Key factors for growth and phosphate uptake by Acinetobacter tjernbergiae.
- 1Chair of Bioprocess Engineering, Department of Biotechnology, Technische Universität Berlin, Ackerstraße 76 ACK24, D-13355, Berlin, Germany.
- 2Department of Chemistry and Bioscience, Aalborg University Esbjerg, Niels Bohrs Vej 8, DK-6700, Esbjerg, Denmark. [email protected].
Abstract
Phosphorus-containing fertilisers are essential for global food production but depend on finite phosphate rock reserves. Recovery of phosphorus from waste streams, such as those in wastewater treatment plants, will be required to follow future regulations. Certain Acinetobacter spp. can accumulate 24-30% (w w⁻¹) of phosphate intracellularly, making them promising candidates for microbial phosphorus recovery. However, previous studies have reported insufficient biomass formation to enable rapid phosphate uptake. Therefore, this work investigated key factors of biomass generation and phosphate uptake of Acinetobacter tjernbergiae in an empirical study. Increasing iron concentration by 1 mg L⁻¹ enhanced growth six-fold in shake flask cultivations. A maximum biomass concentration of 12 ± 0.7 g L⁻¹ was achievable during 14 h of bioreactor cultivation. The maximum volumetric phosphate uptake rate (rS,P) reached 280.2 ± 40.8 mg (L h)⁻¹, the highest value reported so far for Acinetobacter spp., while specific rates of up to 41.0 ± 1.1 mg (g h)⁻¹ were achieved. It was further shown that A. tjernbergiae exhibits both polyphosphate accumulation and the overplus phenomenon. Moreover, phosphate uptake was strongly correlated with carbon uptake, while carbon absence resulted in phosphate release.
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BibTeX
@article{bruck2026factors,
title = {{Key factors for growth and phosphate uptake by Acinetobacter tjernbergiae.}},
author = {Jan Brück and Simon Täuber and Leonie Ackermann and Henry Schittkowski and Peter Neubauer and Stefan Junne},
journal = {Applied microbiology and biotechnology},
year = {2026},
month = aug,
doi = {10.1007/s00253-026-13992-x},
url = {https://europepmc.org/article/MED/42967961},
note = {CC BY},
}
RIS
TY - JOUR
TI - Key factors for growth and phosphate uptake by Acinetobacter tjernbergiae.
AU - Jan Brück
AU - Simon Täuber
AU - Leonie Ackermann
AU - Henry Schittkowski
AU - Peter Neubauer
AU - Stefan Junne
PY - 2026
DA - 2026/08/05
JO - Applied microbiology and biotechnology
DO - 10.1007/s00253-026-13992-x
UR - https://europepmc.org/article/MED/42967961
AB - Phosphorus-containing fertilisers are essential for global food production but depend on finite phosphate rock reserves. Recovery of phosphorus from waste streams, such as those in wastewater treatment plants, will be required to follow future regulations. Certain Acinetobacter spp. can accumulate 24-30% (w w⁻¹) of phosphate intracellularly, making them promising candidates for microbial phosphorus recovery. However, previous studies have reported insufficient biomass formation to enable rapid phosphate uptake. Therefore, this work investigated key factors of biomass generation and phosphate uptake of Acinetobacter tjernbergiae in an empirical study. Increasing iron concentration by 1 mg L⁻¹ enhanced growth six-fold in shake flask cultivations. A maximum biomass concentration of 12 ± 0.7 g L⁻¹ was achievable during 14 h of bioreactor cultivation. The maximum volumetric phosphate uptake rate (rS,P) reached 280.2 ± 40.8 mg (L h)⁻¹, the highest value reported so far for Acinetobacter spp., while specific rates of up to 41.0 ± 1.1 mg (g h)⁻¹ were achieved. It was further shown that A. tjernbergiae exhibits both polyphosphate accumulation and the overplus phenomenon. Moreover, phosphate uptake was strongly correlated with carbon uptake, while carbon absence resulted in phosphate release.
SN - 0175-7598
SN - 1432-0614
ER -