The oxidation kinetics of manganese in a sandfilled column has been studied. The oxidation pathways can be both chemical and microbiological. The rate limiting step during chemical oxidation of manganese is the autocatalysis of manganese (II). The time to half the manganese(II) concentration from 1,1 to 0,55 mg/l at pH 8,5 was calculated to 30 […]
Författare CARNA PERSSON1, MARIE LINDE, PER WARFVINGE och KENNETH M PERSSON
Nynäshamn community has upgraded the main wastewater treatment plant by adding an activated sludge stage, in order to handle septic sludge emanating from the southern suburban area of Stockholm. The upgraded plant was taken into operation in 2003.The plant was earlier based on a treatment chain containing pre-treatment, chemical precipitation and a constructed wetland. The […]
When sludge bulking occurred in the new wastewater treatment plant for the abattoir in Kalmar, a quick solution to inhibit and harm the filamentous organism Type 021N was to be found. Five different kinds of chemicals (NaOCl, H2O2, FeCl3, PAX-XL60 and Ecofloc) were tested in two short term lab-tests. Each chemical was first tested with […]
The development of drinking water supply in the early industrial cities in Great Britain is reviewed. The special feature of slow sand filtration, that was developed in Glasgow in the very beginning of the 19th century and diffused to the rest of Great Britain during the first half of the 19th century is described in […]
Författare KENNETH M PERSSON
Nyckelord (Keyword) Slow sand filtration, water supply history, London, Glasgow, James Simpson, Thomas Telford.
The strategic choice between different future solutions of sewage treatment in the area and village of Getinge has been evaluated from economical and environmental viewpoints. The study could identify three alternative solutions for the treatment of the sewage, which were compared from operational, economical and environmentalpoints of view. The first alternative, A, described the present […]
Författare MATTIAS SALOMONSSON, MARIE GUNNARSSON,
KLAS VON SETH , CHRISTINA JÖNSSON och KENNETH M PERSSON
Phosphorus release batch tests can be used for evaluation of an activated sludge process with enhanced biological phosphorus removal (EBPR or bio-P). The test method is described and different aspects of the result evaluation are discussed. The concentration of dissolved phosphorus in a sample from the activated sludge is followed during an anaerobic period within […]
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