169 uppsatser · sida 5 av 12
en analys av orsaker och effekter
There are records of lowering of the water level in a lot of the Swedish lakes from the middle of the 1700th century. The aim was gaining more areable land to meet the needs of more food to support the expanding population. In areas with top soil which contents of clay or loam …
An excessive input of nutrients to lakes and other water bodies has created a problem with eutrophication in Sweden. Untreated, or partially treated, domestic sewage is a major source for discharge of phosphorus (P), which is the nutrient most frequently responsible for …
This master thesis is developed based on the desire of the water and sewage department in the municipality of Karlskrona. The department, which vouches for the quality of produced drinking water and sewage cleaning, was in need of help dealing with risk analysis. The water and …
… drought-sensitive crops. Potatoes are often grown on sandy soils with poor water-holding capacity. Factors such as total yield, tuber size distribution and quality defects are negatively affected when water becomes insufficient. Wide beds have a more flat top which leads to more …
en utredning om lokaliseringen av Lotsbroverkets utloppsledning
This report is commissioned by the Water and Sewage Agency in The City of Mariehamn, Åland. The basic aim is to investigate positive or negative effects of a relocation of the sewage pipe from a wastewater treatment plant, Lotsbroverket. The environmental licence of …
växthusgaser, energi- och resursanvändning i modellstudie
The aim of this study was to evaluate the effects on a simulated wastewater plant regarding GHG emissions and use of energy and resources when implementing source separated wastewater systems. The effects were studied for different restrictions of effluent quality and for …
… from Stockholm Vatten AB as a part of a project developing new waste water treatment techniques. The goal of the theisis has been to evaluate an anaerobic membrane bioreactor for treatment of waste water from Hammarby Sjöstad. The bioreactor has not been heated and the main …
kan anlagda våtmarker med vattenrening som huvudsyfte bidra till naturvård och biologisk mångfald?
… The wetland Vattenparken was constructed 1999 ? 2000 for treatment of surface water. During the construction a big effort was made to ensure the benefits for biodiversity, mainly through planting of wetland vegetation and introduction of wetland plant species. This study …
… laboratory use offers a simple way of testing different algae. Using drainage water to cultivate algae in a photobioreactor could offer a way to enhance nutrition use efficiency in agriculture. This thesis consists of two experiments, growing microalgae in drainage water from a …
från kvarterspark till stadsdelspark
… laboratory use offers a simple way of testing different algae. Using drainage water to cultivate algae in a photobioreactor could offer a way to enhance nutrition use efficiency in agriculture. This thesis consists of two experiments, growing microalgae in drainage water from a …
ett småskaligt försök
… laboratory use offers a simple way of testing different algae. Using drainage water to cultivate algae in a photobioreactor could offer a way to enhance nutrition use efficiency in agriculture. This thesis consists of two experiments, growing microalgae in drainage water from a …
Kväve- och fosforrening i anlagda våtmarker.
A water treatment unit consisting of two aeration basins, two settling tanks, a residence basinand a horizontal subsurface flow wetland were used to treat wastewater from an eggprocessing factory in Brazil. The aim of this paper was to determine the efficiency of thesystem in …
… animal and plant life. One of the reasons for this problem is that the waste water treatment techniques are not optimized to clear waste water from its pharmaceuticals contain. In this master thesis four Swedish treatment wetlands were studied, and their ability to reduce …
Aluminium sulphate (Al2(SO4)3) is usually added during the drinking water treatment processin order to precipitate organic and inorganic material, resulting in aluminium-based drinkingwater treatment residual sludge (WTR). Since 2003 Swedish law no longer permits WTR tobe …
… was to improve the sewage plant in Främby by con-necting the contaminated water from the mining area with the waste water though a chemical treatment. In the year 1987 the treatment successfully began and the same year the Swedish government financed a delegation, called …
