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Utvärdering av åtgärder för förbättrad vattenkvalitet
… and a sill inlet that prevents water exchange. As an attempt to improve the oxygen levels, bottom water is pumped from Brunnsviken causing aerated surface water to flow back into the basin. The objective of this Master’s thesis was to study the change in dissolved oxygen levels …
… in the plant, and it is therefore of interest to reduce this cost. The oxygen control strategy used at Käppala WWTP is working well from a nutrient removal point of view, but not from an economic one. The last aerobic zones have a very low oxygen consumption during low loading …
… casting. The purpose of this thesis was to closer examine the impact of the oxygen level on inclusions. The questions asked were: ” What was the amount of inclusions at different levels of oxygen” ” What was the size of these inclusions at different levels of oxygen” ” What does …
En studie utförd vid Stockholm Arlanda flygplats
… at Stockholm Arlanda airport to remove or prevent ice on aircrafts. The high oxygen demand of propylene glycol can cause oxygen depletion in rivers downstream from the airport if not collected. Mass balance calculations made by Swedavia indicate that the actual amount of …
Hur kranvattnets kommersiella värde kan höjas
… concepts have been generated during the product design part, and they are oxygenized water and LoveJoyWater. The idea behind oxygenized water is that it will supply the body with additional oxygen to create a sense of relaxation and alertness. However, the analysis proves that …
ett laboratorieförsök
… in ponds from one season to another by keeping a high concentration of oxygen in thepond water. This hypothesis was tested by doing a lab experiment where two systems werecompared according to nitrate concentration. One system had high concentration of oxygen inthe water and one …
Inlösning av syre i vatten
… for information.The project has resulted in manufacturing of a test rig and an oxygen infuser based onmembrane technology. The test rigs purpose was to perform tests on oxygen infusers fordifferent comparison test and performance benchmarks in a in a laboratory provided by …
… two different aeration strategies, by keeping different constant levels of oxygen and by using ammonium-feedback. In this latter test correlations between nitrous oxide emissions and various process parameters were studied. The experiments with different control strategies are …
… process can, in a simple way, be described as follows: micro-organisms breathe oxygen and eat unwanted 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 …
… is to pack the crop well and cover it as soon as possible to exclude oxygen. If this succeeds, the chances of getting good forage that fulfils all requirements for a good hygienic quality are very good. It also minimizes the risk that the feed affects the dairy products in a …
Utvärdering av ny behandlingsmetod
… of influencing parameters. The results showed that if the dust has access to oxygen the Cr(VI) content increases during the first days from a few mg/kg dry substance to over 20 mg/kg dry substance, a level which was maintained during the rest of the experiment period. The …
The main objective of this research was to study how increased arterial oxygenation by the use of Pulsed Inhaled Nitric-Oxide (PiNO) influenced the metabolic and cardiovascular parameters on horses undergoing acute abdominal surgery because of colic. The parameters blood …
en analys av orsaker och effekter
… The dissolving of the organic matter that has been suppressed by the lack of oxygene below water level continues. This means that the ground itself will sink and (i) approaches the ground water level, and (ii) reduces the essential difference in water level in the lowered area …
… of the bottom ash water including: pH, total phosphorus, ammonium, chemical oxygen demand (COD), suspended solids, and bacteria were also carried out. Further, a questionnaire was distributed to investigate how the workers at the MWI plant re°ected on health when working. The …
bestämning av flödesvägar och åtgärdsförslag för optimal fosforbindning vid avloppsrening med reaktiva filter
… sea, which results in unbalanced ecosystems with eutrophication and lack of oxygen. Part of the phosphorus in surface waters is coming from on-site wastewater treatment from scattered households with unsatisfactory purification. Blast furnace slag is a by-product from iron …
