Browsing NIVA Open Access Archive by Title
Now showing items 6803-6822 of 8165
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Treatment of leachate in aerated lagoons. Lab-scale study. VA 3/85
(NIVA-rapport;1728, Research report, 1985)In this study aerated lagoons were simulated in 5 litre Erlenmeyer flasks. The experiments showed that phosphorus nutrient supplement- ation is required for efficient treatment of leachate from a young sanitary landfill. ... -
TREATMENT OF LEACHATES FROM SANITARY LANDFILLS
(NIVA-rapport;0807, Research report, 1975)ENGELSK TEKST. SAMMENSETNING AV SIGEVANN FRA 6 SØPPELFYLLPLASSER I NORGE OG 2 FRA USA ER OMTALT. SIGEVANNENE ER RENSET MED RISLEFILTER, KONTAKTVALSE, LUFTET LAGUNE, AKTIVT SLAM OG ANAEROBISK FILTER. KJEMISK FELLING PLUS ... -
Treatment of potable water containing humus by electrolytic addition of aluminum
(NIVA-rapport;1402, Research report, 1982)The written document provides the rationale, theory, laboratory and field evaluation of the electrochemical addition of aluminum to drinking water to provide for coagulation of humus. The dissertation presents information ... -
Treatment of septage. European practice. VA 11/82
(NIVA-rapport;1451, Research report, 1983)Treatment of septage is a major problem in many European countries. Most countries in Europe handle the septage by discharging it to the sewer line or at the treatment plant inlet. In Scandinavia septage is guite often ... -
Tredje foreløpige rapport om vannrensing. Jarlsberg Mineralvann A/S. (utgår når endelig rapport foreligger)
(NIVA-rapport;0288, Research report, 1970) -
Treforedlingsindustriens ytre miljø. Resipientenes tilstand. Vedlegg i Delrapport 1: Utvalg for ytre miljø og treforedlingsindustrien. Bransjens utslipp i Norge i 1988. Myndighetenes krav i Norge. Utslippskrav i andre land
(NIVA-rapport;2397, Research report, 1989)Treforedlingsindustrien påvirker sine resipienter på flere måter. De fleste bedriftene det er funnet opplysninger om, har en markert virkning på nærområdene, og noen har også tydelige effekter på større vassdrags- eller ... -
Trends and patterns in surface water chemistry in Europe and North America between 1990 and 2016, with particular focus on changes in land use as a confounding factor for recovery
(NIVA-rapport;7479, Research report, 2020)The report presents trends in sulphate, nitrate, chloride, base cations, ANC (acid neutralising capacity), pH and DOC at circa 500 ICP Waters sites in Europe and North America for the period 1990-2016. Time series were ... -
Trends and patterns in surface water chemistry in Europe and North America between 1990 and 2020, with a focus on calcium
(NIVA-rapport;7931-2024, Research report, 2024)The report presents trends in major anions and cations, pH, TOC and bicarbonate in surface waters in Europe and North America from 1990 to 2020. Special attention is given to trends in calcium, which showed some unexpected ... -
Trends and potential human health risk of trace elements accumulated in transplanted blue mussels during restoration activities of Flekkefjord fjord (Southern Norway)
(Peer reviewed; Journal article, 2022)The monitoring of contaminants represents a priority to preserve the integrity of marine ecosystems, as well as to plan and to manage restoration activities in order to protect environmental and human health. In the present ... -
Trends in ecosystem and health responses to long-rangetransported atmospheric pollutants - ICP Waters report125/2015
(NIVA-rapport;6946, Research report, 2015)The aim of this trend report is to assess the effectiveness of air pollution policies under the Convention on Long-range Transboundary Air Pollution (LRTAP), and to document progress and identify remaining challenges. ... -
Trends in intercomparisons 8701 - 9812: pH, cond, NO3 + NO2, Cl, SO4, Ca, Mg, Na K and aluminium (ICP Waters report 56/2000)
(NIVA-rapport;4285, Research report, 2000-10)Intercomparison tests connected to the International Cooperative Programme for Monitoring and Assessment of Acidfication of Rivers and Lakes, have been organizsed every year since 1987 by the Programme Centre at Norwegian ... -
Trends in precipitation chemistry, surface water chemistry and aquatic biota in acidified areas in Europe and North America from 1990 to 2008 (ICP Waters report 106/2011)
(NIVA-rapport;6218, Research report, 2011-07)Results from international monitoring programmes on precipitation chemistry and surface water chemistry and biota for the time period 1990 to 2008 are reported here. Concentrations of sulphate and nitrate in precipitation ... -
Trends in surface water chemistry and biota; The importance of confounding factors (ICP Waters report 87/2007)
(NIVA-rapport;5385, Research report, 2007-03)The main aim of the ICP Waters Programme is to assess, on a regional basis, the degree and geographical extent of the impact of atmospheric pollution, in particular acidification, on surface waters. Twenty-two countries ... -
Trends in surface water chemistry in acidified areas in Europe and North America from 1990 to 2008
(Journal article; Peer reviewed, 2014)Acidification of lakes and rivers is still an environmental concern despite reduced emissions of acidifying compounds. We analysed trends in surface water chemistry of 173 acid-sensitive sites from 12 regions in Europe and ... -
Tresfjord. Vurdering av miljøtilstand i fjorden og konsekvenser av brubygging
(NIVA-rapport;2649, Research report, 1991)I løpet av 1990 og 1991 har NIVA foretatt undersøkelser av vannmasser og bunnfauna i Tresfjord. Undersøkelsene har sammenheng med planer om brubygging og inntil 850 m lang steinfylling på terskelen i munningen av fjorden. ... -
Tretjønn i Kristiansand. Vurdering av restaureringstiltak mot eutrofiering
(NIVA-rapport;2970, Research report, 1993)Tretjønn har høye konsentrasjoner av alger, som i sommerhalvåret fører til misfarget vann og dårlig siktedyp. Eutrofieringen av Tretjønn skyldes tidligere kloakkpåvirkning, redusert vanngjennomstrømning og intern gjødsling ... -
Trondheimsfjorden 1981. Delrapport I. Biologi
(NIVA-rapport;1452, Research report, 1982)Bløtbunnfaunaen på 50 og 85 m dyp i Stjørdalsfjorden var individrik og tydet på stor næringstilgang og produksjon. Lavt artsantall i forhold til individmengden, særlig på den dypeste stasjonen, og dominans av visse ... -
Trondheimsfjorden 1981. Delrapport III. Sedimentundersøkelser
(NIVA-rapport;1540, Research report, 1983)Målet for sedimentundersøkelsen i Trondheimsfjorden var å skaffe til veie en grov oversikt over graden av forurensning av miljøgifter på bunnen i potensielle problemområder. Resultatene viste at bunnområdet i nærheten av ... -
Trondheimsfjorden. Biologiske undersøkelser i 1983
(NIVA-rapport;1600, Research report, 1984)Orkdalsfjorden (i Trondheimsfjorden) er sterkt forurenset av tungmetaller. Bløtbunnsfaunaen i Orkdalsfjorden var svært artsfattig og dominert av forurensningstypiske arter. Diversiteten (artstall som funksjon av individtall) ... -
Trondheimsfjorden. Hydrografiske undersøkelser i 1983
(NIVA-rapport;1672, Research report, 1984)Dypvannsmassene i Trondheimsfjordens hovedbasseng er i 1983, som normalt, skiftet ut ved minst en sommer- og en høstinnstrømming. Temperaturen var generelt sett 1°C høyere enn middelet, samtidig som oksygenverdiene var ...