Effects of mechanical treatment of digestate after anaerobic digestion on the degree of degradation

Publication Type: Journal contribution (peer reviewed)
Authors: Lindner, J.; Zielonka, S.; Oechsner, H.; Lemmer, A.
Year of publication: 2015
Published in: Bioresource Technology
Pubisher: Elsevier Ltd.
Band/Volume: 178/
ISBN / ISSN / eISSN: 09608524
DOI: 10.1016/j.biortech.2014.09.117
Page (from - to): 194-200

Abstract

The aim of this study was to increase the biogas production from different substrates by applying a mechanical treatment only to the non-degraded digestate after the fermentation process in order to feed it back into the process. To evaluate this approach, digestates were grounded with a ball mill for four different treatment time periods (0, 2, 5, 10. min) and then the effects on the particle size, volatile organic substances, methane yield and degradation kinetic were measured. A decrease of volatile fatty acids based on this treatment was not detected. The mechanical treatment caused in maximum to a triplication of the methane yield and to a quadruplicating of the daily methane production.

Involved persons

Involved institutions

State Institute of Agricultural Engineering and Bioenergy

Projects in the course of the publication

Entwicklung von Sensortechnik und Grundlagen einer flexiblen lastabhängigen Steuerung der Intermediatbildung in zweiphasigen Biogasprozessen unter Berücksichtigung einer vollständigen Substratausnutzung (Elast2P)

Further Information

Verbund-Homepage