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Research Article
Yan Li
Norwegian Institute for Water Research: Norsk Institutt for Vannforskning
Corresponding Author
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This study demonstrated that the application of filamentous co-culture could be a promising supplementary approach to further purify municipal tertiary wastewater in Nordic country. Initial screening of 25 algae strains across multiple genera revealed that Spirogyra sp. and Klebsormidium sp. were suitable for use as a coculture for phycoremediation of the tertiary effluent from a wastewater treatment plant, and this result was validated in three consecutive outdoor pilot tests at 10–15 oC. In the first two batches of pilot tests, the total prosperous and ammonium were depleted close to zero in 24 hours, while the pH in the wastewater increased from 7 to 9. In the 3rd batch, CO2 was thereby added for pH control. Macronutrients (N and P) were successfully removed from the treated wastewater. The total algae biomass increased 2 to 3 times over 7 days with average algae productivity of 1.68 g m2 d− 1. Meanwhile, the produced algae biomass accumulated notable mineral elements (Ca, Mg, K, Fe and Al) and some heavy metals at levels of g kg− 1 and mg kg− 1, respectively. In light of circular economy concept, the produced biomass could be used for different valorizations based on the analytical analysis. This study provides a new insight of phycoremediation for further purification of municipal treated wastewater, by effectively using filamentous algae coculture. Given a great potential for further optimization and improvement, this proof of concept will benefit to the green transition of wastewater treatment plants in Nordic country.
Keywords
filamentous algae, treated wastewater, phycoremediation, co-culture, Klebsormidium, Spirogyra
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CURRENT STATUS: Under Review
Version 1
Posted 19 Mar, 2021
No community comments so far
Reviewer #3 agreed
On 24 Mar, 2021
Reviewer #2 agreed
On 23 Mar, 2021
Reviewer #1 agreed
On 20 Mar, 2021
Review #? received
Received 20 Mar, 2021
Reviewers invited
Invitations sent on 16 Mar, 2021
Editor assigned
On 11 Mar, 2021
Submission checks complete
On 11 Mar, 2021
Editor invited
On 11 Mar, 2021
First submitted
On 07 Mar, 2021
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Subject Areas
Marine and Freshwater Ecology
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This preprint is under consideration at Bioresources and Bioprocessing. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research Article
Yan Li
Norwegian Institute for Water Research: Norsk Institutt for Vannforskning
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Review
Version 1
Posted 19 Mar, 2021
No community comments so far
Reviewer #3 agreed
On 24 Mar, 2021
Reviewer #2 agreed
On 23 Mar, 2021
Reviewer #1 agreed
On 20 Mar, 2021
Review #? received
Received 20 Mar, 2021
Reviewers invited
Invitations sent on 16 Mar, 2021
Editor assigned
On 11 Mar, 2021
Submission checks complete
On 11 Mar, 2021
Editor invited
On 11 Mar, 2021
First submitted
On 07 Mar, 2021
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Marine and Freshwater Ecology
License:
This work is licensed under a CC BY 4.0 License. Read Full License
This study demonstrated that the application of filamentous co-culture could be a promising supplementary approach to further purify municipal tertiary wastewater in Nordic country. Initial screening of 25 algae strains across multiple genera revealed that Spirogyra sp. and Klebsormidium sp. were suitable for use as a coculture for phycoremediation of the tertiary effluent from a wastewater treatment plant, and this result was validated in three consecutive outdoor pilot tests at 10–15 oC. In the first two batches of pilot tests, the total prosperous and ammonium were depleted close to zero in 24 hours, while the pH in the wastewater increased from 7 to 9. In the 3rd batch, CO2 was thereby added for pH control. Macronutrients (N and P) were successfully removed from the treated wastewater. The total algae biomass increased 2 to 3 times over 7 days with average algae productivity of 1.68 g m2 d− 1. Meanwhile, the produced algae biomass accumulated notable mineral elements (Ca, Mg, K, Fe and Al) and some heavy metals at levels of g kg− 1 and mg kg− 1, respectively. In light of circular economy concept, the produced biomass could be used for different valorizations based on the analytical analysis. This study provides a new insight of phycoremediation for further purification of municipal treated wastewater, by effectively using filamentous algae coculture. Given a great potential for further optimization and improvement, this proof of concept will benefit to the green transition of wastewater treatment plants in Nordic country.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
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