Effects of ensiling treatments on lactic acid production and supplementary methane formation of maize and amaranth - An advanced green biorefining approach

Publication Type: Journal contribution (peer reviewed)
Authors: Haag, N.L.; Nägele, H.-J.; Fritz, T.; Oechsner, H.
Year of publication: 2015
Published in: Bioresource Technology
Pubisher: Elsevier Ltd.
Band/Volume: 178/
ISBN / ISSN / eISSN: 09608524
DOI: 10.1016/j.biortech.2014.08.048
Page (from - to): 217-225

Abstract

A green biorefinery enables the material and energetic use of biomass via lactic acid and methane production. Different ensiling techniques were applied to maize and amaranth with the aim to increase the amount of lactic acid in the silage. In addition the methane formation potential of the ensiled samples and the remaining solid residues after separating the organic juice were assessed. Treating maize with homofermentative lactic acid bacteria in combination with carbonated lime increased the amount of lactic acid about 91.9%. For amaranth no additional lactic acid production was obtained by treating the raw material. Specific methane yields for the solid residues of amaranth were significantly lower in comparison to the corresponding silages. The most promising treatment resulted in a production of 127.9±4.1gkg^-1 DM lactic acid and a specific methane yield for the solid residue of 349.5±6.6l_Nkg^-1 ODM.

Involved persons

Dr. sc. agr. Hans Oechsner

Involved institutions

State Institute of Agricultural Engineering and Bioenergy

Projects in the course of the publication

Ganzheitliche Optimierung der Biogasprozesskette zur Steigerung der betrieblichen, stofflichen, energetischen und ökologischen Effizienz unter besonderer Berücksichtigung der Produktion eines natürlichen kundenspezifischen Düngemittels (GOBi)