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.
2006
Sammendrag
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Forfattere
Ove BergersenSammendrag
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Forfattere
Ove BergersenSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Ove BergersenSammendrag
Det er ikke registrert sammendrag
Sammendrag
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Sammendrag
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Forfattere
Anne Falk Øgaard Tore KrogstadSammendrag
Det er ikke registrert sammendrag
Sammendrag
Zero-valent iron improves the transformation of DDT [1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane] and its metabolites in aged and highly contaminated lake sediment under biotic conditions. The addition of Feº has a strong effect on transformation rates at 22 ºC and 9 ºC, the most enhanced degradation being obtained for DDT and DDOH [2,2-bis(pchlorophenyl) ethanol]. At 22 ºC and 10 weeks´incubation, the DDT concentration is reduced from 2.75 lmol g-1 (974 mg kg-1) to 0.98 lmol g-1 (346 mg kg-1) and 1.98 lmol g-1 (702 mg kg-1) in samples with and without the addition of iron, respectively. After 40 weeks` incubation these concentrations have further decreased to 0.19 lmol g-1 (66 mg kg -1) and 0.74 lmol g-1 (264 mg kg-1).There is no significant transformation of any of the compounds at 9 ºC without the addition of Feº. In the presence of iron, however, DDT is reduced to 1.25 lmol g-1 (442 mg kg-1) within 40 weeks´ incubation. This study demonstrates the ability of adapted microorganisms to transform DDT under elevated temperatures in original, aged sediments, and also the stimulating effect of zero-valent iron, which is significant even at low temperatures.
Sammendrag
In the Nordic countries several composting plants for source separated organic household waste (SSOW) experience problems with slow degradation of organic matter and stagnation of temperature around 45-50ºC in early phases of the composting process. The process problems have been connected to high content of organic acids and domination of fermenting organisms in the waste. To break the domination of fermenting organisms, measures must be taken to develop an aerob, thermophilic bacteria population. We have studied how lime addition and adjustment of the SSOW:bulking agent (BA)-ratio influence the development of thermophilic conditions and high-rate respiration in SSOW-based composting.