Routine cleaning of water mains is commonly employed by water utilities around the world as a proactive means of managing common water quality issues. When employed correctly, mains cleaning can be effective in removing loosely deposited sediments that can cause water discolouration. Despite its long history in the water industry, water supply practitioners continue to […]
Författare Sandra Kjellberg, Asoka Jayaratne, Jan Vreeburg,
Nishal Sukumaran, Jasper Verberk
Water supply in Växjö municipality has since 1887 been based on surface water from Helga lake. A water treatment plant was built in 1957 and was extensively reconstructed in 1969 but there are still problems to accomplish with drinking water quality, mainly related to temperature, smell and taste, managanese and aluminum rest. Present water consumption […]
Författare Nasik al-Najjar
Nyckelord (Keyword) Ground water, infiltration, water supply, water treatment, Växjö municipality
Lake Østensjøvannet is a shallow hypertrophic lake situated about 30 km south of Oslo. The water quality in the lake during the last hundred years has deteriorated greatly. The main reason for this is supply of wastewater and drainage from agricultural activities. Investigations in the summers of 1977 and 1978 indicated very high internal phosphorus […]
Författare Olav Grøterud & Ståle Haaland
Nyckelord (Keyword) Photosynthesis, blue-green bacteria, high pH, lake sediments, phosphorus release, resuspension
The demand for water increases with population and economic growth. Water that in many cases not is available. Reclaimed water for irrigation has been used for a long time, but in urban areas with water scarcity, advanced treated wastewater has now become an alternative for production of potable water. Extreme situations demand ingenious solutions, solutions […]
Författare LENA FLYBORG och KENNETH M PERSSON
Nyckelord (Keyword) Multiple barriers, indirect, direct, planned water reuse
Författarna drar en slutsats att kraven i EG:s ramdirektiv för vatten, som det genomförts i Sverige, inte är rimliga. Slutsatsen är baserad på en rad felaktiga antaganden. Författarna bortser mer eller mindre från den kommande samverkansprocess som föregår de viktigare besluten inom vattenförvaltningen. De bortser även från de möjligheter till undantag från kravet på god […]
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