75 uppsatser · sida 3 av 5
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 …
en studie utförd vid Hovgårdens avfallsanläggning i Uppsala
… by sedimentation dams collected from the Hovgården landfill, and alson on sludge water from sludge storage cells. The effects of the five oxidants have been established by analysing the UV absorbance at the wavelengths 253,7 nm and 260,0 nm at different pH values. The UV …
Utvärdering av kapaciteten hos en två-stegs UASB-reaktor för behandling av hushållsavloppsvatten
… a longer contact time between biomass and waste water. In an Upflow Anaerobic Sludge Blanket (UASB) - reactor the microorganisms form granules with excellent sedimentation properties. The granules are floating with the waste water flowing upwards through the reactor. This makes …
The sludgebark and to a certain extent the bark were until a decade ago waste products without any economic value that were thrown away. A number of environmental laws and increcing energy prices have improved the prerequisites for increasing the use of these materials. At …
… 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. The …
provtagning, analys och förslag till åtgärder
… 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 the pit …
Utvärdering av försök att styra det biologiska reningssteget med styrparametern ”nettoslamproduktion”
Detta examensarbete behandlar det biologiska reningssteget vid Stora Enso Fors AB kartongfabrik. Examensarbetet omfattar 20 p och ingår i slutskedet av Magisterutbildningen, 60 p, i Kemiteknik med inriktning industriell ekologi vid Kungliga Tekniska Högskolan i Stockholm. Stora …
… to a heating value of 4,9 GWh for transport of raw material and digested sludge together with 13-14 GWh for process heat and electricity. If the gas replaces petrol the emissions from the lifecycle of the fuel decrease with 5 600-7 400 ton CO2-equivalents. The emissions by the …
Hedesunda reningsverk är beläget i södra delen av Gävle kommun och hanterar avloppsvatten från Hedesunda samhälle och ett fåtal närbelägna byar. Antalet anslutna personer är strax över 1500. Reningsverket byggdes på 1960-talet och byggdes om i slutet av 1990-talet. Vid …
En kombination av termisk och kemisk förbehandling
Vid tillverkning av massa och papper förorenas årligen 505 miljoner kubikmeter vatten som måste renas innan det släpps tillbaka till omgivningen. Vid reningen avskiljs först stora partiklar som sedan avvattnas och förbränns. Vattnet som blir kvar genomgår ytterligare en rening …
… crush technology and methane yield at the co-digestion of food waste and biosludge from paper mills. SS-OFMSW which is either pre-treated in a screw crusher or a Food Waste Mill and a mixture of SS-OFMSW and biosludge from paper mills digested in a semi - continuous wet process …
En fallstudie av Himmerfja?rdsverket
… corresponds to a power of 15 MW. During the treatment processes sludge is separated from the wastewater. The sludge can be used for biogas production by anaerobic digestion. At Himmerfja?rdsverket, 8 million m3 of biogas are produced every year. The reminder from the biogas …
vad kräver livsmedelsbranschen?
… was taken by the Swedish Government in 2005 that 60 % of phosphorous in sewage sludge is to be recycled to arable land before 2015. To make recycling a reality, new solutions have to be found. Federation of Swedish Farmers (LRF) takes an active interest in this issue and has …
rensning av stopp samt uppsamling och attityder
… 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 which …
This thesis work was made for Södra Cell Mörrums bruk in Blekinge. The purpose of the work was to develop a computer model in the simulation program Extend for the removal and balance of organic oxygen consuming substances, measured as COD (Chemical Oxygen Demand), in the new …
