The heat recovery potential of ‘wastewater’: a national analysis of sewage effluent discharge temperatures

Wilson, Miles; Worrall, Fred

doi:10.1039/d1ew00411e

Cited by 15 publications

(7 citation statements)

References 27 publications

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“…For larger amounts of wastewater, a heat pump application is necessary [11]. The lower source of energy for this device can be greywater [12], raw sewage transported by sewage collectors and flowing through the technological facilities of the sewage treatment plant [13,14], as well as treated sewage flowing towards the receiver [15]. Industrial wastewater can also be used as a heat source [16].…”

Section: Introductionmentioning

confidence: 99%

Horizontal Shower Heat Exchanger as an Effective Domestic Hot Water Heating Alternative

Kordana-Obuch

Starzec

2022

Energies

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Wastewater has significant potential as a source of clean energy. This energy can be used both within external sewer networks and on the scale of individual residential buildings, and the use of shower heat exchangers appears to be the most reasonable solution. However, in the case of Poland, the problem is still the unwillingness of society to use this type of solution, caused mainly by the lack of space for the installation of vertical drain water heat recovery (DWHR) units and the low efficiency of horizontal units. In response to this issue, the efficiency of a new compact shower heat exchanger designed to be mounted below the shower tray, as well as its linear counterpart, was investigated under various operating conditions. In addition, the financial efficiency of using the compact DWHR unit with average water consumption for showering was evaluated. For this purpose, discount methods were used to estimate the financial efficiency of investments. The study showed that the compact shower heat exchanger has higher efficiency than its linear counterpart. Depending on the temperature of cold water and the flow rate of both media through the heat exchanger, it achieves efficiencies ranging from 22.43% to 31.82%, while the efficiency of the linear DWHR unit did not exceed 23.03% in the study. The financial analysis showed that its use is particularly beneficial when the building uses an electric hot water heater. The investment’s sensitivity to changes in the independent variables is small in this case, even with low water consumption per shower. The only exceptions are investment outlays. Therefore, the compact DWHR unit is a clean energy device, which in many cases is financially viable.

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Section: Introductionmentioning

confidence: 99%

Horizontal Shower Heat Exchanger as an Effective Domestic Hot Water Heating Alternative

Kordana-Obuch

Starzec

2022

Energies

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“…Especially given that summer water temperatures during low flow conditions exceeded 20 ; temperatures which can affect the recruitment success of salmonids such as brown trout, Salmo trutta , and European grayling, Thymallus thymallus 55 . Wastewater treatment works are a source of warm water that has received little attention to date, but a UK-national-scale analysis by 56 have shown that there is potential to recover heat from wastewater treatment works to help meet climate change targets, with the additional benefit of reducing environmental impacts on rivers. Our analysis indicates that a mitigation option such as heat recovery from treated effluent discharge may benefit chalk streams, such as the River Chess, which receive high proportions of their flow from treated effluent.…”

Section: Discussionmentioning

confidence: 99%

Machine learning approach towards explaining water quality dynamics in an urbanised river

Schäfer

Beck

Rhys

et al. 2022

Sci Rep

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Human activities alter river water quality and quantity, with consequences for the ecosystems of urbanised rivers. Quantifying the role of human-induced drivers in controlling spatio-temporal patterns in water quality is critical to develop successful strategies for improving the ecological health of urban rivers. Here, we analyse high-frequency electrical conductivity and temperature data collected from the River Chess in South-East England during a Citizen Science project. Utilizing machine learning, we find that boosted trees outperform GAM and accurately describe water quality dynamics with less than 1% error. SHapley Additive exPlanations reveal the importance of and the (inter)dependencies between the individual variables, such as river level and Wastewater Treatment Works (WWTW) outflow. WWTW outflows give rise to diurnal variations in electrical conductivity, which are detectable throughout the year, and to an increase in average water temperature of 1 $$\rm{^o}C$$ o C in a 2 km reach downstream of the wastewater treatment works during low flows. Overall, we showcase how high-frequency water quality measurements initiated by a Citizen Science project, together with machine learning techniques, can help untangle key drivers of water quality dynamics in an urbanised chalk stream.

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“…Вибір такого прикладу обумовлений тим, що каналізаційні стоки є найпотужнішим джерелом відновлювальної енергії в умовах мегаполісів. Наприклад, за оцінками до 6,1 % потреб Великобританії в теплі можна задовольнити шляхом рекуперації тепла стічних вод тільки в Англії [146].…”

Section: можливості застосування відновлювальних джерел енергії в цен...unclassified

Системи Централізованого Теплопостачання З Інтеграцією Відновлювальних Джерел Енергії

2023

MEC

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Проведено аналіз сучасного стану систем централізованого теплопостачання України, типового обладнання централізованих теплових пунктів та індивідуальних теплових пунктів. Зроблено аналіз провідного світового досвіду створення технологій та реалізації заходів для підвищення енергоефективності у сфері централізованого теплопостачання будинків, особливості четвертого та п'ятого покоління систем теплопостачання, проведено аналіз перспектив застосування цих технологій в Україні.Для науковців, викладачів, докторантів, аспірантів і студентів закладів вищої освіти.

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The heat recovery potential of ‘wastewater’: a national analysis of sewage effluent discharge temperatures

Abstract: Final sewage effluent (FSE) is typically warmer than the rivers it is often discharged to. The excess heat energy could be recovered and utilised to help meet climate change targets....

Cited by 15 publications

References 27 publications

Horizontal Shower Heat Exchanger as an Effective Domestic Hot Water Heating Alternative

Horizontal Shower Heat Exchanger as an Effective Domestic Hot Water Heating Alternative

Machine learning approach towards explaining water quality dynamics in an urbanised river

Системи Централізованого Теплопостачання З Інтеграцією Відновлювальних Джерел Енергії

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