206 uppsatser · sida 9 av 14
Populärvetenskaplig sammanfattning: Kvävebelastningen på sjöar och hav har ökat markant de senaste tiotal åren. Jordbruket står för ca 50 % av de svenska kväveutsläppen som människan bidrar till. En ökad kvävebelastning på haven kan leda till övergödning, vilket får en stor …
… the soil water you don’t risk a water stress on the plants and leaks of nitrogen. The results off soil moisture sensors accuracy is that the usual sensor is good enough to decide when it’s time to start irrigation and the amount of water. The accuracy of the results depends on …
… as forages in organic production because of the ability of legumes to fixate nitrogen. According to the rules of KRAV, a maximum of 40 per cent of the daily intake of dry matter can be provided as concentrate. However, during the first three months of lactation the maximum …
… the traffic during the period of building and emissions of carbon dioxide and nitrogen oxides from the transportation of rock masses during the building period. These costs are valued to approximately 16,7 million Swedish crowns. The income is 7 billion Swedish crowns and …
Förutsättningar för återföring av näringsämnen i humanavlopp till odlad mark; Norrköpings kommun som exempel
Studien undersöker om återföring av näringsämnen, huvudsakligen makronäringsämnena kväve och fosfor, från humanavlopp i Norrköpings kommun kan komma att ske på ett sätt som är i linje med naturvetenskapliga kretsloppsprinciper. Frågan om återföring av näringsämnen och dess …
… However the permeate exceeds the emission limits (phosphorus: 0,15 mg/l, nitrogen: 6 mg/l) while concentration in the concentrate is still too low. The limiting factor seems to be phosphorus. This could be solved with pre-precipitation of phosphorus or by reconstructing the RO …
… pre-treatment, UASB (Upflow Anaerobic Sludge Blanket), aerobic polishing for nitrogen reduction, a drum filter and reverse osmosis. The evaluation is performed by analysis of water sample taken from the whole process. It is difficult to make any conclusions about the process as …
en biologisk bekämpningsmetod mot ogräs
… was the next most coarse one of all. In both trials it was shown that the nitrogen fixing species had the best germination and gave the best ground cover. Above all Medicago lupulina and the white clover variety Trifolium repens Undrom were outstanding. The trials illustrate the …
en fallstudie
… the manure at the own area. That should give the impact which the purchase of nitrogen-manure can decrease with 50 570 SEK per year. The need of work should increase with 1 625 hours per year, 75 percent of a full-timeduty. The impact of that should be that two people will be …
… been large, around 99 % regarding organic matter and phosporus and 93 % for nitrogen, making the system suitable for waste water treatment except for high power consumption, around 2 kWh/m3. The production of methanegas has worked although it has been quite low, with average …
Identifiering av problem samt förslag på åtgärder
… by high concentrations of BOD and SS. Large releases of oils and greases, nitrogen and phosphorus are also fairly common, as are too high or too low pH levels. The food industry is the most contaminating sector, but also tanneries have great problems with effluents exceeding …
… be associated with hypermetabolism and hypercatabolism, resulting in negative nitrogen balances. The results reveal increased energy expenditure and assessments of needs energy requirements at the TBI patients. This study determining the route of feeding: enteral versus …
? en värdering av miljöeffekter
… change in question is the change in discharge levels of carbon dioxide (CO2), nitrogen oxides (NOx), sulphur dioxide (SO2) and particle matter. It is shown that a heat and power plant solution provides the highest value of environmental change. In addition to the calculations …
… Microorganisms in the biologic cleaning construction need to assimilate nitrogen. There are environments free from oxygen in the cleaning construction. Microorganisms can reduce nitrate in environments free from oxygen. At the implementation was a labmodel built of the two first …
… for precision agriculture, such as yield-mapping, precision liming, the Yara Nitrogen Sensor and site-specific fertilization with phosphorous and potassium. They were also asked to describe the way in which the counselling in Swedish agriculture is used and also about it's …
