LAPSE:2022.0047
Published Article
LAPSE:2022.0047
Role of Microalgae in the Recovery of Nutrients from Pig Manure
Ana Sánchez-Zurano, Martina Ciardi, Tomás Lafarga, José María Fernández-Sevilla, Ruperto Bermejo, Emilio Molina-Grima
October 12, 2022
Animal production inevitably causes the emission of greenhouse gases and the generation of large amounts of slurry, both representing a serious environmental problem. Photosynthetic microorganisms such as microalgae and cyanobacteria have been proposed as alternative strategies to bioremediate agricultural waste while consuming carbon dioxide and producing valuable biomass. The current study assessed the potential of the microalga Scenedesmus sp. to remove nutrients from piggery wastewater (PWW) and the influence of the microalga on the microbial consortia. Maximum N-NH4+ consumption was 55.3 ± 3.7 mg·L−1·day−1 while P-PO43− removal rates were in the range 0.1−1.9 mg·L−1·day−1. N-NH4+ removal was partially caused by the action of nitrifying bacteria, which led to the production of N-NO3−. N-NO3− production values where lower when microalgae were more active. This work demonstrated that the photosynthetic activity of microalgae allows us to increase nutrient removal rates from PWW and to reduce the coliform bacterial load of the effluent, minimising both their environmental impact and health risks. Microalgae assimilated part of the N-NH4+ present in the media to produce biomass and did not to convert it into N-NO3− as in traditional processes.
Keywords
Biomass, biotechnology, photosynthesis, respirometry, Scenedesmus, waste treatment
Suggested Citation
Sánchez-Zurano A, Ciardi M, Lafarga T, Fernández-Sevilla JM, Bermejo R, Molina-Grima E. Role of Microalgae in the Recovery of Nutrients from Pig Manure. (2022). LAPSE:2022.0047
Author Affiliations
Sánchez-Zurano A: Department of Chemical Engineering, University of Almería, 04120 Almería, Spain [ORCID]
Ciardi M: Department of Chemical Engineering, University of Almería, 04120 Almería, Spain
Lafarga T: Department of Chemical Engineering, University of Almería, 04120 Almería, Spain
Fernández-Sevilla JM: Department of Chemical Engineering, University of Almería, 04120 Almería, Spain [ORCID]
Bermejo R: Department of Physical and Analytical Chemistry, University of Jaén, 23700 Linares, Spain
Molina-Grima E: Department of Chemical Engineering, University of Almería, 04120 Almería, Spain
Journal Name
Processes
Volume
9
Issue
2
First Page
203
Year
2021
Publication Date
2021-01-21
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr9020203, Publication Type: Journal Article
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LAPSE:2022.0047
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doi:10.3390/pr9020203
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Oct 12, 2022
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CC BY 4.0
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Oct 12, 2022
 
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Oct 12, 2022
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Thomas A. Adams II
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