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Strategy for the formation of microalgae-bacteria aggregates in high-rate algal ponds

dos Santos Neto, Antonio G. ; Barragán-Trinidad, Martín ; Florêncio, Lourdinha ; Buitrón, Germán

Environmental technology, 2023-05, Vol.44 (12), p.1863-1876 [Periódico revisado por pares]

England: Taylor & Francis

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Título:
Strategy for the formation of microalgae-bacteria aggregates in high-rate algal ponds
Autor: dos Santos Neto, Antonio G. ; Barragán-Trinidad, Martín ; Florêncio, Lourdinha ; Buitrón, Germán
Assuntos: Aggregates ; Algae ; Aquatic microorganisms ; Bacteria ; bioflocculation ; Biomass ; Chlorophyll ; Continuous flow ; Cyanobacteria ; Extracellular polymers ; Flocculation ; Gene sequencing ; high-rate algal ponds ; Inoculation ; Marine microorganisms ; Microalgae ; Microalgae-bacteria aggregates ; photogranules ; Ponds ; Ponds - microbiology ; Sludge ; Solid suspensions ; Suspended solids ; Waste Disposal, Fluid ; Wastewater ; Wastewater treatment ; Water treatment
É parte de: Environmental technology, 2023-05, Vol.44 (12), p.1863-1876
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: This work studied the formation of aggregates used for wastewater treatment in high-rate algal ponds (HRAP). For this, the establishment of microalgae-bacteria aggregates in these systems was evaluated, considering strategies for the inoculation and start-up. Two HRAP were operated in parallel, at first in batch mode and then in continuous flow. The wastewater treatment was efficient, with removal rates around 80% for COD and N-ammoniacal. Volatile suspended solids and chlorophyll for the culture grew continuously reached a concentration of 548 ± 11 mg L −1 and 7.8 mg L −1 , respectively. Larger photogranules were observed when the system was placed in a continuous regime. The protein fraction of extracellular polymeric substances was identified as a determinant in photogranules formation. During the continuous regime, more than 50% of the biomass was higher than 0.2 mm, flocculation efficiency of 78 ± 6%, and the volumetric sludge index of 32 ± 5 mL g −1 . The genetic sequencing showed the growth of cyanobacteria in the aggregate and the presence of microalgae from the chlorophytes and diatoms groups in the final biomass.
Editor: England: Taylor & Francis
Idioma: Inglês;Francês

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Strategy for the formation of microalgae-bacteria aggregates in high-rate algal ponds

dos Santos Neto, Antonio G. ; Barragán-Trinidad, Martín ; Florêncio, Lourdinha ; Buitrón, Germán

England: Taylor & Francis

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