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AssigneeKemira Oyj
InventorsKaj Jansson, Iiris Joensuu, Marjatta Piironen, Jukka-Pekka Sirviö, Tapio Yrjänäinen
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The invention relates to a method and system for treating an aqueous stream having a first flow rate and containing solid matter exhibiting first settling properties, the method comprising adding a modifying agent to the aqueous stream at an addition rate sufficient to change the first settling properties of the aqueous stream to obtain a modified aqueous stream having solid matter exhibiting second settling properties different from the first settling properties; taking batchwise samples of the modified aqueous stream to a settling vessel having a volume; determining a settling property of the solid matter of the samples in the settling vessel; and conducting the modified aqueous stream to a separation unit in which solid matter is separated from the modified aqueous stream. The invention provides a convenient way of monitoring and/or controlling aqueous streams conducted for example to purification processes.
A method of treating an aqueous stream having a first flow rate and containing solid matter exhibiting first settling properties, comprising
The method according to any of the preceding claims, comprising depending on the determined settling property of the solid matter of the sample in the settling vessel, controlling the addition rate and/or type of the modifying agent.
A water treatment system comprising
Dependencies are inferred from the claim text.