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… quality objectives, adopted by the Swedish parliament. There is a need for a sewage system that can fulfill stringent requirements concerning the environment, recycling and resource use and hygiene. Additional environmental aspects in recent years are the impact of climate …
… the results with a study done 1989, the flow of hazardous substances in the sewage system was measured with two methods, flow proportional measurements which were more expensive and complicated, and passive measurement, which were simpler and cheaper. A comparison between the …
växthusgaser, energi- och resursanvändning i modellstudie
… and contigous adjustment of control parameters. Total production of sewage sludge decreased with 5-20 % with urine separation and with 50-60 % with black water separation. Total methane production decreased with 0-20 % with urine separation and with 60-70 % with black water …
… winter rape, selling the rye weat as whole crop and fertilize the hemp with sewage sludge. I’ve only been calculating with crops fitting to crop sequences from the southern part of Sweden. The calculations are based on three crop sequences concentrated more or less on bioenergy …
provtagning, analys och förslag till åtgärder
… measure against high acidity is to inject a slurry of reactive lime stone and sewage sludge into the waste rock dump. This should increase the pH and facilitate reducing conditions, which should keep the heavy metals in precipitated metal sulphides. Addition of sewage sludge to …
In order to avoid harmful substances ending up at the municipal sewage treatment plants, it is important to purify the wastewater at the source. One such source is the wheel washers available in many tire garages which are used to wash the wheels on our vehicles when we change …
… and why. Studies have shown that the emissions are different from different sewage treatment plants, partly because the plants have different loads and treatment processes. It is therefore essential that more studies are made to get a better understanding of the emission …
Swedish biogas is currently produced mainly by anaerobic digestion of sewage sludge at sewage treatment plants, landfills and anaerobic digestion of household or industrial waste. Also cattle ma-nure from farms can be used to produce biogas. Upgrading biogas represents an …
rensning av stopp samt uppsamling och attityder
… of heavy metals to arable land were much below the permitted ones when using sewage sludge as a pertiliser, except for copper where the amounts were slightly under the permitted level. The enquiry concentrated on the disadvantages with urine separating toilets, to find problems …
… mainly of household-, construction- and industrial waste, retted sludge from sewage treatment plants and soil, which all can produce large quantities of methane gas. The investigation about the different methods for conducting a water balance resulted in the presentation of two …
Möjligheter att återföra fosforföreningar i avloppsslam till produktiv mark
Gästrike Vatten är ett kommunalägt driftbolag bildat 2008. Bolaget har avloppsreningsverk i Gävle, Hofors, Ockelbo och Älvkarleby kommuner som tillsammans renar avloppsvatten från cirka 120 000 personer. Totalt producerar Gästrike Vatten cirka 11 000 ton slam per år som renderar …
substance flow analysis on a regional level
In this thesis, the flows of reactive nitrogen (Nr) in Scania were investigated and quantified. The thesis was also intended to form a basis for comparison between the urban nitrogen flow and other flows of nitrogen within Scania. The management of nitrogen in society has …
