Cristin-resultat-ID: 1924478
Sist endret: 25. november 2021, 14:42
NVI-rapporteringsår: 2021
Resultat
Vitenskapelig artikkel
2021

What effect does rehabilitation of wastewater pipelines have on the share of infiltration and inflow water (I/I-water)?

Bidragsytere:
  • Kristin Jenssen Sola
  • Jarle Tommy Bjerkholt
  • Oddvar Georg Lindholm og
  • Harsha Ratnaweera

Tidsskrift

Water
ISSN 2073-4441
e-ISSN 2073-4441
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2021
Volum: 13
Hefte: 14
Sider: 1 - 16
Open Access

Importkilder

Scopus-ID: 2-s2.0-85111169771

Beskrivelse Beskrivelse

Tittel

What effect does rehabilitation of wastewater pipelines have on the share of infiltration and inflow water (I/I-water)?

Sammendrag

Infiltration and inflow water (I/I-water) is a big challenge in sewage systems in many countries. I/I-water above an acceptable level indicates that the sewage system is not functioning properly. I/I-water leads to increased pumping costs and increased sewage overflow, leading to increased pollution of the receiving waters. Many rehabilitation projects are driven by the need to reduce the share of I/I-water and common measures are to replace pipes and manholes. The share of I/I-water is predominantly driven by rainfall. This makes it difficult to document the efficiency of mitigating measures. One way to address this issue is to compare data from rehabilitation areas to areas where no measures have been implemented. Three rehabilitation areas in Asker Municipality, Norway, were successfully assessed by applying this approach. Asker has a 100% separate system. The strategy to reduce I/I-water in Asker Municipality was to rehabilitate sewage mains, either by full replacement or lining the old pipes, and replacement of manholes. The assessment shows that rehabilitation of selected municipal pipes, pipes proven to be in bad condition through closed circuit TV inspection, reduced the share of I/I-water only to a limited extent. Since the rehabilitation done was not a complete replacement of all pipes and manholes, the limited effects are assumed to be caused by the water finding other ways into the system. In separate systems other measures than renovations of pipes should be considered when aiming to reduce I/I-water.

Bidragsytere

Kristin Jenssen Sola

  • Tilknyttet:
    Forfatter
    ved Asker kommune
  • Tilknyttet:
    Forfatter
    ved Realfag og teknologi ved Norges miljø- og biovitenskapelige universitet

Jarle Tommy Bjerkholt

  • Tilknyttet:
    Forfatter
    ved Institutt for prosess-, energi- og miljøteknologi ved Universitetet i Sørøst-Norge
  • Tilknyttet:
    Forfatter
    ved Realfag og teknologi ved Norges miljø- og biovitenskapelige universitet
Aktiv cristin-person

Oddvar G. Lindholm

Bidragsyterens navn vises på dette resultatet som Oddvar Georg Lindholm
  • Tilknyttet:
    Forfatter
    ved Institutt for bygg og miljøteknikk ved Norges miljø- og biovitenskapelige universitet

Harsha Ratnaweera

  • Tilknyttet:
    Forfatter
    ved Institutt for bygg og miljøteknikk ved Norges miljø- og biovitenskapelige universitet
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