze key factors affecting the development of DWHR (Drain Water Heat Recovery) systems using PESTLE (political, economic, social, technological, legal and environmental) analysis. The strengths and weaknesses of these systems were also identified. The studies were based on CFD (computational fluid dynamics) modeling tools. In the Autodesk Simulation CFD software environment, a DWHR unit was made, which was then analyzed for heat exchange efficiency. The obtained results were the basis for preparing the strategy for the development of Drain Water Heat Recovery systems. It was made using the SWOT/TOWS (strengths, weaknesses, opportunities and threats/threats, opportunities, weaknesses and strengths) method, which precisely orders information and allows presenting the project characteristic in readable way for a recipient. The results of the conducted analysis indicated the lack of acceptance on the part of potential users and the resulting need to promote the use of Drain Water Heat Recovery systems at residential level.

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“…If too many users attempt to exploit a similar scheme in an uncontrolled, unregulated fashion, an excessive wastewater temperature reduction could occur, with a negative impact on WRRF performance, and thus, on all users and on the sewerage system itself. Therefore, a multidisciplinary approach should be followed with all the stakeholders involved when planning extensive heat recovery from wastewater, [29,30].…”

Section: Comparison and Discussionmentioning

confidence: 99%

Energy Recovery from Wastewater: A Study on Heating and Cooling of a Multipurpose Building with Sewage-Reclaimed Heat Energy

et al. 2019

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To achieve technically-feasible and socially-desirable sustainable management of urban areas, new paradigms have been developed to enhance the sustainability of water and its resources in modern cities. Wastewater is no longer seen as a wasted resource, but rather, as a mining ground from which to obtain valuable chemicals and energy; for example, heat energy, which is often neglected, can be recovered from wastewater for different purposes. In this work, we analyze the design and application of energy recovery from wastewater for heating and cooling a building in Brno (Czech Republic) by means of heat exchangers and pumps. The temperature and the flow rate of the wastewater flowing in a sewer located in the proximity of the building were monitored for a one-year period, and the energy requirement for the building was calculated as 957 MWh per year. Two options were evaluated: heating and cooling using a conventional system (connected to the local grid), and heat recovery from wastewater using heat exchangers and coupled heat pumps. The analysis of the scenarios suggested that the solution based on heat recovery from wastewater was more feasible, showing a 59% decrease in energy consumption compared to the conventional solution (respectively, 259,151 kWh and 620,475 kWh per year). The impact of heat recovery from wastewater on the kinetics of the wastewater resource recovery facility was evaluated, showing a negligible impact in both summer (increase of 0.045 • C) and winter conditions (decrease of 0.056 • C).Sustainability 2020, 12, 116 2 of 11 source of different types of energy: electrical energy from bioelectrochemical wastewater treatment processes [7,8], low-head hydroelectric energy [9], biogas from anaerobic digestion [10], renewable fuels from residual sludge processing [11,12], and heat energy [13]. The latter is particularly appealing in the framework of water-energy sustainable urban development; in particular, the heat energy recovery potential from wastewater could possibly be even higher than its recoverable chemical energy potential [14,15], and it does not require biological treatment to be converted into a directly usable form. Waste heat from wastewater is reportedly able to generate electrical energy via a thermoelectric generator [16], but the implementation of this is difficult within an urban context. A more accessible technology is the energy recovery from wastewater using heat exchangers installed directly in the sewage collection system [17]. A heat exchanger is installed in direct contact with the wastewater that serves as a heat source or sink, and is later connected to a heat pump and then to the heating and cooling system of a building situated in close proximity. Temperatures of civil wastewater may be more than 25-27 • C in domestic outflows [18], representing a significant thermal energy source [16]; at the inlet of water treatment plants or water resource recovery facilities (WRRFs), the temperature is far lower (15-25 • C or lower, depending on the climate) [16,19,20], and thus,...

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Participation as a Key Aspect for Establishing Wastewater as a Source of Renewable Energy

Cited by 16 publications

References 53 publications

Integrated spatial and energy planning: a means to reach sustainable development goals

Integrated spatial and energy planning: a means to reach sustainable development goals

Opportunities and Threats of Implementing Drain Water Heat Recovery Units in Poland

Energy Recovery from Wastewater: A Study on Heating and Cooling of a Multipurpose Building with Sewage-Reclaimed Heat Energy

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