Patent · US Active

Method and device for purification of effluent

US7892431B2 · kind B2 · utility

0Cited by

2References

29Claims

0Family size

Assignee

Papierfabrik August Koehler SE · DE

Inventors

Harald Kraft · Uhingen, DE
Hans-Thomas Armbruster · Altdorf bei Nürnberg, DE
Wendelin Benz · Renchen, DE

Key dates

Filing date	May 26, 2006
Grant date	Feb 22, 2011
Priority date	—
Expiry date	Sep 20, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W10/10
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

The invention relates to a method for the purification of effluent, in particular, effluent from the paper industry, comprising the following method steps: a) aerobic purification of the effluent using activated sludge in an activated sludge tank (1), b) settling of at least a part of the effluent/activated sludge mixture exiting the activated sludge tank (1) in a settling tank (2), c) separation of a part of the effluent/activated sludge mixture exiting the settling tank in a separating device (3) and d) recycling of at least a part of the activated sludge separated off in steps b) and/or c) into the activated sludge tank (1).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.