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Impacts on rural wastewater systems in subarctic regions due to changes in inputs from households
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Arkitektur och vatten. S-Group Solutions, Malmö.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Arkitektur och vatten.ORCID-id: 0000-0001-9541-3542
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Energivetenskap.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Energivetenskap.
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Rekke forfattare: 62018 (engelsk)Inngår i: Journal of cold regions engineering, ISSN 0887-381X, E-ISSN 1943-5495, Vol. 32, nr 1, artikkel-id 04017019Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
American Society of Civil Engineers (ASCE), 2018. Vol. 32, nr 1, artikkel-id 04017019
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Forskningsprogram
VA-teknik; Energiteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-14539DOI: 10.1061/(ASCE)CR.1943-5495.0000145ISI: 000428257200005Scopus ID: 2-s2.0-85030121882Lokal ID: de948167-31d8-4bac-a3d7-ca6af781096bOAI: oai:DiVA.org:ltu-14539DiVA, id: diva2:987512
Merknad

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

Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-04-20bibliografisk kontrollert

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Mattsson, JonathanHedström, AnnelieWesterlund, LarsDahl, JanAshley, RichardViklander, Maria

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