dc.contributor.author | Bakke, T. | nb_NO |
dc.contributor.author | Laake, M. | nb_NO |
dc.coverage.spatial | North Sea | nb_NO |
dc.date.accessioned | 2014-08-01T10:31:55Z | |
dc.date.available | 2014-08-01T10:31:55Z | |
dc.date.issued | 1991 | nb_NO |
dc.identifier | 2538 | nb_NO |
dc.identifier.isbn | 82-577-1852-1 | nb_NO |
dc.identifier.issn | 1894-7948 | nb_NO |
dc.identifier.uri | http://hdl.handle.net/11250/206272 | |
dc.description.abstract | Petrofree and Base Oil cuttings from offshore drillings were degradation tested in seminatural sea bottom ecosystem. dltrofree is a mixture of fatty acid esters. After 93 days the reduction in ester was significant and after 184 days close to 99%. Microbial degradation accounted for about 15%, while the rest probably was lost to the water as partly degraded metabolites. No significant loss was detected in the mineral oil cuttings, and biodegradation was less than 5%. Bacterial aboundance increased at both treatments. Petrofree degradation was clearly slow comparedto laboratory tests, but faster than the loss of the Base Oil. | nb_NO |
dc.description.sponsorship | BP Norway Limited U.A. | nb_NO |
dc.publisher | Norsk institutt for vannforskning | nb_NO |
dc.relation.ispartofseries | NIVA-rapport;2538 | nb_NO |
dc.rights | Navngivelse-IkkeKommersiell-DelPåSammeVilkår 3.0 Norge | nb_NO |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-sa/3.0/no/ | nb_NO |
dc.subject | olje & gass | nb_NO |
dc.title | Tests on degradation of a new drill mud type under natural conditions | nb_NO |
dc.type | Research report | nb_NO |
dc.rights.holder | Norsk institutt for vannforskning/Norwegian institute for water research | nb_NO |
dc.subject.nsi | VDP::Matematikk og naturvitenskap: 400 | nb_NO |
dc.source.pagenumber | 42 | nb_NO |
dc.subject.keyword | olje | nb_NO |
dc.subject.keyword | gass | nb_NO |
dc.subject.keyword | oljeboring | nb_NO |
dc.subject.keyword | kjemikalie | nb_NO |
dc.subject.keyword | nedbrytning | nb_NO |
dc.subject.keyword | sediment biologisk nedbrytning | nb_NO |
dc.subject.keyword | oildrilling | nb_NO |
dc.subject.keyword | chemicals | nb_NO |
dc.subject.keyword | degradation | nb_NO |
dc.subject.keyword | sediments | nb_NO |
dc.relation.project | O-90101 | nb_NO |