Removal of organic matter from surface water during coagulation with sludge flotation and rapid filtration - a full-scale technological investigation

Water Science and Technology : a Journal of the International Association on Water Pollution Research
Alina Pruss

Abstract

Coagulation with sludge flotation and rapid filtration was selected as a surface water treatment technology to be optimised with a full-scale investigation, which was carried out in Poland between August and October 2013. The river water treated was characterized by low alkalinity, high-temperature variability and a high organic matter content. In the course of technological studies, the processes of coagulation with sludge flotation and rapid filtration were analysed. The studies were performed in the most adverse conditions for the applied technology i.e. during the period of algal bloom and subsequent decomposition of dead plankton. Throughout the study, the river water contained mainly dissolved organic matter, with occasional increases in the concentration of the undissolved fraction during algal bloom. The undissolved total organic carbon (TOC) fraction was effectively removed through coagulation while small doses of ClO₂added prior to coagulation enhanced the process. The process of coagulation using high-coagulant doses at pH = 6.5 did not provide a reduction in the TOC value below the level of 4 mg C/L required for treated water. The effect was achieved by adding powdered activated carbon (PAC) before the filters. The ...Continue Reading

References

Nov 27, 2002·Water Research·Brian BoltoKathryn Linge
Jul 17, 2010·Advances in Colloid and Interface Science·Anu MatilainenMika Sillanpää
Mar 10, 2015·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Alina Pruss

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Citations

Mar 10, 2015·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Akintunde BabatundeGuoren Xu

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