Publication: Biotransformation of struvite by Aspergillus niger: phosphate release and magnesium biomineralization as glushinskite
Issued Date
2020-01-01
Resource Type
ISSN
14622920
14622912
14622912
Other identifier(s)
2-s2.0-85081296573
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Environmental Microbiology. (2020)
Suggested Citation
Bongkotrat Suyamud, John Ferrier, Laszlo Csetenyi, Duangrat Inthorn, Geoffrey Michael Gadd Biotransformation of struvite by Aspergillus niger: phosphate release and magnesium biomineralization as glushinskite. Environmental Microbiology. (2020). doi:10.1111/1462-2920.14949 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/53538
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Biotransformation of struvite by Aspergillus niger: phosphate release and magnesium biomineralization as glushinskite
Abstract
© 2020 The Authors. Environmental Microbiology published by Society for Applied Microbiology and John Wiley & Sons Ltd. Struvite (magnesium ammonium phosphate-MgNH4PO4·6H2O), which can extensively crystallize in wastewater treatments, is a potential source of N and P as fertilizer, as well as a means of P conservation. However, little is known of microbial interactions with struvite which would result in element release. In this work, the geoactive fungus Aspergillus niger was investigated for struvite transformation on solid and in liquid media. Aspergillus niger was capable of solubilizing natural (fragments and powder) and synthetic struvite when incorporated into solid medium, with accompanying acidification of the media, and extensive precipitation of magnesium oxalate dihydrate (glushinskite, Mg(C2O4).2H2O) occurring under growing colonies. In liquid media, A. niger was able to solubilize natural and synthetic struvite releasing mobile phosphate (PO43−) and magnesium (Mg2+), the latter reacting with excreted oxalate resulting in precipitation of magnesium oxalate dihydrate which also accumulated within the mycelial pellets. Struvite was also found to influence the morphology of A. niger mycelial pellets. These findings contribute further understanding of struvite solubilization, element release and secondary oxalate formation, relevant to the biogeochemical cycling of phosphate minerals, and further directions utilizing these mechanisms in environmental biotechnologies such as element biorecovery and biofertilizer applications.