The interest in testing of water and wastewater for toxic compounds has increased in the last few years with rsing pollutant levels from industry and with rising sensibility towards environmental problems. In order to get an early warning signal of environmental conditions the use of unicellular organism are recommended since they respond quickly and are […]
Sweden has implemented measures for reducing nitrogen loads to the Baltic Sea since the beginning of 1980s with an aim of doing this in a cost effective way. Cost effective nitrogen reduction is defined as minimum cost for achieving prespecified nitrogen reductions. The costs of measures are then determined by the cost at the location […]
The possibility to optimize a landfill leachate treatment plant in order to reduce the lead content by precipitation has been investigated. The precipitation takes place when an ash cell leachate is mixed with a biocell leachate in a treatment plant. The influence of precipitation by pH, leachate flows and aeration was studied. Standard operational conditions […]
Författare A. ANDERSSON, M. FAIGNANT and K. M. PERSSON
Nyckelord (Keyword) Landfill leachate, lead precipitation, pH, operational parameters, ash, alkalinity, heavy metal.
Detailed knowledge of groundwater discharge areas is needed, among others, in those cases where polluted groundwater may threaten surface water quality. We present a method of studying the discharge areas by sampling shallow groundwater with mini-piezometers and measuring water conductivity and/or hydraulic head. Two case studies from the rivers of Björkaån near Sjöbo and Braån […]
Författare VLADIMIR VANEK
Nyckelord (Keyword) groundwater-surface water relationship, discharge areas, mini-piezometer, water conductivity, Sjöbo, Teckomatorp
A newly developed technology for nitrogen removal from ammonium-rich streams comprises two biological steps. In the first step, about half of the ammonium is oxidized to nitrite (partial nitritation) and in the second one, the remaining ammonium reacts with the formed nitrite into nitrogen gas (Anammox; anaerobic ammonium oxidation). The system was studied in a […]
Författare BEATA SZATKOWSKA, ELZBIETA PLAZA, JOZEF TRELA and BENGT HULTMAN
Pilot plant-scale experiments have been carried out to study a new technology for nitrogen removal from digester supernatant. The plant comprises two parallel lines, which now operate as a two-step process. Two pilot plant reactors (each volume of 2 m3) were filled with Kaldnes rings up to 50 % of their volume. In the First […]
Författare JOZEF TRELA, ELZBIETA PLAZA, BEATA SZATKOWSKA, BENGT HULTMAN, JAN BOSANDER och ALF-GÖRAN DAHLBERG
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