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Mlinar, Stanislava ; Weig, Alfons ; Freitag, Ruth:
Influence of NH₃ and NH₄⁺ on anaerobic digestion and microbial population structure at increasing total ammonia nitrogen concentrations.
In: Bioresource Technology.
Bd. 361
(2022)
.
- 127638.
ISSN 1873-2976
DOI: https://doi.org/10.1016/j.biortech.2022.127638
Abstract
Despite the extensive research dedicated to ammonia inhibition, the effect of NH3 and NH4+ on each anaerobic digestion stage and the associated microorganisms is still not completely understood. In the past, the focus was mainly on methanogenesis and either on NH3 or total ammonia nitrogen (TAN). Here, anaerobic digestion of two defined substrates, namely starch/NH4Cl and casein, was investigated particularly regarding the effects of different NH3/NH4+ ratios on the involved microorganisms. TAN affected bacteria, primarily gram-positive ones, whereas archaea responded largely to the NH3 concentration. These sensitivity differences are attributed to differences in the corresponding cell-membrane structures. A TAN decrease via stripping performed in two full-scale agricultural biogas plants resulted in increased bacterial diversity, with a pronounced increase in the propionate acetogens’ abundance. Based on these data, it is suggested that inhibition can be avoided and processes stabilized in biogas plants by adjusting the NH3/NH4+ ratio, when feeding nitrogen-rich substrates.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Biologie Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Bioprozesstechnik Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Bioprozesstechnik > Lehrstuhl Bioprozesstechnik - Univ.-Prof. Dr. Ruth Freitag Fakultäten Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften Fakultäten > Fakultät für Ingenieurwissenschaften |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie 500 Naturwissenschaften und Mathematik > 570 Biowissenschaften; Biologie 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 19 Jul 2022 07:02 |
| Letzte Änderung: | 01 Jun 2023 12:13 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/70616 |