The ability of conventional equipment intended for removing Fe and Mn to also remove 222Rn, 226Ra, 234,238U, 210Pb and 210Po from private well water was examined at 12 houses in Finland. The operational principles of the equipment were based on aeration and filtration, ion exchange or manganese greensand filtration. The results indicated that 222Rn removal […]
Författare Pia Vesterbacka and Laina Salonen
Nyckelord (Keyword) natural radionuclides, drinking water treatment, Fe and Mn removal
The EU framework directive states that all water bodies within the union should achieve good ecological status 2015. Reducing discharges from on-site wastewater systems is identified as an important means to ameliorate the quality of Swedish waters. This article presents a tool, VeVa River Basin, developed to assess the environmental impact from sewage systems in […]
Författare Caroline Holm, Erik Kärrman, Åsa Erlandsson,
Mats Johansson and Anders Larsson
The capacity for biofilm attachment and activity of 20 low cost materials with little environmental impact (leftovers, byproducts or reusable waste materials) were investigated using two denitrifying biomarker organisms, Comamonas denitrificans 110 and Brachymonas denitrificans B79, and the non-denitrifying strain E. coli K12. The amount of attached biofilm was indirectly measured by analyzing the denitrification […]
Författare Sofia Andersson, Mirja Nilsson, Gunnel Dalhammar and Gunaratna Kuttuva Rajara
The Oxidation Ditch has played a very important role as a foregoer for a number of low load activated sludge systems in the water industry. Today different models are found around the world. The ditch system developed in the late 1950’s originated in the Netherlands. Early Swedish research and development work took place in the […]
Well waters and women’s hair from acid, and an alkaline area, were analysed on about 40 elements and ions in 1997. The alkaline waters and hair had significantly higher concentrations of e.g. Ca, Mo and Se. In april 2006, 30 women from the acid area, northern Scania, southern Småland and southern Älvsborg counties, and 30 […]
This paper presents how super critical water oxidation (SCWO) performs on the iron rich sludge from the drinking water treatment plant Ringsjöverket. The pilot-test shows that the SCWO-technique is capable of treating the sludge from Ringsjöverket. During the pilot- test all organic material were oxidized while the rest precipitated as ferric oxide crystals. Chromium and […]
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