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Mattsson, Jonathan
Publications (10 of 15) Show all publications
Mattsson, J., Hedström, A., Westerlund, L., Dahl, J., Ashley, R. & Viklander, M. (2018). Impacts on rural wastewater systems in subarctic regions due to changes in inputs from households (ed.). Journal of cold regions engineering, 32(1), Article ID 04017019.
Open this publication in new window or tab >>Impacts on rural wastewater systems in subarctic regions due to changes in inputs from households
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2018 (English)In: Journal of cold regions engineering, ISSN 0887-381X, E-ISSN 1943-5495, Vol. 32, no 1, article id 04017019Article in journal (Refereed) Published
Abstract [en]

The use of water-saving appliances and heat exchangers is becoming increasingly popular to decrease water consumption and recover energy from preheated water. However, such in-household changes can bring particular implications for subarctic rural areas, in terms of solids deposition in sewers and drops in performance of wastewater treatment plants (WWTPs), because these are already experiencing diminishing wastewater flows due to depopulation and seasonal dips in wastewater temperature resulting from infiltration into sewers. Hence, this study has considered two communities in Sweden, postulating three different cases with various scales of retrofitting and usage. The results indicate that the decrease in in-pipe velocities when all households are retrofitted with water-saving appliances could be counteracted by sewer relining, but not by the inclusion of a conventional estimate of infiltration. However, for the case in which retrofitting was combined with decreased usage of the appliances, the decrease in self-cleansing capacity could not be counteracted. The retrofitting of heat exchangers under shower trays in all households did not have a significant effect on treatment processes at the WWTP.

Place, publisher, year, edition, pages
American Society of Civil Engineers (ASCE), 2018
National Category
Water Engineering Energy Engineering
Research subject
Urban Water Engineering; Energy Engineering
Identifiers
urn:nbn:se:ltu:diva-14539 (URN)10.1061/(ASCE)CR.1943-5495.0000145 (DOI)000428257200005 ()2-s2.0-85030121882 (Scopus ID)de948167-31d8-4bac-a3d7-ca6af781096b (Local ID)de948167-31d8-4bac-a3d7-ca6af781096b (Archive number)de948167-31d8-4bac-a3d7-ca6af781096b (OAI)
Note

Validerad;2017;Nivå 2;2017-09-25 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-04-20Bibliographically approved
Mattsson, J., Mattsson, A. E., Davidsson, F., Hedström, A., Österlund, H. & Viklander, M. (2016). Normalization of Wastewater Quality to Estimate Infiltration/Inflow and Mass Flows of Metals. Journal of environmental engineering, 142(11), Article ID 4016050.
Open this publication in new window or tab >>Normalization of Wastewater Quality to Estimate Infiltration/Inflow and Mass Flows of Metals
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2016 (English)In: Journal of environmental engineering, ISSN 0733-9372, E-ISSN 1943-7870, Vol. 142, no 11, article id 4016050Article in journal (Refereed) Published
Abstract [en]

The quality of wastewater varies between catchments due to variation in urbanisation, sewer system properties, and pollution levels. This study was conducted to identify wastewater quality parameters that could be normalized to estimate levels of infiltration/inflow (I/I) in selected catchments and to investigate the geographic origins of metals entering sewer systems. Two sampling campaigns were conducted in the five catchments of the Gothenburg area focusing on 14 water quality parameters. Data from a reference study on domestic wastewater quality to normalize the mass flows associated with pure domestic wastewater was applied. The level of dilution due to I/I in wastewater entering Rya Wastewater Treatment Plant, estimated using Tot-N and Tot-P as indicators, provided the closest fit among the water quality parameters with results obtained by established methods for the two campaigns. The results from the study also indicated which catchments generated nondomestic wastewater with higher mass flows of specified metals.

National Category
Water Engineering
Research subject
Urban Water Engineering
Identifiers
urn:nbn:se:ltu:diva-60376 (URN)10.1061/(ASCE)EE.1943-7870.0001120 (DOI)000386358500003 ()2-s2.0-84991583845 (Scopus ID)60088a3c-a243-4b82-b997-cd82b3c90ce9 (Local ID)60088a3c-a243-4b82-b997-cd82b3c90ce9 (Archive number)60088a3c-a243-4b82-b997-cd82b3c90ce9 (OAI)
Note

Validerad; 2016; Nivå 2; 2016-11-14 (andbra)

Available from: 2016-11-14 Created: 2016-11-14 Last updated: 2018-07-10Bibliographically approved
Mattsson, J., Hedström, A., Ashley, R. & Viklander, M. (2015). Impacts and managerial implications for sewer systems due to recent changes to inputs in domestic wastewater: a review (ed.). Paper presented at . Journal of Environmental Management, 161, 188-197
Open this publication in new window or tab >>Impacts and managerial implications for sewer systems due to recent changes to inputs in domestic wastewater: a review
2015 (English)In: Journal of Environmental Management, ISSN 0301-4797, E-ISSN 1095-8630, Vol. 161, p. 188-197Article in journal (Refereed) Published
Abstract [en]

Ever since the advent of major sewer construction in the 1850s, the issue of increased solids deposition in sewers due to changes in domestic wastewater inputs has been frequently debated. Three recent changes considered here are the introduction of kitchen sink food waste disposers (FWDs); rising levels of inputs of fat, oil and grease (FOG); and the installation of low-flush toilets (LFTs). In this review these changes have been examined with regard to potential solids depositional impacts on sewer systems and the managerial implications. The review indicates that each of the changes has the potential to cause an increase in solids deposition in sewers and this is likely to be more pronounced for the upstream reaches of networks that serve fewer households than the downstream parts and for specific sewer features such as sags. The review has highlighted the importance of educational campaigns directed to the public to mitigate deposition as many of the observed problems have been linked to domestic behaviour in regard to FOGs, FWDs and toilet flushing. A standardized monitoring procedure of repeat sewer blockage locations can also be a means to identify depositional hot-spots. Interactions between the various changes in inputs in the studies reviewed here indicated an increased potential for blockage formation, but this would need to be further substantiated. As the precise nature of these changes in inputs have been found to be variable, depending on lifestyles and type of installation, the additional problems that may arise pose particular challenges to sewer operators and managers because of the difficulty in generalizing the nature of the changes, particularly where retrofitting projects in households are being considered. The three types of changes to inputs reviewed here highlight the need to consider whether or not more or less solid waste from households should be diverted into sewers.

National Category
Water Engineering
Research subject
Urban Water Engineering
Identifiers
urn:nbn:se:ltu:diva-16075 (URN)10.1016/j.jenvman.2015.06.043 (DOI)000361264100022 ()26182992 (PubMedID)2-s2.0-84938593759 (Scopus ID)fa88963c-f0d7-410c-8207-1dbb3f8f1fb5 (Local ID)fa88963c-f0d7-410c-8207-1dbb3f8f1fb5 (Archive number)fa88963c-f0d7-410c-8207-1dbb3f8f1fb5 (OAI)
Note
Validerad; 2015; Nivå 2; 20150416 (jonmat)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Mattsson, J. (2015). Impacts on sewer performance due to changes to inputs in domestic wastewater (ed.). (Doctoral dissertation). Paper presented at . : Luleå tekniska universitet
Open this publication in new window or tab >>Impacts on sewer performance due to changes to inputs in domestic wastewater
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The impacts of changes in domestic wastewater inputs on sewer performance have been debated since the dawn of the great sewer construction movement in the 1850s. Nowadays, typical household wastewater that enters sewers can generally be divided into streams from the WC, shower and/or bathtub, kitchen sink, washing machine and dishwasher. Changes in thecomposition of domestic wastewater entering a sewer will depend on inter alia the properties of the appliances used in the households and householders’ residential habits. Recent such changes with a potentially detrimental impact on sewer performance are increased levels of fat, oil and grease used in kitchen practices; the introduction of kitchen sink food waste disposers;and the installation of domestic water efficient appliances. The overall aim of this thesis was, from an historical perspective, to explore how recent changes to inputs in domestic wastewater can impact performance of sewer systems and how this relates to sewers as future carriers of domestic wastewater.Various methods to examine the aim have been employed. Two questionnaire surveys were distributed. The first was sent out to sewer operators/managers employed at Scandinavian public water utilities to explore their views on the extent of fat, oil and grease in sewer systems.The second was sent to sewer/operators managers employed at public water utilities in Northern Sweden to explore the extent of monitoring of incidents of blockages. Two field studies have also been undertaken. One entailed the investigation of long term impacts on sewer performance from the introduction of food waste disposers in housing areas. The other evaluated which parameters of domestic wastewater could be used to estimate levels of infiltration/ inflow into sewers. In addition, a case analysis was undertaken to assess future impacts on self-cleansing regimes in sewer networks when rural subarctic villages are retrofitted with water efficient appliances. A literature review was performed to identify and analyse studies examining changes to domestic wastewater the impact these changes may have on sewer systems,and their implications for sewer management. Responses from the first questionnaire survey suggested that an increase in blockages due tofat, oil and grease, in particular at pumping stations, was the most reported problem. Responses from the second questionnaire survey indicated that the extent of monitoring reoccurring blockage locations was found to be low, although two water utilities possessed GIS-systems which supported such endeavours. The first field study indicated that the level of in-sewerdeposition was observed to be increased when a pipe received high input of effluents from the kitchen sink disposers. This was observed to a further degree when a pipe had a gentle inclination combined with significant sagging along its length. From the second field study it was found that among compounds normally sampled to determine wastewater characteristic, the parameters Tot-N and Tot-P provided the closest fit to estimated levels of infiltration/inflowbased on water consumption rates. The case analysis indicated that the decrease in in-pipe velocities when all households are retrofitted with water saving appliances could be counteracted by sewer relining when water consumption rates did not drop below 130 l/hd.d. The impacts on sewer performance from these changes seemed to be dictated by many factors,e.g. household practices and the status of separate pipes. Therefore there is a need to put the changes to inputs in the context of larger societal trends to properly understand their full implications regarding future objectives when relying on the sewer as a carrier of domestic wastewater.

Place, publisher, year, edition, pages
Luleå tekniska universitet, 2015
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
National Category
Water Engineering
Research subject
Urban Water Engineering
Identifiers
urn:nbn:se:ltu:diva-18086 (URN)6c594544-2b6f-46b8-a276-e3877d9bf0e0 (Local ID)978-91-7583-350-7 (ISBN)978-91-7583-351-4 (ISBN)6c594544-2b6f-46b8-a276-e3877d9bf0e0 (Archive number)6c594544-2b6f-46b8-a276-e3877d9bf0e0 (OAI)
Note
Godkänd; 2015; 20150416 (jonmat); Nedanstående person kommer att disputera för avläggande av teknologie doktorsexamen. Namn: Jonathan Mattsson Ämne: Urban Water Engineering Uppsats: Impacts on Sewer Performance due to Changes to Inputs in Domestic Wastewater Opponent: Professor David Butler, Mathematics och Physical Sciences, College of Engineering, University of Exeter, Exeter, Storbritannien Ordförande: Professor Maria Viklander, Avd för arkitektur och vatten, Institutionen för samhällsbyggnad och naturresurser, Luleå tekniska universitet, Luleå Tid: Fredag den 12 juni 2015 kl. 10.00 Plats: A109, Luleå tekniska universitetAvailable from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Mattsson, J., Hedström, A., Viklander, M. & Blecken, G.-T. (2014). Fat, Oil, and Grease Accumulation in Sewer Systems: Comprehensive Survey of Experiences of Scandinavian Municipalities (ed.). Paper presented at . Journal of environmental engineering, 140(3), Article ID 4014003.
Open this publication in new window or tab >>Fat, Oil, and Grease Accumulation in Sewer Systems: Comprehensive Survey of Experiences of Scandinavian Municipalities
2014 (English)In: Journal of environmental engineering, ISSN 0733-9372, E-ISSN 1943-7870, Vol. 140, no 3, article id 4014003Article in journal (Refereed) Published
Abstract [en]

Problems with fat, oil, and grease (FOG) in sewer systems have received relatively little attention, although in the longer term this might imply (inter alia) blockages and sanitary overflows. Therefore, the experiences of Swedish and Norwegian executive water engineers concerning FOG-related issues were assessed using a comprehensive questionnaire that was distributed to all Swedish and Norwegian municipalities (with a response rate of 35% and 25% in Sweden and Norway, respectively). Blockages caused by FOG in sewers and pumping stations were the most prevalent reported problem, followed by increased demand for line flushing. The water engineers singled out city centers as the areas whose sewers had the most severe problems with FOG buildups. Most municipalities mandated the use of grease interceptors (GIs) by businesses, but the maintenance and functional status of these devices were reported to be inadequate. Commonly, water engineers had faith in the functioning of the GI despite the lack of stringent inspections. Where FOG collection systems had been implemented, they generally targeted businesses and other enterprises rather than private households. Because problems caused by FOG buildups are likely to become more common in the future, it is important that prevention strategies characterize management to a higher degree than ones based on removal.

National Category
Water Engineering
Research subject
Urban Water Engineering
Identifiers
urn:nbn:se:ltu:diva-5272 (URN)10.1061/(ASCE)EE.1943-7870.0000813 (DOI)000332659800005 ()2-s2.0-84894317500 (Scopus ID)354abeb3-3d4a-4713-b8be-b6918b19e0c5 (Local ID)354abeb3-3d4a-4713-b8be-b6918b19e0c5 (Archive number)354abeb3-3d4a-4713-b8be-b6918b19e0c5 (OAI)
Note
Validerad; 2014; 20140121 (jonmat)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Mattsson, J., Hedström, A. & Viklander, M. (2014). Indicators for blockages caused by changing wastewater – How well does a municipality need to know its sewer? (ed.). Paper presented at International Conference on Urban Drainage : 07/09/2014 - 12/09/2014. Paper presented at International Conference on Urban Drainage : 07/09/2014 - 12/09/2014.
Open this publication in new window or tab >>Indicators for blockages caused by changing wastewater – How well does a municipality need to know its sewer?
2014 (English)Conference paper, Oral presentation only (Refereed)
National Category
Water Engineering
Research subject
Urban Water Engineering
Identifiers
urn:nbn:se:ltu:diva-32801 (URN)76699864-512c-480f-a36d-0749db35c67e (Local ID)76699864-512c-480f-a36d-0749db35c67e (Archive number)76699864-512c-480f-a36d-0749db35c67e (OAI)
Conference
International Conference on Urban Drainage : 07/09/2014 - 12/09/2014
Note
Godkänd; 2014; 20140922 (jonmat)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Mattsson, J., Hedström, A. & Viklander, M. (2014). Long-term impacts on sewers following food waste disposer installation in housing areas (ed.). Paper presented at . Environmental technology, 35(21), 2643-2651
Open this publication in new window or tab >>Long-term impacts on sewers following food waste disposer installation in housing areas
2014 (English)In: Environmental technology, ISSN 0959-3330, E-ISSN 1479-487X, Vol. 35, no 21, p. 2643-2651Article in journal (Refereed) Published
Abstract [en]

To increase biogas generation and decrease vehicle transportation of solid waste, the integration of food waste disposers (FWDs) into the wastewater system has been proposed. However, concerns have been raised about the long-term impact of the additional load of the FWDs on sewer systems. To examine said impact, this study has used CCTV(closed-circuit television) inspection techniques to evaluate the status of 181 concrete pipes serving single family housing areas with a diameter of 225 mm, ranging from a 100% connection rate of households with an FWD to none. A minor study was also performed on a multi-family housing area, where mainly plastic pipes (200 mm) were used. The extent and distribution of deposits related to the ratio of FWDs, inclination and pipe sagging (backfalls) was ascertained by using linear regression and analysis of variance (ANOVA). The results showed that FWDs have had an impact on the level of deposits in the sewer, but this has, in turn, been of minor significance. With a high connection rate of FWDs upstream of a pipe, the extent of the total level of deposits, as well as finer sediments, was statistically determined to be greater. However, the majority of the deposits were observed to be small which would suggest the impact of FWDs on sewer performance to be minor. As food waste not compatible with the FWD was seen in the sewers, educational campaigns could be beneficial to further lower the risks of sewer blocking.

National Category
Water Engineering
Research subject
Urban Water Engineering
Identifiers
urn:nbn:se:ltu:diva-11735 (URN)10.1080/09593330.2014.915346 (DOI)000341002600001 ()25176297 (PubMedID)2-s2.0-84906789521 (Scopus ID)abcd7d96-bc42-445b-8af9-94b031601bd4 (Local ID)abcd7d96-bc42-445b-8af9-94b031601bd4 (Archive number)abcd7d96-bc42-445b-8af9-94b031601bd4 (OAI)
Note
Validerad; 2014; 20140423 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Mattsson, J., Hedström, A. & Viklander, M. (2013). Bridging the gap between sewer status and new sewer inputs: A decision support tool to predict the effect of food waste disposers’ effluent on small-diameter sewers (ed.). Paper presented at International Conference on Sewer Processes & Networks : 28/08/2013 - 30/08/2013. Paper presented at International Conference on Sewer Processes & Networks : 28/08/2013 - 30/08/2013.
Open this publication in new window or tab >>Bridging the gap between sewer status and new sewer inputs: A decision support tool to predict the effect of food waste disposers’ effluent on small-diameter sewers
2013 (English)Conference paper, Oral presentation only (Refereed)
National Category
Water Engineering
Research subject
Urban Water Engineering
Identifiers
urn:nbn:se:ltu:diva-37397 (URN)b663a695-9110-4d7e-b3e4-0e77465c0a97 (Local ID)b663a695-9110-4d7e-b3e4-0e77465c0a97 (Archive number)b663a695-9110-4d7e-b3e4-0e77465c0a97 (OAI)
Conference
International Conference on Sewer Processes & Networks : 28/08/2013 - 30/08/2013
Note
Godkänd; 2013; 20130812 (jonmat)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-11-25Bibliographically approved
Mattsson, J. & Hedström, A. (2012). Matavfallskvarnar: Långtidseffekter på ledningsnät (ed.). Paper presented at . Stockholm: Svenskt vatten
Open this publication in new window or tab >>Matavfallskvarnar: Långtidseffekter på ledningsnät
2012 (Swedish)Report (Other academic)
Abstract [sv]

Studien har undersökt långtidseffekter av matavfallskvarnar (MAK) på ledningsnät. MAK synes ha haft en påverkan, men denna var av mindre art. Ytterst sällan kunde någon större funktionsnedsättning påvisas.

Place, publisher, year, edition, pages
Stockholm: Svenskt vatten, 2012. p. 46
Series
Svenskt Vatten Utveckling ; 2012-08
National Category
Water Engineering
Research subject
Urban Water Engineering
Identifiers
urn:nbn:se:ltu:diva-24786 (URN)c835ad2b-d51d-42a6-b1a2-3e64e10c1ddf (Local ID)c835ad2b-d51d-42a6-b1a2-3e64e10c1ddf (Archive number)c835ad2b-d51d-42a6-b1a2-3e64e10c1ddf (OAI)
Note
Godkänd; 2012; 20120709 (jonmat)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Amofah, L. R., Mattsson, J. & Hedström, A. (2012). Willow bed fertigated with domestic wastewater to recover nutrients in subarctic climates (ed.). Paper presented at . Ecological Engineering: The Journal of Ecotechnology, 47, 174-181
Open this publication in new window or tab >>Willow bed fertigated with domestic wastewater to recover nutrients in subarctic climates
2012 (English)In: Ecological Engineering: The Journal of Ecotechnology, ISSN 0925-8574, E-ISSN 1872-6992, Vol. 47, p. 174-181Article in journal (Refereed) Published
Abstract [en]

Conventional methods for wastewater treatment emphasise protecting human health, receiving waters and the environment. Consequently, they are generally designed to reduce pollutant levels and are not well-suited for creating resources. This paper describes a new, more sustainable and energy-efficient approach to wastewater treatment that satisfies health and environmental standards while also facilitating resource recovery. A full-scale compact willow bed was intensively fertigated with domestic wastewater in a cold climate to examine biomass production, the recovery of nutrients in willow biomass, and wastewater treatment. The performance of the willow bed was assessed for two years, covering three growing seasons. The studied frost-tolerant willow clones produced good biomass yields per unit area (6–7 ton dry matter/ha and year) under intensive fertigation with dense planting and continuous harvesting. The biomass yield of willow species exhibiting vertical growth seemed to be greater than that for lateral growth species in the dense stands studied. In contrast to biomass production, nutrient recovery was facilitated by intensive fertigation, continuous harvesting and less dense planting with a horizontally growing willow clone. The estimated nitrogen accumulation in above-ground biomass was 210 kg/ha and that of phosphorus was 30 kg/ha. 90% of the accumulated nutrients in the above-ground biomass were removed from the site during the experimental period. However, the quantity of nutrients accumulated in the willow biomass represented only a small fraction of the loaded or removed amount. The willow bed was shown to be an efficient prefilter for reducing the abundance of particulate and organic matter, leaving the bulk of the remaining nutrients in forms that could be recovered in subsequent treatment steps.

Keywords
Civil engineering and architecture - Water engineering, Samhällsbyggnadsteknik och arkitektur - Vattenteknik
National Category
Water Engineering
Research subject
Urban Water Engineering
Identifiers
urn:nbn:se:ltu:diva-9015 (URN)10.1016/j.ecoleng.2012.06.030 (DOI)000309433600024 ()2-s2.0-84864027655 (Scopus ID)79256e05-51a0-4810-b63a-548e0639f9e1 (Local ID)79256e05-51a0-4810-b63a-548e0639f9e1 (Archive number)79256e05-51a0-4810-b63a-548e0639f9e1 (OAI)
Note
Validerad; 2012; 20120720 (learas)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
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