75 uppsatser · sida 2 av 5
… 0,15 mg/L. It was, however, hard to obtain a stable process and to keep a good sludge quality during the period. Primary sludge was hydrolysed to increase the amount of easily degradable organic material into the biological step of the process. The hydrolyse had a high …
en bedömning av intresset för nya näringsrika produkter
Sewage sludge contains plant nutrients and has earlier been utilised as fertilizer to cropland. Unfortunately not only plant nutrients but also heavy metals, pathogens and organic contaminants tend to accumulate in sludge. The suitability to use sewage sludge in agriculture has …
Membrane bioreactors- A future solution at Lundåkra wastewater treatment plant?
… that could be an alternative to the future expansion with conventional active sludge treatment at Lundåkra wastewater treatment plant (WWTP) in the proximity of Landskrona, Sweden.The results showed that the surface demand in the biological treatment will be reduced with 67% …
Chemical stabilization of mine waste with sewage sludge and calcium carbonate residues
Chemical stabilization of mine waste from Ljusnarsbergsfältet with sewage sludge and calcium carbonate residuesMine waste from Ljusnarsbergsfältet in Kopparberg, Sweden, is considered to constitute a great risk for human health and the surrounding environment. Some of the waste …
… and try to chemically stabilize the waste rock with a mixture of sewage sludge and calcium carbonate. The drawback of using organic matter is the risk that dissolved organic matter can act as a complexing agent for heavy metals and in this way increase their mobility. An …
… substances. The environment in which the micro-organism lives is known as sludge and the correct amount of oxygen available in the sludge is important for the decomposition to be effective. The oxygenation of the sludge alone stands for about 30% of the plant’s energy …
… and PFUnA. By comparing the contents of perfluorinated substances detected in sludge from waste water treatment plants, with calculated emissions of PF from clothes, I have investigated whether or not the all weather clothes are a major source of emission of perfluorinated …
… profitable. The economic gain depends on the ability to sell the residue sludge or getting a subsidy. With sales of the sludge, profitability is achieved at a price of 70 SEK/ton sludge. The conclusion is that the opportunity of a biogas plant on Utö is good, but requires a …
… two metals that do not fulfill this requirement. The silver concentration in sludge decreased during the last decade, however the last few years, it has leveled off. The bismuth concentration has increased significantly since 2005. The aim of this study was to explore the types …
Källor till förhöjda halter i slam?
… two metals that do not fulfill this requirement. The silver concentration in sludge decreased during the last decade, however the last few years, it has leveled off. The bismuth concentration has increased significantly since 2005. The aim of this study was to explore the types …
… the composition of domestic waste, industrial waste and two different types of sludge. The work was performed at the request of Norrköping Miljö & Energi, due to the planning of an incineration plant. The inventory of the waste was performed through inspection of environmental …
… of organic mate-rial. In Sweden, biogas predominately comes from sewage water sludge and landfills or from organic waste of households and industries. Small scale digestion plants at farms are espe-cially expected to contribute to increased biogas production in the future …
… complete coverage of results and conclusions i.e. more reliable results, sludge samples should be collected and taken at different times per day and the influent rate should be investigated.In this work mass balance has been set up in order to illustrate and identify the factors …
… material, resulting in aluminium-based drinkingwater treatment residual sludge (WTR). Since 2003 Swedish law no longer permits WTR tobe deposited in lakes, and there is an interest to explore the possibility to utilize WTR as soilamendment. The aim of this study was to examine …
… connected. The wastewater is collected at treatment plants where a nutritious sludge is produced. The sludge does not only contain nutrients, but also hazardous substances originating from different activities in society. To reduce the flow of hazardous substances to treatment …
