1
|
Villard D, Nesbø Goa IA, Leena Angell I, Eikaas S, Saltnes T, Johansen W, Rudi K. Spatiotemporal succession of phosphorous accumulating biofilms during the first year of establishment. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2023; 88:381-391. [PMID: 37522440 PMCID: wst_2023_214 DOI: 10.2166/wst.2023.214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/01/2023]
Abstract
Many wastewater treatment plants are dependent on the utilization of microorganisms in biofilms. Our knowledge about the establishment of these biofilms is limited, particular with respect to biofilms involved in enhanced biological phosphorus removal (EBPR). These biofilms rely on polyphosphate-accumulating organisms (PAOs), requiring alternating oxic and anaerobic conditions for phosphorous uptake. This challenge has been solved using the Hias process, which combines moving-bed biofilm-reactor (MBBR) technology with physical transfer of biofilm-carriers from oxic to anaerobic zones. We combined biofilm fractionation with temporal analyses to unveil the establishment in the Hias process. A stable phosphorous removal efficiency of >95% was reached within 16 weeks of operation. Phosphorus removal, however, was not correlated with the establishment of known PAOs. The biofilms seemed associated with an outer microbiota layer with rapid turnover and an inner layer with a slow expansion. The inner layer showed an overrepresentation of known PAOs. In conclusion, our spatiotemporal analyses of phosphorous accumulating biofilm establishment lead to a new model for biofilm growth, while the mechanisms for phosphorous removal remain largely unresolved.
Collapse
Affiliation(s)
- Didrik Villard
- Department of Biotechnology, Inland Norway University of Applied Sciences, Hamar, Norway E-mail:
| | - Inger Andrea Nesbø Goa
- Faculty of Chemistry, Biotechnology and Food Science, University of Life Sciences, Ås, Norway
| | - Inga Leena Angell
- Faculty of Chemistry, Biotechnology and Food Science, University of Life Sciences, Ås, Norway
| | | | - Torgeir Saltnes
- Hias, Ottestad, Hamar, Norway; Hias How2O, Ottestad, Hamar, Norway
| | - Wenche Johansen
- Department of Biotechnology, Inland Norway University of Applied Sciences, Hamar, Norway
| | - Knut Rudi
- Department of Biotechnology, Inland Norway University of Applied Sciences, Hamar, Norway; Faculty of Chemistry, Biotechnology and Food Science, University of Life Sciences, Ås, Norway
| |
Collapse
|
2
|
Pettersen R, Ormaasen I, Angell IL, Keeley NB, Lindseth A, Snipen L, Rudi K. Bimodal distribution of seafloor microbiota diversity and function are associated with marine aquaculture. Mar Genomics 2022; 66:100991. [PMID: 36116403 DOI: 10.1016/j.margen.2022.100991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Revised: 09/06/2022] [Accepted: 09/07/2022] [Indexed: 12/01/2022]
Abstract
The aim of the current work was to investigate the impact of marine aquaculture on seafloor biogeochemistry and diversity from pristine environments in the northern part of Norway. Our analytical approach included analyses of 182 samples from 16 aquaculture sites using 16S and 18S rRNA, shotgun analyses, visual examination of macro-organisms, in addition to chemical measurements. We observed a clear bimodal distribution of the prokaryote composition and richness, determined by analyses of 16S rRNA gene operational taxonomic units (OTUs). The high OTU richness cluster was associated with non-perturbed environments and farness from the aquaculture sites, while the low OTU richness cluster was associated with perturbed environments and proximity to the aquaculture sites. Similar patterns were also observed for eukaryotes using 18S rRNA gene analyses and visual examination, but without a bimodal distribution of OTU richness. Shotgun sequencing showed the archaeum Nitrosopumilus as dominant for the high OTU richness cluster, and the epsilon protobacterium Sulfurovum as dominant for the low OTU richness cluster. Metabolic reconstruction of Nitrosopumilus indicates nitrification as the main metabolic pathway. Sulfurovum, on the other hand, was associated with sulfur oxidation and denitrification. Changes in nitrogen and sulfur metabolism is proposed as a potential explanation for the difference between the high and low OTU richness clusters. In conclusion, these findings suggest that pollution from elevated loads of organic waste drives the microbiota towards a complete alteration of respiratory routes and species composition, in addition to a collapse in prokaryote OTU richness.
Collapse
Affiliation(s)
| | - I Ormaasen
- Norwegian University of Life Sciences, Ås, Norway
| | - I L Angell
- Norwegian University of Life Sciences, Ås, Norway
| | - N B Keeley
- Institute of Marine Research, Tromsø, Norway
| | | | - L Snipen
- Norwegian University of Life Sciences, Ås, Norway
| | - K Rudi
- Norwegian University of Life Sciences, Ås, Norway.
| |
Collapse
|
3
|
Cecchetto M, Di Cesare A, Eckert E, Fassio G, Fontaneto D, Moro I, Oliverio M, Sciuto K, Tassistro G, Vezzulli L, Schiaparelli S. Antarctic coastal nanoplankton dynamics revealed by metabarcoding of desalination plant filters: Detection of short-term events and implications for routine monitoring. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 757:143809. [PMID: 33257075 DOI: 10.1016/j.scitotenv.2020.143809] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 10/14/2020] [Accepted: 10/23/2020] [Indexed: 06/12/2023]
Abstract
One of the main requirements of any sound biological monitoring is the availability of long term and, possibly, temporal data with a high resolution. This is often difficult to be achieved, especially in Antarctica, due to a variety of logistic constraints, which make continuous sampling and monitoring activities generally unfeasible. Here we focus on the 5 μm filters used in the desalination plant of the Italian research base "Mario Zucchelli" in the Terra Nova Bay area (Ross Sea, Antarctica) to evaluate intra-annual coastal nanoplankton dynamics. These filters, together with others of larger mesh sizes, are used to decrease the amount of organisms and debris in the input seawater before the desalination processes take place, hence automatically collect the plankton present in the water column around the desalination system intake. We have used a DNA metabarcoding approach to characterize the communities retained by filters' sets collected in January 2012 and 2013. Intra-annual dynamics were disclosed with an unprecedented detail, that would not have been possible by using standard sampling approaches, and highlighted the importance of extreme, stochastic events such as katabatic wind pulses, which triggered dramatic, short-term shifts in coastal nanoplankton composition. This method, by combining a cost-effective sampling and molecular techniques, may represent a viable solution for long-term monitoring programs focusing on Antarctic coastal communities.
Collapse
Affiliation(s)
- Matteo Cecchetto
- Italian National Antarctic Museum (MNA, Section of Genoa), University of Genoa, Genoa, Italy; Department of Earth, Environmental and Life Science (DISTAV), University of Genoa, Genoa, Italy.
| | - Andrea Di Cesare
- National Research Council of Italy, Water Research Institute (CNR-IRSA), Verbania Pallanza, Italy
| | - Ester Eckert
- National Research Council of Italy, Water Research Institute (CNR-IRSA), Verbania Pallanza, Italy
| | - Giulia Fassio
- Department of Biology and Biotechnologies "Charles Darwin", Sapienza University of Rome, Rome, Italy
| | - Diego Fontaneto
- National Research Council of Italy, Water Research Institute (CNR-IRSA), Verbania Pallanza, Italy
| | - Isabella Moro
- Department of Biology, University of Padova, Padua, Italy
| | - Marco Oliverio
- Department of Biology and Biotechnologies "Charles Darwin", Sapienza University of Rome, Rome, Italy
| | - Katia Sciuto
- Department of Biology, University of Padova, Padua, Italy
| | - Giovanni Tassistro
- Department of Earth, Environmental and Life Science (DISTAV), University of Genoa, Genoa, Italy
| | - Luigi Vezzulli
- Department of Earth, Environmental and Life Science (DISTAV), University of Genoa, Genoa, Italy
| | - Stefano Schiaparelli
- Italian National Antarctic Museum (MNA, Section of Genoa), University of Genoa, Genoa, Italy; Department of Earth, Environmental and Life Science (DISTAV), University of Genoa, Genoa, Italy
| |
Collapse
|