206 uppsatser · sida 5 av 14
… of particles remains the same. The increased content of easy available nitrogen is about 40 tons, it can replace about 5 % of the nitrogen supplied as synthetic fertilizer. The contribution to the nitrogen resource by digested sludge is greater than its contribution to the …
… questions were as following; do the environmental pondsdecrease the leakage of nitrogen and phosphorus into Hanöbukten, do the ponds decrease theuse of groundwater in Sölvesborgs Municipality and are there any restrictions on what thewater in the ponds is allowed to be used for …
… analyses of important parameters i.e. gas production and composition, carbon/nitrogen-ratio, total solids and pH have been performed during and after the digestion tests. The best results (25-28 % methane) were obtained when 5-15 % beets were added to the digester. This shows …
… which were estimated as the most important to reduce, were iron and nitrogen. The iron would react with the oxygen-rich water in the aerated pond and precipitate to ferric-hydroxide and than settle in a calm zone of the pond. The rest of it would be reduced by filtration in the …
… thisprocess by reducing the amount of concentrate without releasing more nitrogen tothe environment and to examine if density could be used as a measurement of whenthe process should be ended.To create a foundation for optimization six test cycles were conducted with samples …
… The aim of this study was to investigate and characterize how organic nitrogen affects the first emergence and formation of the root system in maturated and germinated Norway spruce somatic embryos and plants. The present study suggests that organic nitrogen (arginine) interacts …
En studie för att identifiera områden för prioritering av åtgärder
… are affected by eutrophication. Nyrebäcken has the highest concentrations of nitrogen and phosphorus in the mainstream, then Skintan and last Vinån. Vinån is much less affected by phosphorus than the other watercourses, which may depend on the surrounding landscape and that the …
… a demand on WWTP´s to alter eutrophication in aquatic systems through better nitrogen and phosphorus removal. An increasing number of WWTP´s have acquired biological nitrogen and phos-phorus removal. A by-product of this type of biological treatment is the formation of nitrous …
The Swedish boreal forests are limited by nitrogen (N) availability. While biological N2 fixation by cyanobacteria hosted by pleurocarpous feather mosses are important sources of N input to natural boreal forest ecosystems, little is known about the patterns of N2 fixation in …
… components was created for Eucalyptus urophylla. The examined nutrients were nitrogen, phosphorus and potassium. The nutrient budget was created for a control and a fertilized treatment which had been fertilized with; 830 kg ha-1 nitrogen, 408 kg ha-1 phosphorus and 736 kg ha-1 …
Kväve- och fosforrening i anlagda våtmarker.
… The aim of this paper was to determine the efficiency of thesystem in reducing nitrogen, phosphorus, BOD5 and TSS (among other parameters) andgetting a further understanding on different kinds of constructed treatment wetlands as well astheir nitrogen and phosphorus removal …
växthusgaser, energi- och resursanvändning i modellstudie
… This meant increasing restrictions on effluent load of ammonium and total nitrogen, which were reached by adjusting control parameters such as aeration, internal recycle flow, carbon addition etc. Thus the same effluent load of ammonium and total nitrogen were reached for all …
rensning av stopp samt uppsamling och attityder
… blockages. The collected urine solution from Nytorgsgatan contained 2.8 g of nitrogen, 0.22 g of phosphorus and 0.68 g of potassium per litre. These amounts correspond to 3.4 g of nitrogen, 0.27 g of phosphorus and 0.82 g of potassium per person per day and corresponded to 46 …
… practice in forest management to optimise tree production. Experiments with nitrogen fertilisation have shown that the volume growths of the tree and litter supply have increased after fertilisation. There are also reports about the negative effects nitrogen fertilisation has on …
… box method”. In the laboratory analyse ammonia was defined as percent of total nitrogen in the samples. The tested samples had a very high level of ammonia in percent of the total nitrogen. In this project information has been collected about the ration of fertiliser and manure …
