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Influence of mixing and sludge volume on stability, reproducibility, and productivity of laboratory-scale anaerobic digestion

Titelangaben

Mlinar, Stanislava ; Weig, Alfons ; Freitag, Ruth:
Influence of mixing and sludge volume on stability, reproducibility, and productivity of laboratory-scale anaerobic digestion.
In: Bioresource Technology Reports. Bd. 11 (2020) . - 100444.
ISSN 2589-014X
DOI: https://doi.org/10.1016/j.biteb.2020.100444

Abstract

Anaerobic digestion processes were compared in multiple reactors using glucose and starch as substrates. For reproducibility studies, five reactors were run in parallel as consecutive 7d-batches and supplied with increasing amounts of starch (2 to 13 g L−1). For concentration < 10 g L−1, production of biogas and organic acids as well as the population structure changed but remained similar, while populations split and statistically significant differences in metabolic intermediate concentration and biogas composition/volume were observed at higher starch concentrations. Based on this reproducibility study, the influence of sludge volume and mixing intensity were investigated using reactors with working volumes of 0.75 L and 1.5 L, with and without mechanical mixing. Mixing positively influenced reaction rates at lower substrate concentrations (up to 4 g L−1), while a negative influence on the process stability was observed at higher concentrations. In general, the larger reactors showed better productivities and stabilities than the corresponding smaller ones.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Anaerobic digestion; Reproducibility; Mixing; Productivity; Geometry
Institutionen der Universität: Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Biologie
Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Bioprozesstechnik
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Bioprozesstechnik > Lehrstuhl Bioprozesstechnik - Univ.-Prof. Dr. Ruth Freitag
Graduierteneinrichtungen > TAO-Graduiertenkolleg Energieautarke Gebäude
Graduierteneinrichtungen
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 570 Biowissenschaften; Biologie
Eingestellt am: 29 Mai 2020 08:37
Letzte Änderung: 01 Jun 2023 12:14
URI: https://eref.uni-bayreuth.de/id/eprint/55187