31 uppsatser · sida 1 av 3
… survey the function of the biological reactor with respect to the reduction of organic matter. Further to clarify which circumstances that have a negative effect on the organic reduction. During the three forthcoming years, an extensive reconstruction of the biological …
en åtgärd för ökad TOC-reduktion hos Skoghalls Bruk luftade damm
… One of the contaminations that is important to extract from the wastewater, is organic carbon (measured as TOC-total organic carbon) because microbiological breakdown can lead to the bottom becomig free of oxygen. The wastewater treatment at Skoghall Mill is done through an …
… wastewater, which gives a wastewater with high concentrations of nutrients and organic carbon. This is partly positive, because one of the limiting factors for effective biological phosphorus removal is the lack of easily biodegradable organic carbon. The high concentrations of …
Modellkonstruktion och Utvärdering med ORWARE
… of using pretreatment andanaerobic digestion for waste management of organic waste from a system perspective. Forthis purpose a computer program called ORWARE has been used. ORWARE (organic wasteresearch) is a program for making life cycle assessments of waste management. As the …
… has been to study the gas production, power consumption and the reduction of organic matter and nutrients. The system has been completed with a reverse osmosis unit and a total of four batch runs have been made with good results. The use of reverse osmosis allows nutrient in the …
en litteratursammanställning om såtid, radavstånd och utsädesmängd
… compensate for a likely yield level reduction caused by the wider spacing. In organic cultivation wider row spacing is an opportunity for developed mechanical weed control, where a lower weed amount can increase the yield. Seed rate should be adapted to the growing location …
Kartläggning av inkommande avloppsvatten och optimering av driftparametrar
… sludge processes referred to as BIO 1 and BIO 2. The main aim is to reduce the organic substance content, measured as COD (Chemical Oxygen Demand) before the wastewater is released into the environment. Since the effluent produced is very rich in organic substances, the addition …
… Hg export is due to an increased mobilization of complexes associated with inorganic sulphides and/or dissolved organic matter (DOM), whereas increase in MeHg concentrations may in addition be due to an enhanced production in soils of clear-cut areas. The latter process is …
En studie om möjligheten till implementering av lakto-ovo-vegetarisk och ekologisk kost i Eskilstuna kommuns förskola
… was to describe the possibility of implementing a lacto-ovo-vegetarian and organic diet in Eskilstuna municipality’s public preschool. Furthermore the purpose was to identify and describe the most important components involved in the implementation and their influence in the …
provtagning, analys och förslag till åtgärder
… sampling points the water flow was measured with a V-notch. Minerogenic and organic sediment samples were also collected and analysed for total concentrations of Cu, Zn, Cd, Fe och As. In the pit lake, water samples were collected at 0-, 2-, 5-, 8 and 12- meter depths. These …
… Chlorella vulgaris. Microorganisms are capable of decomposing a range of organic pollutants and the main focus in previously published studies has been on bacteria and fungi. Microalgae are mostly studied due to their high capacity in biosorbing heavy metals. Removal of organic …
Utvärdering av kapaciteten hos en två-stegs UASB-reaktor för behandling av hushållsavloppsvatten
… 2005. Anaerobic treatment without heating, as a way to reduce the content of organic material in the waste water, consumes less energy than conventional methods. Anaerobic reactors are usually operated at 37°C. It is possible to attain a high COD-reduction at lower temperatures …
… the nitrogen oxides, injection of urea into the boiler is used. Urea is an organic compound of carbon, nitrogen, oxygen and hydrogen. When urea reacts with nitrogen oxides they transform into harmless nitrogen gas and water. In the plant the urea is injected by six lances. The …
… betweenyears, between fields and within fields due to differences in clay and organic matter content,topography and the history of cultivation.The objective of the present work is to review the possibilities to reduce nitrogen leachingby adjusting the nitrogen fertilizer rates …
en jämförelse mellan tre alternativ
… for system 1 were the possibility to market the residue as a certified organic fertilizer whereby the plant nutrients represents a relatively high economical value, and a reduction in global warming emissions due to avoided use of mineral fertilizer. The downsides are large …
