Kemira Oyj

Fazlollah Azarnoush

Sakari Halttunen

Outi Gronfors

Mehrdad Hesampour

Esko Tirronen

Joonas Likander

Jan Pavlicek

Bengt Hansen

Outi Grönfors

Krister Eskilsson

Stig Gunnarsson

Roger Bårström

Petteri Suominen

Jeffrey Campbell

Hanna-Mari Kangaslahti

Roger Barstrom

Outi GRÖNFORS

The present embodiments generally relate to compositions and methods for the treatment of fluids in need of treatment, such as, for example, industrial wastewaters. The compositions and methods for treating the fluids in need of treatment generally comprises the use of one or more stable ferrous products in amounts effective to treat said fluids.

Compositions and methods for treating wastewater

The present invention concerns a process for recovering phosphates from wastewater by adding to the wastewater at least one organic coagulant or polymer in a mechanical treatment step that leaves dissolved phosphorus in the water phase, separating a mechanical sludge from the treated wastewater, preferably by sedimentation, flotation or filtration, carrying the phosphorus-containing treated wastewater in a post-treatment step, where at least one chemical precipitant is added to precipitate the dissolved phosphate into solid phosphates, and separating the solid phosphates from the treated wastewater to recover the phosphates.

Recovery of phosphorus compounds from wastewater

The present invention relates to a composition for treatment of wastewaters in a membrane bioreactor comprising a mixture of inorganic coagulants and organic water soluble polymer(s), wherein the inorganic coagulants are selected from iron and/or aluminium containing compounds and the organic water soluble polymers are selected from the group consisting of anionic, cationic, nonionic polymers, polysaccharides and polyphenolic compounds and any combination thereof. The present invention further relates to a method for treating of wastewaters in a membrane bioreactor, and uses thereof.

Phosphorus precipitation and membrane flux in membrane bioreactors

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Espoo, Finland

Fazlollah Azarnoush