FOSFORMODELLER FÖR FISKODLING I SÖTVATTEN / Phosphorus mass balance models for freshwater fish farms
Existing mass balance models for phosphorus were tested for fish farm emissions in eight Northern and Central European lakes. These traditional models overestimated the total phosphorus concentration in these lakes by on average a factor of two. Data from the eight lakes were therefore used to calibrate emission specific models based on the Vollenweider and […]
Författare
TORBJÖRN JOHANSSON och LENNART NORDVARG
Nyckelord (Keyword)
Aquaculture, freshwater, phosphorus, models
Årgång
2003
Nummer
1
Utgåva
This is an evaluation of a new method, the denitrification wall, with the purpose of diminishing nutrient content in drainage water from agriculture land use. The denitrification wall consists of a trench filled with soil mixed with sawdust that intersects the drainage pipes.. The concept was applied in the drainage area of River Råån in […]
Författare
PÄR PERSSON, TORBJÖRN DAVIDSSON och JONAS SVENSSON
Nyckelord (Keyword)
denitrification wall, sawdust, drainage water, nutrient reduction.
Årgång
2003
Nummer
1
Utgåva
REMOVAL OF HEAVY METALS IN WATER BY PINE BARK / Reduktion av metaller från vatten genom furubarkflis
Metals that are dissolved in storm water can be removed by filtrating water through specially constructed filter systems. Pine bark is an interesting material for this purpose, but it needs further investigations regarding its removal efficiency of metals. This paper presents a laboratory study where pine bark was tested to evaluate its efficiency in reducing […]
Författare
CARINA FÄRM
Nyckelord (Keyword)
Filtration, heavy metals, model, pine bark, run off, sorption isotherms, storm water
Årgång
2003
Nummer
1
Utgåva
Liquids obtained during handling of solid wastes may contain a high concentration of nitrogen (ten times higher than the nitrogen concentration in municipal wastewater). At the same time these liquids contain too low concentration of biodegradable organic material for nitrogen to be removed by conventional denitrification. This paper proposes a new treatment system for leachates […]
Författare
ALEKSANDRA NIKOLIC and BENGT HULTMAN
Nyckelord (Keyword)
Chemical denitrification; leachate; nitritation; concentration; nitrogen removal; urea.
Årgång
2003
Nummer
1
Utgåva
The effect of fixed media biofilter on the removal of colour was studied in a pilot scale column at the Waterworks in Oskarshamn. The process was applied on a surface raw water with a very high colour content. The results indicated the potential of colour removal and the simultaneous effect on iron and manganese. The […]
Författare
HUSAM S.JABUR, CHARLOTTA KARLSSON och JONAS MÅRTENSSON
Nyckelord (Keyword)
Pre-Treatment, Biofilter, colour, manganese, iron, bacteria.
Årgång
2003
Nummer
1
Utgåva