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Arnell, M., Miltell, M. & Olsson, G. (2023). Making waves: A vision for digital water utilities. Water Research X, 19, 100170-100170, Article ID 100170.
Öppna denna publikation i ny flik eller fönster >>Making waves: A vision for digital water utilities
2023 (Engelska)Ingår i: Water Research X, ISSN 2589-9147, Vol. 19, s. 100170-100170, artikel-id 100170Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Digitalisation has developed over half a century and is one of the global trends defining society of today and future. Digitalisation is envisioned to help water utilities to become: i) community orientated and digitally integrated with customers and society; ii) digitally transformed end-to-end throughout the value-chain and interconnected between business units; iii) predictive & proactive, utilizing models and applications for control and decision support; iv) visually communicative with customers and society, creating customers aware of the value of water; and financially sustainable by optimal operation (OPEX), and sustainable investments (CAPEX). Digitalisation is a process for business development, where digital solutions are used for automation and innovation. Utilizing the potential of the technological innovation requires a parallel organisational transformation. Any implementation of systems or applications must be motivated in actual needs for the organisation and service delivery. Prior to any digitalisation, identifying issues and areas of improvement is essential. Starting the digital journey, motivating employees, improving the digital culture and creating acceptance of new processes are needed on all levels. Most digital applications require collection, storage, sharing and integrated analysis of large amounts of data. This includes both soft and hard digital infrastructure.

Nationell ämneskategori
Data- och informationsvetenskap
Identifikatorer
urn:nbn:se:ri:diva-63972 (URN)10.1016/j.wroa.2023.100170 (DOI)
Tillgänglig från: 2023-02-13 Skapad: 2023-02-13 Senast uppdaterad: 2023-05-25Bibliografiskt granskad
Bengtsson, S. & Arnell, M. (2023). Optimization of Aeration Diffuser System Design: A Simulation Study. Journal of environmental engineering, 149(4), Article ID 04023003.
Öppna denna publikation i ny flik eller fönster >>Optimization of Aeration Diffuser System Design: A Simulation Study
2023 (Engelska)Ingår i: Journal of environmental engineering, ISSN 0733-9372, E-ISSN 1943-7870, Vol. 149, nr 4, artikel-id 04023003Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The influence of aeration diffuser system design on electricity usage, effluent water quality, and life-cycle cost in biological wastewater treatment was investigated. A plant-wide model was implemented, and simulations were carried out with different process configurations and aeration systems. Model-aided design of new aeration diffuser systems could significantly decrease electricity usage and life-cycle cost while at the same time avoiding negative effects on the treatment performance. The optimum distribution of diffuser systems in tanks in series was found to be influenced by process configuration, volumetric loading rate, temperature, and the internal recirculation flow rate. Compared with a conventional design approach, increasing the number of diffusers, up to a critical point, led to higher energy efficiency and lower life-cycle cost. This was despite an increasing limitation of the minimum airflow rate, leading to dissolved oxygen levels significantly exceeding control targets. Aeration systems optimized by simulations were found to, independently of process configuration, exhibit 20% lower electricity usage and 16%-18% lower life-cycle costs compared with systems designed based on a more conventional approach typically applied in practice.

Nationell ämneskategori
Naturvetenskap
Identifikatorer
urn:nbn:se:ri:diva-63973 (URN)10.1061/joeedu.eeeng-7047 (DOI)2-s2.0-85146938760 (Scopus ID)
Tillgänglig från: 2023-02-13 Skapad: 2023-02-13 Senast uppdaterad: 2023-05-25Bibliografiskt granskad
Neth, M., Mattsson, A., I'Ons, D., Tumlin, S., Arnell, M., Blom, L., . . . Modin, O. (2022). A collaborative planning process to develop future scenarios for wastewater systems. Journal of Environmental Management, 316, Article ID 115202.
Öppna denna publikation i ny flik eller fönster >>A collaborative planning process to develop future scenarios for wastewater systems
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2022 (Engelska)Ingår i: Journal of Environmental Management, ISSN 0301-4797, E-ISSN 1095-8630, Vol. 316, artikel-id 115202Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Wastewater infrastructure has a long lifetime and is subject to changing conditions and demands. When plans are made to upgrade or build new infrastructure, transdisciplinary planning processes and a robust analysis of future conditions are needed to make sustainable choices. Here, we provide a stepwise collaborative planning process in which future scenarios are developed together with local stakeholders and expert groups. The process was implemented at one of the largest wastewater treatment plants (WWTPs) in Scandinavia. With a combination of workshops and the use of a web-based digital tool, future scenarios including flows, pollutant loads, and treatment requirements could be created. Furthermore, sustainability prioritizations affecting the WWTP, were identified. The future scenarios developed for the WWTP in the case study, predict stricter and new regulations, constant or lower future loads and ambiguous future flows. The highest ranked sustainability priority was low resource and energy consumption together with low CO2 footprint. The quantified future scenarios developed in the planning process were used as input to a process model to show the consequences they would have on the WWTP in the case study. Applying this collaborative process revealed future scenarios with many, sometimes conflicting, expectations on future WWTPs. It also highlighted needs for improvements of both the collection system and the WWTP. © 2022 The Authors

Ort, förlag, år, upplaga, sidor
Academic Press, 2022
Nyckelord
Future scenario, Holistic planning, Mathematical modelling, Wastewater treatment systems
Nationell ämneskategori
Vattenbehandling
Identifikatorer
urn:nbn:se:ri:diva-59209 (URN)10.1016/j.jenvman.2022.115202 (DOI)2-s2.0-85129510182 (Scopus ID)
Anmärkning

 Funding text 1: This work was made possible by Gryaab AB and supported by VA-teknik Södra.

Tillgänglig från: 2022-06-10 Skapad: 2022-06-10 Senast uppdaterad: 2023-05-25Bibliografiskt granskad
Flores-Alsina, X., Arnell, M., Corominas, L., Sweetapple, C., Fu, G., Butler, D., . . . Jeppsson, U. (2022). Benchmarking strategies to control GHG production and emissions: Chapter 9. In: Quantification and Modelling of Fugitive Greenhouse Gas Emissions from Urban Water Systems: A report from the IWA Task Group on GHG: (pp. 213-228). IWA Publishing
Öppna denna publikation i ny flik eller fönster >>Benchmarking strategies to control GHG production and emissions: Chapter 9
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2022 (Engelska)Ingår i: Quantification and Modelling of Fugitive Greenhouse Gas Emissions from Urban Water Systems: A report from the IWA Task Group on GHG, IWA Publishing , 2022, s. 213-228Kapitel i bok, del av antologi (Övrigt vetenskapligt)
Abstract [en]

Benchmarking has been a useful tool for unbiased comparison of control strategies in wastewater treatment plants (WWTPs) in terms of effluent quality, operational cost and risk of suffering microbiology-related total suspended solids (TSS) separation problems. This chapter presents the status of extending the original Benchmark Simulation Model No 2 (BSM2) towards including greenhouse gas (GHG) emissions. A mathematical approach based on a set of comprehensive models that estimate all potential on-site and off-site sources of COinf2/inf, CHinf4/inf and Ninf2/infO is presented and discussed in detail. Based upon the assumptions built into the model structures, simulation results highlight the potential undesirable effects on increased GHG emissions when carrying out local energy optimization in the activated sludge section and/or energy recovery in the anaerobic digester. Although off-site COinf2/inf emissions may decrease in such scenarios due to either lower aeration energy requirement or higher heat and electricity production, these effects may be counterbalanced by increased Ninf2/infO emissions, especially since Ninf2/infO has a 300-fold stronger greenhouse effect than COinf2/inf. The reported results emphasize the importance of using integrated approaches when comparing and evaluating (plant-wide) control strategies in WWTPs for more informed operational decision-making. 

Ort, förlag, år, upplaga, sidor
IWA Publishing, 2022
Nyckelord
Carbon footprint, Control strategies, GHG, Modelling, Multi-criteria evaluation, Plant-wide, Sustainability
Nationell ämneskategori
Annan elektroteknik och elektronik
Identifikatorer
urn:nbn:se:ri:diva-62392 (URN)10.2166/9781789060461_213 (DOI)2-s2.0-85145012580 (Scopus ID)9781789060461 (ISBN)9781789060454 (ISBN)
Tillgänglig från: 2023-01-24 Skapad: 2023-01-24 Senast uppdaterad: 2023-05-25Bibliografiskt granskad
Saagi, R., Arnell, M., Wärff, C., Ahlström, M. & Jeppsson, U. (2022). City-wide model-based analysis of heat recovery from wastewater using an uncertainty-based approach. Science of the Total Environment, 820, Article ID 153273.
Öppna denna publikation i ny flik eller fönster >>City-wide model-based analysis of heat recovery from wastewater using an uncertainty-based approach
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2022 (Engelska)Ingår i: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 820, artikel-id 153273Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Around 90% of the energy requirement for urban water systems management is for heating domestic tap water. In addition, the energy content of wastewater is mainly in the form of heat (85%). Hence, there is an obvious interest in recovering a large portion of this heat. However, city-wide scenario analyses that evaluate heat recovery at various locations while considering impacts on wastewater treatment plant (WWTP) performance are currently very limited. This study presents a comprehensive model-based city-wide evaluation considering four different heat recovery locations (appliance, household, precinct and WWTP effluent) for a Swedish city with varying degrees of implementation using an uncertainty-based approach. Results show that heat recovery at the appliance level, with heat exchangers installed at 77% of the showers at domestic households, leads to a mean energy recovery of 127 MWh/day with a 0.25 °C reduction in mean WWTP inlet temperature compared to the default case without heat recovery. The highest mean temperature reduction compared to the default case is 1.5 °C when heat is recovered at the precinct level for 77% of the domestic wastewater flow rate. Finally, the impact on WWTP nitrification capacity is negligible in this case due to its large existing capacity and design. © 2022 The Authors

Ort, förlag, år, upplaga, sidor
Elsevier B.V., 2022
Nyckelord
City-wide modelling, Heat recovery, Uncertainty analysis, Wastewater, Effluents, Heating, Recovery, Waste heat, Wastewater treatment, City-wide modeling, Energy content, Energy requirements, Management IS, Model-based analysis, Systems management, Tap water, Uncertainty, Urban water systems, Waste water treatment plants, article, effluent, energy recovery, flow rate, household, nitrification, waste water treatment plant
Nationell ämneskategori
Vattenteknik
Identifikatorer
urn:nbn:se:ri:diva-58497 (URN)10.1016/j.scitotenv.2022.153273 (DOI)2-s2.0-85123381630 (Scopus ID)
Anmärkning

Funding details: LU 2020/2-32; Funding details: Svenska Forskningsrådet Formas, 942-2016-80; Funding details: Svenskt Vatten, SWWA, 16-106; Funding text 1: The authors acknowledge the financial support provided by the Swedish research council Formas ( 942-2016-80 ), Swedish Water ( 16-106 ), Sweden Water Research , and Tekniska Verken i Linköping for the project HÅVA (‘Sustainability analysis for heat recovery from wastewater’). Tekniska Verken i Linköping is also gratefully acknowledged for their financial support and for supporting measurement campaigns. The computations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC) through the Center for Scientific and Technical Computing at Lund University (LUNARC) under project LU 2020/2-32.; Funding text 2: The authors acknowledge the financial support provided by the Swedish research council Formas (942-2016-80), Swedish Water (16-106), Sweden Water Research, and Tekniska Verken i Link?ping for the project H?VA (?Sustainability analysis for heat recovery from wastewater?). Tekniska Verken i Link?ping is also gratefully acknowledged for their financial support and for supporting measurement campaigns. The computations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC) through the Center for Scientific and Technical Computing at Lund University (LUNARC) under project LU 2020/2-32.

Tillgänglig från: 2022-02-18 Skapad: 2022-02-18 Senast uppdaterad: 2023-05-25Bibliografiskt granskad
Arnell, M., Ahlström, M., Wärff, C., Miltell, M. & Vahidi, A. (2021). Digitalisering av den svenska VA-branschen.
Öppna denna publikation i ny flik eller fönster >>Digitalisering av den svenska VA-branschen
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2021 (Svenska)Rapport (Övrigt vetenskapligt)
Abstract [sv]

Rapporten ska ge VA-branschen en kunskapsbas för arbetet med digitalisering inom vatten och avlopp. Den beskriver potentialen och pekar ut framgångsfaktorer för omställningen. Den tar också upp utmaningar med kompetensförsörjning, datahantering och cybersäkerhet. En inspirationskatalog ger tio exempel på lyckade digitala tillämpningar ur verkligheten.

Abstract [en]

The report provides a knowledge base on the digital transformation in the water industry, its visionand potential. Key success factors are pointed out and challenges with workforce competence,data management and cybersecurity is outlined. A catalogue with ten examples of successful digitalapplications is provided for inspiration.

Förlag
s. 93
Serie
Svenskt vatten rapport ; 2021:21
Nyckelord
Digitalization, water industry, water, wastewater, stormwater, Digitalisering, VA-sektorn, vatten, avlopp, dricksvatten, dagvatten
Nationell ämneskategori
Miljövetenskap
Identifikatorer
urn:nbn:se:ri:diva-58297 (URN)
Anmärkning

Finns att hämta hem som pdf från Vattenbokhandeln. https://vattenbokhandeln.svensktvatten.se/   Projektnummer 19-108. Projektets namn: State of Knowledge – Digitalisering av den svenska VA-sektorn. Projektets finansiering: Svenskt Vatten Utveckling.

Tillgänglig från: 2022-01-21 Skapad: 2022-01-21 Senast uppdaterad: 2023-05-25Bibliografiskt granskad
Kvarnström, E., Arnell, M., Sörelius, H. & Klingberg, J. (2021). Hållbarhetsindex och FN:s hållbarhetsmål: Förslag på vägar framåt för den svenska VA-branschen.
Öppna denna publikation i ny flik eller fönster >>Hållbarhetsindex och FN:s hållbarhetsmål: Förslag på vägar framåt för den svenska VA-branschen
2021 (Svenska)Rapport (Övrigt vetenskapligt)
Abstract [sv]

Rapporten går igenom olika hållbarhetsmål som VA-branschen bör förhålla sig till. Den tar upp VA-organisationers arbete med Svenskt Vattens Hållbarhetsindex (HBI) och hur det förhåller sig till det globala hållbarhetsarbetet via Agenda 2030 och FN:s 17 hållbarhetsmål. HBI täcker in flera av de globala målen, men det finns möjlighet för VA-organisationer att utöka sitt hållbarhetsarbete. Rapporten ger förslag till fördjupat arbete med hållbarhetsfrågor.

Abstract [en]

The report contains a presentation of different sustainability goals that the water and wastewater sector needs to consider. Water utilities’ work in Sweden with sustainability index (HBI) and its relation to the SDGs is shown. HBI is covering several of the SDGs but the water and wastewater sector can both deepen and broaden its sustainability work; suggestions how are given in the report.

Förlag
s. 77
Serie
Svenskt vatten rapport ; 2021:23
Nyckelord
Sustainability, Sustainability Index (HBI), UN sustainable development goals, the Swedish water and wastewater sector, inspirational examples, Hållbarhet, Hållbarhetsindex (HBI), FN:s hållbarhetsmål, Sveriges VA-bransch, inspirationsexempel
Nationell ämneskategori
Miljövetenskap
Identifikatorer
urn:nbn:se:ri:diva-58296 (URN)
Anmärkning

Finns att hämta hem som pdf från Vattenbokhandeln tillsammans med Kartläggningen som är kopplad till rapporten. https://vattenbokhandeln.svensktvatten.se/   Projektnummer 19 - 105. Projektets namn: Hållbarhetsindex, de svenska miljömålen och de globala hållbarhetsmålen – den svenska VAbranschens väg framåt. Projektets finansiering: Svenskt Vatten Utveckling.

Tillgänglig från: 2022-01-21 Skapad: 2022-01-21 Senast uppdaterad: 2023-05-25Bibliografiskt granskad
Saagi, R., Arnell, M., Reyes, D., Wärff, C., Ahlström, M. & Jeppsson, U. (2021). Modelling temperature dynamics in sewer systems – Comparing mechanistic and conceptual modelling approaches. Water Science and Technology, 84(9), 2335-2352
Öppna denna publikation i ny flik eller fönster >>Modelling temperature dynamics in sewer systems – Comparing mechanistic and conceptual modelling approaches
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2021 (Engelska)Ingår i: Water Science and Technology, ISSN 0273-1223, E-ISSN 1996-9732, Vol. 84, nr 9, s. 2335-2352Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The vast majority of the energy consumed for urban water services is used to heat tap water. Heat recovery from wastewater is consequently an area of rapidly growing concern, both in research and by commercial interest, promoting the path towards a circular economy. To facilitate a system-wide evaluation of heat recovery from wastewater, this paper compares two one-dimensional models (mechanistic and conceptual) that can describe wastewater temperature dynamics in sewer pipe systems. The models are applied to successfully predict downstream wastewater temperature for sewer stretches in two Swedish cities (Linköping and Malmö). The root mean squared errors for the mechanistic model (Linköping Dataset1 – 0.33 °C; Linköping Dataset2 – 0.28 °C; Malmö – 0.40 °C) and the conceptual model (Linköping Dataset1 – 0.32 °C; Linköping Dataset2 – 0.20 °C; Malmö – 0.44 °C) indicate that both models have similar predictive capabilities, encouraging the use of conceptual models to reduce data requirements and model calibration efforts. Both models are freely distributed and can be easily integrated with wastewater generation and treatment models to facilitate system-wide wastewater temperature dynamics analysis. © 2021 The Authors.

Ort, förlag, år, upplaga, sidor
IWA Publishing, 2021
Nyckelord
Heat recovery, Heat transfer, Modelling, Sewer system, Temperature dynamics, Dynamics, Sewers, Waste heat, Wastewater treatment, Conceptual model, Energy, Mechanistic models, Model temperatures, Modeling, Modeling approach, Urban water services, Wastewater temperature, Mean square error, calibration, data, model, temperature, wastewater, article, city, energy recovery, sewer
Nationell ämneskategori
Vattenteknik
Identifikatorer
urn:nbn:se:ri:diva-57338 (URN)10.2166/wst.2021.425 (DOI)2-s2.0-85120440444 (Scopus ID)
Anmärkning

Funding details: Svenska Forskningsrådet Formas, 942-2016-80; Funding details: Svenskt Vatten, SWWA, 16-106; Funding text 1: The authors acknowledge the financial support provided by Swedish research council Formas (942-2016-80), The Swedish Water and Wastewater Association (16-106) and Sweden Water Research for the project HÅVA (‘Sustainability analysis for heat recovery from wastewater’). VA Syd (Malmö) and Tekniska Verken (Linköping) are also gratefully acknowledged for their financial support, providing various details about the sewer network and supporting measurement campaigns.

Tillgänglig från: 2021-12-23 Skapad: 2021-12-23 Senast uppdaterad: 2023-05-25Bibliografiskt granskad
Arnell, M., Ahlström, M., Wärff, C., Saagi, R. & Jeppsson, U. (2021). Plant-wide modelling and analysis of WWTP temperature dynamics for sustainable heat recovery from wastewater. Water Science and Technology, 84(4), 1023-1036
Öppna denna publikation i ny flik eller fönster >>Plant-wide modelling and analysis of WWTP temperature dynamics for sustainable heat recovery from wastewater
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2021 (Engelska)Ingår i: Water Science and Technology, ISSN 0273-1223, E-ISSN 1996-9732, Vol. 84, nr 4, s. 1023-1036Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Wastewater heat recovery upstream of wastewater treatment plants (WWTP) poses a risk to treatment performance, i.e. the biological processes. In order to perform a sustainability analysis, a detailed prediction of the temperature dynamics over the WWTP is needed. A comprehensive set of heat balance equations was included in a plant-wide process model and validated for the WWTP in Linköping, Sweden, to predict temperature variations over the whole year in a temperate climate. A detailed model for the excess heat generation of biological processes was developed. The annual average temperature change from influent to effluent was 0.78°C with clear seasonal variations, wherein 45% of the temperature change arose from processes other than the activated sludge unit. To address this, plant-wide energy modelling was necessary to predict in-tank temperature in the biological treatment steps. The energy processes with the largest energy gains were solar radiation and biological processes, while the largest losses were from conduction, convection, and atmospheric radiation. Tanks with large surface areas showed a significant impact on the heat balance regardless of biological processes. Simulating a 3°C lower influent temperature, the temperature in the activated sludge unit dropped by 2.8°C, which had a negative impact on nitrogen removal

Ort, förlag, år, upplaga, sidor
IWA Publishing, 2021
Nyckelord
Energy and heat balance, Mathematical modelling, Resource recovery, Temperature, Wastewater heat recovery, Wastewater treatment plant, activated sludge, biological method, climate prediction, heat balance, performance assessment, seasonal variation, solar radiation, Sweden
Nationell ämneskategori
Vattenteknik
Identifikatorer
urn:nbn:se:ri:diva-56693 (URN)10.2166/wst.2021.277 (DOI)2-s2.0-85114170209 (Scopus ID)
Anmärkning

 Funding details: Svenska Forskningsrådet Formas, 942-2016-80; Funding details: Svenskt Vatten, SWWA, 16-106; Funding text 1: The authors acknowledge the financial support provided by the Swedish research council Formas (942-2016-80), The Swedish Water and Wastewater Association (16-106), Sweden Water Research, Käppalaförbundet and Tekniska Verken in Linköping for the project HÅVA (‘Sustainability analysis for heat recovery from wastewater’). Tekniska Verken in Linköping, is also gratefully acknowledged for their financial support and for supporting measurement campaigns.; Funding text 2: The authors acknowledge the financial support provided by the Swedish research council Formas (942-2016-80), The Swedish Water and Wastewater Association (16-106), Sweden Water Research, K?ppalaf?rbundet and Tekniska Verken in Link?ping for the project H?VA ('Sustainability analysis for heat recovery from wastewater'). Tekniska Verken in Link?ping, is also gratefully acknowledged for their financial support and for supporting measurement campaigns.

Tillgänglig från: 2021-09-28 Skapad: 2021-09-28 Senast uppdaterad: 2023-05-25Bibliografiskt granskad
Arnell, M., Saagi, R., Wärff, C., Ahlström, M. & Jeppsson, U. (2021). Värmeåtervinning ur avloppsvatten: Energiåtervinning och påverkan på avloppssystemet.
Öppna denna publikation i ny flik eller fönster >>Värmeåtervinning ur avloppsvatten: Energiåtervinning och påverkan på avloppssystemet
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2021 (Svenska)Rapport (Övrigt vetenskapligt)
Abstract [sv]

Uppvärmning av tappvarmvatten utgör lejonparten av den totala energianvändningen i den urbana vattencykeln, upp till 90 procent. Uppskattningar visar att 780 till 1 150 kWh per person och år används i svenska hushåll i form av varmvatten. Denna energi hamnar huvudsakligen i avloppsvattnet. Variationerna i varmvattenanvändning är stora och det går att göra besparingar på brukarnivå. Ändå finns det stor potential för energieffektivisering genom värmeåtervinning ur avloppsvatten med värmeväxlare och värmepumpar.

Abstract [en]

Heating of tap water makes up the lion share of the total energy used in the urban water cycle, up to 90 %. Estimates show that 780 to 1,150 kWh per person and year is used in Sweden for heating water. This energy mainly ends up in the sewers. Even if variations in energy use for this purpose are large and savings are possible, wastewater heat recovery, using heat exchangers or heat pumps, has a large potential.

Förlag
s. 61
Serie
Svenskt vatten rapport ; 2021:26
Nyckelord
Energy balance, mathematical modelling, simulation, resource recovery, temperature dynamics, wastewater heat recovery, wastewater treatment plant, Energibalans, matematisk modellering, simulering, resursåtervinning, temperaturdynamik, värmeåtervinning från avloppsvatten, avloppsreningsverk
Nationell ämneskategori
Energiteknik
Identifikatorer
urn:nbn:se:ri:diva-58295 (URN)
Anmärkning

Finns att hämta hem som pdf från Vattenbokhandeln. https://vattenbokhandeln.svensktvatten.se/. 

Projektnummer 16-106. Projektets namn: Hållarhetsanalys av värmeåtervinning ur avloppsvatten (HÅVA). Projektetsfinansiering: Svenskt Vatten Utveckling, FORMAS, Sweden Water Research, Käppalaförbundet, Tekniska Verken iLinköping, AB Stångåstaden

Tillgänglig från: 2022-01-21 Skapad: 2022-01-21 Senast uppdaterad: 2023-05-25Bibliografiskt granskad
Organisationer
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0003-1547-8413

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