Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2009
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Arve Heistad Razak Seidu Andreas Svarstad Flø Adam Paruch Jon Fredrik Hanssen Thor-Axel StenströmSammendrag
Tie long-term use of a filter-based, on-site wastewater treatment system increases nutrient discharge to receiving waters and may reduce its hygienic barrier efficiency. The main purpose of this research was to assess the hygienic barrier efficiency and the associated health risks of an on-site system that had exceeded its 5-yr design capacity with respect to phosphorus (P) removal. The system was investigated for bacteria and virus removal and assessed with respect to potential health risks in relation to reuse of effluent for irrigation. The system consists of a septic tank, a pressure-dosed vertical flow biofilter, and an up-flow filter unit with lightweight clay aggregates. The total P concentration in the effluent had increased gradually from initially <0.1 mg P L-1 during the first 2 yr of operation to 1.8 mg P L-1 after 5.3 yr. Escherichia coli was used as an indicator organism for fecal bacteria removal, whereas bacteriophages phi X174 and Salmonella typhimurium phage 28B (S.t. 28B) were used to model enteric virus removal. An overall decrease in E. coli removal occurred from a complete (approximately 5.6 log(10)) reduction during the first 3 yr of operation to 2.6 log(10) reduction. The removal amounts of the bacteriophages phi X174 and S.t. 28B were 3.9 and 3.7 log(10), respectively. Based on removal of S.t. 28B, the risks of rotavirus infection and disease for the investigated scenarios were above the acceptable level of 10(-4) and 10(-3), respectively, as defined by the World Health Organization.
Forfattere
Adam ParuchSammendrag
Det er ikke registrert sammendrag
Forfattere
Adam ParuchSammendrag
Laboratory scale experiment on survival of Escherichia coli (E. coli) in samples of filter media used in constructed wetlands (CWs) treating domestic wastewater was performed. Concentration of E. coli was examined in 42 samples collected from a wetland filter/bed. All samples positive for E. coli contamination were used to assess the effect of storage time at different temperature regimes on the survival of E. coli. Storage time was set up as an unlimited factor, while temperature conditions were limited by three regimes, 4, 10 and 22 degrees. It was found that E. coli had higher persistence in samples collected from the upper, subsurface level comparing to samples taken from deeper levels (35 - 50 cm and 65 - 80 cm). Survival of E. coli in filter media collected below the depth of 35 cm from the surface level of CWs was counted up to 21 days. It was observed, however, that E. coli could survive for 14 months in samples of filter media collected right below the organic layer (5 cm). Concentration of E. coli in these samples, stored at 10 degrees, increased radically during the first 6 months and then rapidly decreased during next 1,5 month of storage. Thereafter, a slow decrease of E. coli numbers was registered up to the level that no E. coli was detected. The highest survival rate was observed in samples stored at 10 degrees, but the longest period of survival was noticed in samples stored at 4 degrees.
Forfattere
Adam ParuchSammendrag
Det er ikke registrert sammendrag
Forfattere
Sekhar Udaya NagothuSammendrag
The interdisciplinary study aims to contribute towards an increased knowledge base and dialogue between the stakeholders themselves and between researchers and stakeholders for addressing the impacts of climate change on rice farming in the Cauvery River Basin located in the peninsular part of India.
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Bioforsk Jord og Miljø har bred ekspertise på Vanndirektivet. Vi rådgir forvaltningen og utfører FoU og oppdrag innen blant annet miljøovervåking, tilførselsberegninger og tiltaksanalyser. Vi har kompetanse på både overflatevann og grunnvann.
Forfattere
Eva SkarbøvikSammendrag
Foredrag om erfaringer fra manøvreringen av Vansjø og konsekvenser for vannkvaliteten. Holdt under Vansjøkonferansen i august 2009, Moss.
Sammendrag
Presentation at the AlbLake Conference in Pogradec, Albania, April 2009.