Patent · US Active

Method for wastewater treatment and wastewater treatment system

US8641902B2 · kind B2 · utility

2Cited by

6References

28Claims

0Family size

Assignee

P.C.S. Pollution Control Services GmbH · DE

Inventors

Wolfgang Ewert · Hamburg, DE
Michael Sievers · Poughkeepsie, US
Hinnerk Bormann · Vienenburg, DE

Key dates

Filing date	Mar 6, 2009
Grant date	Feb 4, 2014
Priority date	—
Expiry date	Oct 21, 2029

Classification

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

Abstract

The invention relates to a method for wastewater treatment utilizing an anaerobic treatment of primary sludge (PS) in a septic tank (5), and a separate treatment of excess sludge (ÜS). The excess sludge (ÜS) is separated from the primary sludge (PS) before the anaerobic treatment, solubilized in a hydrolysis treatment and liquefied, and subjected to a separate anaerobic treatment independently of the primary sludge (PS).

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