Role of Microalgae in the Recovery of Nutrients from Pig Manure
| Autor: | Tomás Lafarga, Emilio Molina-Grima, José M. Fernández-Sevilla, Ruperto Bermejo, Ana Sánchez-Zurano, Martina Ciardi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
respirometry Biomass Bioengineering 010501 environmental sciences lcsh:Chemical technology 01 natural sciences 7. Clean energy Scenedesmus lcsh:Chemistry Nutrient 010608 biotechnology TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY Chemical Engineering (miscellaneous) lcsh:TP1-1185 Effluent 0105 earth and related environmental sciences photosynthesis biology biomass Process Chemistry and Technology biology.organism_classification Pulp and paper industry Manure 6. Clean water Waste treatment Wastewater lcsh:QD1-999 13. Climate action Nitrifying bacteria Environmental science waste treatment biotechnology |
| Zdroj: | Processes, Vol 9, Iss 203, p 203 (2021) Processes Volume 9 Issue 2 riUAL. Repositorio Institucional de la Universidad de Almería Universidad de Almería |
| Popis: | 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&minus 1· day&minus 1 while P-PO43&minus removal rates were in the range 0.1&ndash 1.9 mg· 1. N-NH4+ removal was partially caused by the action of nitrifying bacteria, which led to the production of N-NO3&minus N-NO3&minus 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&minus as in traditional processes. |
| Databáze: | OpenAIRE |
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