Method and process arrangement for treating reject water, products and use

Kristian Melin; Eliisa Järvelä

Method and process arrangement for treating reject water, products and use

Kristian Melin (Inventor)
, Eliisa Järvelä (Inventor)

BA5202 Chemical process technologies

Research output: Patent › Patent

Abstract

The invention relates to a method and process arrangement for treating reject water. An alkali chemical (2) is added to the reject water (1) for increasing pH, nitrogen is separated in the form of ammonia from the reject water and a mixture (5) comprising nitrogen is formed, a sulfate-containing reject composition (7) comprising at least sodium sulfate is added to the mixture, and sodium salts (10) comprising at least sodium carbonate and/or sodium bicarbonate is precipitated such that at least ammonium sulfate remains in the mixture. Further, the invention relates to the products and their uses and use of the method.

Patent family as of 21.7.2026
FI129224 B, FI20195524 A, WO20254728 A1

Original language	English
Patent number	FI129224 В
IPC	B01D53/50
Priority date	17/06/19
Filing date	17/06/19
Publication status	Published - 30 Sept 2021
MoE publication type	H1 Granted patent

Cite this

@misc{71cba7e4bda8408ca2a33e27bc391a6e,

title = "Method and process arrangement for treating reject water, products and use",

abstract = "The invention relates to a method and process arrangement for treating reject water. An alkali chemical (2) is added to the reject water (1) for increasing pH, nitrogen is separated in the form of ammonia from the reject water and a mixture (5) comprising nitrogen is formed, a sulfate-containing reject composition (7) comprising at least sodium sulfate is added to the mixture, and sodium salts (10) comprising at least sodium carbonate and/or sodium bicarbonate is precipitated such that at least ammonium sulfate remains in the mixture. Further, the invention relates to the products and their uses and use of the method. Patent family as of 21.7.2026 FI129224 B, FI20195524 A, WO20254728 A1",

author = "Kristian Melin and Eliisa J{\"a}rvel{\"a}",

year = "2021",

month = sep,

day = "30",

language = "English",

type = "Patent",

note = "FI129224 В; B01D53/50",

}

TY - PAT

T1 - Method and process arrangement for treating reject water, products and use

AU - Melin, Kristian

AU - Järvelä, Eliisa

PY - 2021/9/30

Y1 - 2021/9/30

N2 - The invention relates to a method and process arrangement for treating reject water. An alkali chemical (2) is added to the reject water (1) for increasing pH, nitrogen is separated in the form of ammonia from the reject water and a mixture (5) comprising nitrogen is formed, a sulfate-containing reject composition (7) comprising at least sodium sulfate is added to the mixture, and sodium salts (10) comprising at least sodium carbonate and/or sodium bicarbonate is precipitated such that at least ammonium sulfate remains in the mixture. Further, the invention relates to the products and their uses and use of the method. Patent family as of 21.7.2026 FI129224 B, FI20195524 A, WO20254728 A1

AB - The invention relates to a method and process arrangement for treating reject water. An alkali chemical (2) is added to the reject water (1) for increasing pH, nitrogen is separated in the form of ammonia from the reject water and a mixture (5) comprising nitrogen is formed, a sulfate-containing reject composition (7) comprising at least sodium sulfate is added to the mixture, and sodium salts (10) comprising at least sodium carbonate and/or sodium bicarbonate is precipitated such that at least ammonium sulfate remains in the mixture. Further, the invention relates to the products and their uses and use of the method. Patent family as of 21.7.2026 FI129224 B, FI20195524 A, WO20254728 A1

UR - https://fi.espacenet.com/publicationDetails/biblio?II=0&ND=3&adjacent=true&locale=fi_FI&FT=D&date=20201224&CC=WO&NR=2020254728A1&KC=A1

M3 - Patent

M1 - FI129224 В

Y2 - 2019/06/17

ER -

Method and process arrangement for treating reject water, products and use

Abstract

Other files and links

Fingerprint

Cite this