Change search
Link to record
Permanent link

Direct link
BETA
Publications (10 of 27) Show all publications
Bengtsson, S., Fujii, D., Arnell, M., Andersson, S., Carlsson, B., Held, H. & Gustavsson, D. (2019). Effektiv luftning: Design, drift, underhåll och upphandling av luftningsutrustning för kommunala avloppsre-ningsverk. Bromma, Sverige
Open this publication in new window or tab >>Effektiv luftning: Design, drift, underhåll och upphandling av luftningsutrustning för kommunala avloppsre-ningsverk
Show others...
2019 (Swedish)Report (Other academic)
Alternative title[en]
Efficient aeration : Design, operation, maintenance and procurement of aeration equipment for municipal wastewater treatment plants
Abstract [sv]

Rapporten beskriver luftning vid kommunala avloppsreningsverk med fokus på energieffektivitet. Den tar upp design av luftningsanläggningar samt lämpliga metoder för styrning, drift, uppföljning och underhåll − med exempel från verkligheten och modellsimuleringar. Rapporten ger också vägledning för upphandling av luftningsanläggningen.

Abstract [en]

In this report, aeration at municipal wastewater treatment plants is described with focus on energy efficiency. Design of aeration systems is described as well as methods for control, operation, follow-up and maintenance with real examples and model simulations. Guidance for procurement of aeration systems is also provided.

Place, publisher, year, edition, pages
Bromma, Sverige: , 2019. p. 270
Series
SVU ; 2019-23
Keywords
Energy efficiency, aeration, diffusers, blowers, procurement, Energieffektivitet, luftning, luftare, blåsmaskiner, upphandling
National Category
Water Treatment
Identifiers
urn:nbn:se:ri:diva-42438 (URN)
Available from: 2019-12-30 Created: 2019-12-30 Last updated: 2020-01-07Bibliographically approved
Amaral, A., Gillot, S., Garrido-Baserba, M., Filali, A., Karpinska, A., Plósz, B., . . . Rosso, D. (2019). Modelling gas-liquid mass transfer in wastewater treatment: when current knowledge needs to encounter engineering practice and vice versa. Water Science and Technology, 80(4), 607-619
Open this publication in new window or tab >>Modelling gas-liquid mass transfer in wastewater treatment: when current knowledge needs to encounter engineering practice and vice versa
Show others...
2019 (English)In: Water Science and Technology, ISSN 0273-1223, E-ISSN 1996-9732, Vol. 80, no 4, p. 607-619Article in journal (Refereed) Published
Abstract [en]

Gas-liquid mass transfer in wastewater treatment processes has received considerable attention over the last decades from both academia and industry. Indeed, improvements in modelling gas-liquid mass transfer can bring huge benefits in terms of reaction rates, plant energy expenditure, acid-base equilibria and greenhouse gas emissions. Despite these efforts, there is still no universally valid correlation between the design and operating parameters of a wastewater treatment plant and the gas-liquid mass transfer coefficients. That is why the current practice for oxygen mass transfer modelling is to apply overly simplified models, which come with multiple assumptions that are not valid for most applications. To deal with these complexities, correction factors were introduced over time. The most uncertain of them is the α-factor. To build fundamental gas-liquid mass transfer knowledge more advanced modelling paradigms have been applied more recently. Yet these come with a high level of complexity making them impractical for rapid process design and optimisation in an industrial setting. However, the knowledge gained from these more advanced models can help in improving the way the α-factor and thus gas-liquid mass transfer coefficient should be applied. That is why the presented work aims at clarifying the current state-of-the-art in gas-liquid mass transfer modelling of oxygen and other gases, but also to direct academic research efforts towards the needs of the industrial practitioners.

Place, publisher, year, edition, pages
NLM (Medline), 2019
Keywords
oxygen, gas, theoretical model, uncertainty, waste water, Gases, Models, Theoretical
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-40889 (URN)10.2166/wst.2019.253 (DOI)2-s2.0-85074272029 (Scopus ID)
Available from: 2019-11-26 Created: 2019-11-26 Last updated: 2020-01-17Bibliographically approved
Wärff, C., Arnell, M., Jeppsson, U. & Sehlén, R. (2019). Modelling heat recovery potential from household wastewater. In: Proceedings of 10th IWA Symposium on Modelling and Integrated Assessment: . Paper presented at 10th IWA Symposium on Modelling and Integrated Assessment (Watermatex 2019), Copenhagen, Denmark.
Open this publication in new window or tab >>Modelling heat recovery potential from household wastewater
2019 (English)In: Proceedings of 10th IWA Symposium on Modelling and Integrated Assessment, 2019Conference paper, Published paper (Refereed)
Abstract [en]

There is a strongly growing interest for wastewater heat recovery (WWHR) in Sweden and elsewhere, but a lack of adequate tools to determine downstream impacts due to the associated temperature drop. The heat recovery potential and associated temperature drop after heat recovery on a building level is modelled for a case study in Linköping, Sweden. The maximum temperature drop reaches 4.2 °C, with an annual recovered heat of 0.65 kWh/person/day. Wastewater temperature out from the heat exchanger was 18.0 °C in winter at the lowest. The drinking water source type can be an important factor when considering wastewater heat recovery.

Keywords
wastewater; heat recovery; heat demand; energy use; heat exchanger; modelling
National Category
Water Treatment
Identifiers
urn:nbn:se:ri:diva-42437 (URN)
Conference
10th IWA Symposium on Modelling and Integrated Assessment (Watermatex 2019), Copenhagen, Denmark
Available from: 2019-12-30 Created: 2019-12-30 Last updated: 2020-01-07Bibliographically approved
Saagi, R., Arnell, M., Reyes, D., Sehlén, R. & Jeppsson, U. (2019). Modelling heat transfer in sewer systems - towards a city-wide model for heat recovery from wastewater. In: Proceedings of 10th IWA Symposium on Modelling and Integrated Assessment: . Paper presented at 10th IWA Symposium on Modelling and Integrated Assessment (Watermatex 2019), Copenhagen, Denmark.
Open this publication in new window or tab >>Modelling heat transfer in sewer systems - towards a city-wide model for heat recovery from wastewater
Show others...
2019 (English)In: Proceedings of 10th IWA Symposium on Modelling and Integrated Assessment, 2019Conference paper, Published paper (Refereed)
Abstract [en]

Majority of the energy consumed for urban water services is used to heat tap water. In order to allow for a system-wide evaluation of heat recovery possibilities from wastewater, this paper presents a one-dimensional model that can describe temperature and flow rate variations in a sewer pipe. The model is applied to successfully predict downstream wastewater temperature for sewer stretches in two Swedish cities (Linköping, Malmö). The model can be used to study various heat recovery possibilities from wastewater. It can be easily integrated with models developed to generate flow rate and temperature profiles from households as well as standard activated sludge models for modelling wastewater treatment plants so that a system-wide heat recovery study can be made possible.

Keywords
heat transfer; sewer system; heat recovery; modelling, simulation
National Category
Water Treatment
Identifiers
urn:nbn:se:ri:diva-42436 (URN)
Conference
10th IWA Symposium on Modelling and Integrated Assessment (Watermatex 2019), Copenhagen, Denmark
Available from: 2019-12-30 Created: 2019-12-30 Last updated: 2020-01-07Bibliographically approved
Kazadi Mbamba, C., Arnell, M., Svedin, C., Ejlertsson, J., Jeppsson, U. & Karlsson, A. (2019). Modelling Industrial Symbiosis of BiogasProduction and Industrial WastewaterTreatment Plants – A Review. Linköping, Sweden
Open this publication in new window or tab >>Modelling Industrial Symbiosis of BiogasProduction and Industrial WastewaterTreatment Plants – A Review
Show others...
2019 (English)Report (Other academic)
Abstract [en]

The present-day treatment of pulp and paper mill effluents can be significantly improvedby incorporating biogas production in the context of industrial symbiosis. In this work anew industrial symbiosis concept is presented, the focus being on modelling it in view ofprocess optimization, design improvement and adoption by the pulp and paper industry.The concept consists of a first stage in which pulp and paper mills effluents are treatedby high-rate anaerobic digestion in external circulation sludge bed (ECSB) reactors toproduce biogas. In the second stage the removal of organic matter contained in thedigestate stream occurs through aerobic activated sludge treatment, aiming to achievemaximum sludge production with minimum aeration requirements. This sludge shouldin the case study then be co-digested with fish-waste silage to yield methane for energyproduction, nutrients-rich reject water that can be recycled to the activated sludgetreatment for optimum microbial activities and, production of nutrient rich soilamendment. The overall research aim is to develop a mathematical model that describesthe relevant process units and the dynamics of the different processes involving organicmatter removal, biogas production and nutrients release. The review overall finds thatan integrated model is required to simulate this concept and should include recentdevelopments in activated sludge, anaerobic digestion and physico-chemical modelling.

Place, publisher, year, edition, pages
Linköping, Sweden: , 2019. p. 39
Series
RISE Rapport ; 2019:48
Keywords
biogas, industrial symbiosis, granular sludge bed reactors, anaerobic digestion, high-rate activated sludge system, modelling
National Category
Water Treatment
Identifiers
urn:nbn:se:ri:diva-39233 (URN)978-91-88907-75-2 (ISBN)
Funder
Vinnova, 2017-03205
Available from: 2019-06-27 Created: 2019-06-27 Last updated: 2019-07-01Bibliographically approved
Regmi, P., Miller, M., Jimenez, J., Stewart, H., Johnson, B., Amerlinck, Y., . . . Takács, I. (2019). The future of WRRF modelling - Outlook and challenges. Water Science and Technology, 79(1), 3-14
Open this publication in new window or tab >>The future of WRRF modelling - Outlook and challenges
Show others...
2019 (English)In: Water Science and Technology, ISSN 0273-1223, E-ISSN 1996-9732, Vol. 79, no 1, p. 3-14Article in journal (Refereed) Published
Abstract [en]

The wastewater industry is currently facing dramatic changes, shifting away from energy-intensive wastewater treatment towards low-energy, sustainable technologies capable of achieving energy positive operation and resource recovery. The latter will shift the focus of the wastewater industry to how one could manage and extract resources from the wastewater, as opposed to the conventional paradigm of treatment. Debatable questions arise: Can the more complex models be calibrated, or will additional unknowns be introduced? After almost 30 years using well-known International Water Association (IWA) models, should the community move to other components, processes, or model structures like 'black box' models, computational fluid dynamics techniques, etc.? Can new data sources - e.g. on-line sensor data, chemical and molecular analyses, new analytical techniques, off-gas analysis - keep up with the increasing process complexity? Are different methods for data management, data reconciliation, and fault detection mature enough for coping with such a large amount of information? Are the available calibration techniques able to cope with such complex models? This paper describes the thoughts and opinions collected during the closing session of the 6th IWA/WEF Water Resource Recovery Modelling Seminar 2018. It presents a concerted and collective effort by individuals from many different sectors of the wastewater industry to offer past and present insights, as well as an outlook into the future of wastewater modelling.

Keywords
activated sludge model, big-data, computational fluid dynamics, dynamic simulation, modelling, wastewater, Activated sludge process, Big data, Chemical analysis, Computer simulation, Fault detection, Information management, Model structures, Models, Water distribution systems, Water resources, Calibration techniques, Computational fluid dynamics technique, Data reconciliation, International Water Association, Sustainable technology, Wastewater industry, Wastewater modelling, Wastewater treatment
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-38207 (URN)10.2166/wst.2018.498 (DOI)2-s2.0-85062411629 (Scopus ID)
Available from: 2019-04-02 Created: 2019-04-02 Last updated: 2019-07-31Bibliographically approved
Keucken, A., Habagil, M., Batstone, D., Jeppsson, U. & Arnell, M. (2018). Anaerobic Co-Digestion of Sludge and Organic FoodWaste — Performance, Inhibition, and Impact on theMicrobial Community. Energies, 11(9), Article ID 2325.
Open this publication in new window or tab >>Anaerobic Co-Digestion of Sludge and Organic FoodWaste — Performance, Inhibition, and Impact on theMicrobial Community
Show others...
2018 (English)In: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 11, no 9, article id 2325Article in journal (Refereed) Published
Abstract [en]

Anaerobic co-digestion allows for under-utilised digesters to increase biomethane production. The organic fraction of municipal solid waste (OFMSW), i.e., food waste, is an abundant substrate with high degradability and gas potential. This paper investigates the co-digestion of mixed sludge from wastewater treatment plants and OFMSW, through batch and continuous labscale experiments, modelling, and microbial population analysis. The results show a rapid adaptation of the process, and an increase of the biomethane production by 20% to 40%, when codigesting mixed sludge with OFMSW at a ratio of 1:1, based on the volatile solids (VS) content. The introduction of OFMSW also has an impact on the microbial community. With 50% co-substrate and constant loading conditions (1 kg VS/m3/d) the methanogenic activity increases and adapts towards acetate degradation, while the community in the reference reactor, without a co-substrate, remains unaffected. An elevated load (2 kg VS/m3/d) increases the methanogenic activity in both reactors, but the composition of the methanogenic population remains constant for the reference reactor. The modelling shows that ammonium inhibition increases at elevated organic loads, and that intermittent feeding causes fluctuations in the digester performance, due to varying inhibition. The paper demonstrates how modelling can be used for designing feed strategies and experimental setups for anaerobic co-digestion.

Keywords
anaerobic digestion; co-digestion; mathematical modelling; microbial community; solid
National Category
Water Engineering
Identifiers
urn:nbn:se:ri:diva-36639 (URN)10.3390/en11092325 (DOI)2-s2.0-85054058521 (Scopus ID)
Available from: 2018-12-18 Created: 2018-12-18 Last updated: 2019-03-29Bibliographically approved
Keucken, A., Habagil, M., Batstone, D. & Arnell, M. (2018). New insights on process performance and stability for anaerobic co-digestion through modelling and population analysis. In: : . Paper presented at IWA World Water Congress and Exhibition 2018, Tokyo, Japan.16-21 September, 2018..
Open this publication in new window or tab >>New insights on process performance and stability for anaerobic co-digestion through modelling and population analysis
2018 (English)Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

Anaerobic co-digestion (AcoD) allows for underutilised digesters to increase biomethane production. The organic fraction of municipal solid waste (OFMSW), e.g. food waste, is an abundant substrate with high degradability and gas potential. This paper focuses on the implementation of codigestion of mixed sludge from wastewater treatment and OFMSW through batch and continuous labscale experiments, modelling and microbial population analysis. The results show a rapid adaptation of the process and an increase of the biomethane production of 20 to 40% with 50% OFMSW and it has an impact on the microbial community. The methanogenic activity increases and changes towards acetate degradation while the community without co-substrate remains unaffected. The modelling results show that ammonium inhibition increases at elevated organic loads and that intermittent feeding causes fluctuations in digester performance due to varying inhibition. Modelling can be successfully used for designing feed strategies and experimental set-ups for anaerobic co-digestion.

Keywords
anaerobic digestion, mathematical modelling, microbial community, solid waste
National Category
Water Engineering
Identifiers
urn:nbn:se:ri:diva-33939 (URN)
Conference
IWA World Water Congress and Exhibition 2018, Tokyo, Japan.16-21 September, 2018.
Available from: 2018-06-14 Created: 2018-06-14 Last updated: 2019-01-22Bibliographically approved
Wittgren, H. B., Arnell, M., Berbeyer Cuevas, M. & Bäckman, J. (2017). A tool to support upstream work. In: : . Paper presented at Nordic Wastewater Conference (NORDIWA2017), Århus, Denmark, 10 – 12 October, 2017.
Open this publication in new window or tab >>A tool to support upstream work
2017 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Theupstream work at utilities can be facilitated by a tool for calculatingpollution loads. A web application for mapping sources and performing substanceflow analysis is being developed. It aims to support location of sources,planning of measurement campaigns and evaluation of specific measures.

National Category
Water Engineering
Identifiers
urn:nbn:se:ri:diva-30008 (URN)
Conference
Nordic Wastewater Conference (NORDIWA2017), Århus, Denmark, 10 – 12 October, 2017
Available from: 2017-06-29 Created: 2017-06-29 Last updated: 2018-07-20Bibliographically approved
Arnell, M., Jeppsson, U., Rahmberg, M., Oliveira, F. & Carlsson, B. (2017). Modellering av avloppsreningsverk för multikriteriebedömning av prestanda och miljöpåverkan. Stockholm, Sverige: Svenskat Vatten AB
Open this publication in new window or tab >>Modellering av avloppsreningsverk för multikriteriebedömning av prestanda och miljöpåverkan
Show others...
2017 (Swedish)Report (Other academic)
Alternative title[en]
Use of plant-wide modelling and life-cycle analysis of WWTPs for multi-criteria assessment of performance and environmental impact
Abstract [sv]

Genom att använda detaljerade dynamiska modeller och kombinera resultat från årslånga simuleringar av ARV (såväl vatten- som slamlinjer) med livscykelanalys kan olika driftstrategier utvecklas och utvärderas utifrån en bred uppsättning hållbarhetskriterier fö att maximera resursutvinning och energieffektivitet samtidigt som vattenkvalitén bibehålls och driftskostnaderna kontrolleras. Metodiken har tillämpats vid en omfattande fallstudie av Käppalaverket.

Abstract [en]

By using detailed dynamic plant-wide models and combining results from one-year simulations of ’within-the-fence’ WWTPs (both water- and sludge lines) with life-cycle analysis, different operational strategies can be developed and evaluated based on the total environmental impact (including external activities) while maximizing resource recovery and energy efficiency, maintaining good effluent quality and keeping track of the operational costs. The methodology has been applied and tested in an extensive case study of Käppala WWTP.

Place, publisher, year, edition, pages
Stockholm, Sverige: Svenskat Vatten AB, 2017. p. 66
Series
Svenskt Vatten Utveckling ; 2017-05
Keywords
Benchmarking, BSM, case study Käppala, energy effi ciency, total environmental impact, greenhouse gas emissions, life-cycle analysis, LCA, multi-criteria evaluation, plant-wide modelling, wastewater treatment
National Category
Water Engineering
Identifiers
urn:nbn:se:ri:diva-29226 (URN)
Projects
Utveckling av operationella strategier och dynamiskt analysverktyg med fokus på energieffektivisering av avloppsreningsverk. Svenskt Vatten Utveckling 10-106
Funder
Swedish Research Council Formas, 211-2010-141
Available from: 2017-04-06 Created: 2017-04-06 Last updated: 2019-01-03Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-1547-8413

Search in DiVA

Show all publications
v. 2.35.10