Abstract: The invention describes a method for treating sewage sludge through the treatment steps of hydrolysing (2) the sewage sludge (1) and digesting (11) the hydrolysed sewage sludge (10), which has undergone hydrolysis (2), for the anaerobic treatment of the sewage sludge (1), and through the step of separating phosphate from the at least partially treated sewage sludge (3). Phosphate is separated after the treatment step of hydrolysing (2) and before the treatment step of digesting (11) the hydrolysed sewage sludge (3), wherein the sewage sludge (10), without the phosphate portion separated in the phosphate separation step, is fed to the anaerobic treatment performed through digestion (11).
Type:
Application
Filed:
September 10, 2012
Publication date:
December 25, 2014
Applicant:
P.C.S. POLLUTION CONTROL SERVICE GMBH
Inventors:
Wolfgang Ewert, Michael Sievers, Hinnerk Bormann
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).
Type:
Grant
Filed:
March 6, 2009
Date of Patent:
February 4, 2014
Assignee:
P.C.S. Pollution Control Services GmbH
Inventors:
Wolfgang Ewert, Michael Sievers, Hinnerk Bormann