A method and system for controlling hydrophobic conditions and fouling in water intensive processes
AssigneeKemira Oyj
InventorsMehrdad HESAMPOUR, Roderick ABINET, Marjatta PIIRONEN, Eija KORTE, liris JOENSUU
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Abstract
In a water treatment system, a pretreatment chemical is added to water stream in a pretreatment process including a coagulation, flocculation and separation to reduce amount of dissolved and/or particulate matter in the water stream. Hydrophobic conditions in the water stream are monitored upstream or downstream from adding the pretreatment chemicals. Dosing of the pretreatment chemical to the water stream is controlled based on the monitored hydrophobic conditions. Thereby a membrane fouling in subsequent membrane filtration stage can be minimized.
Claims17
A method of controlling a water treatment process, the method comprising:
- adding at least one pretreatment chemical to a water stream in a pretreatment process including a coagulation step and/or a flocculation step and at least one separation step to reduce amount of dissolved and/or particulate matter in the water stream,
- monitoring hydrophobic conditions in the water stream upstream and/or downstream from said adding the at least one pretreatment chemical, and
- controlling dosing of said at least one pretreatment chemical to the water stream based on at least the monitored hydrophobic conditions.
Use of online hydrophobicity monitoring unit in controlling of a water treatment process.
Dependencies are inferred from the claim text.