Process for the anaerobic biological purification of wastewater

US4551250A · kind A · utility

Assignee

• Linde GmbH · DE

Inventors

• Manfred Morper · Gauting, DE
• Uwe Fuchs · Munich, DE

Key dates

• Filing date: Jul 26, 1984
• Grant date: Nov 5, 1985
• Expiry date: Jul 26, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W10/10
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

In a process for the anaerobic biological purification of wastewater containing organic pollutants, the wastewater to be purified is conducted through two series-connected reactors (2 and 5) operated under anaerobic conditions. In order to achieve a shortening of the residence time for the wastewater to be purified and thereby a savings in total reactor volume, the pollutants contained in the wastewater, which are present partially in the undissolved, partially in the macromolecular state and are only slowly metabolizable under anaerobic conditions, are retained in the first reactor (2) by means of a filter medium (3) arranged in the first reactor (2). On the other hand, pollutants initially present in the dissolved condition in the wastewater and which are readily degradable by anaerobic microorganisms, are further conducted directly through the first reactor, without substantial conversion, into the second reactor (5) through a connecting conduit (4). In the first reactor (2), the residence time of only the slowly metabolizable pollutants is determined to be sufficient so that the latter are degraded to low-molecular, dissolved fragments. Subsequently, the dissolved fragments are…