RT info:eu-repo/semantics/article
T1 Phenol and nitrogen removal in microalgal‐bacterial granular sequential batch reactors
A1 Bucci, Paula
A1 García Depraect, Octavio
A1 Montero, Enrique José Marcos
A1 Zaritzky, Noemí
A1 Caravelli, Alejandro
A1 Muñoz Torre, Raúl
K1 Bacterial granules
K1 Chlorella sorokiniana
K1 Nitrogen
K1 Phenol
K1 Photobioreactor
K1 33 Ciencias Tecnológicas
K1 3308 Ingeniería y Tecnología del Medio Ambiente
AB BACKGROUNDThe microalgal-bacterial systems work on the principle of the symbiotic relationship between algae and bacteria. The ability of algal-bacterial photobioreactors for the treatment of wastewater containing ammonia and phenol has been poorly addressed. In this work a self-sustaining synergetic microalgal-bacterial granular sludge process was thus developed to treatment of industrial wastewater based upon the low cost of photosynthetic oxygenation and the simultaneous phenol and nitrogen removal. The performance of a conventional sequential batch reactor (SBR) based on aerobic bacterial communities (SBRB) and a microalgal-bacterial granular SBR (SBRMB) were comparatively assessed. The major challenges associated with microalgal-bacterial systems have been discussed.RESULTSA complete removal of phenol (100 mg L-1) was achieved in both reactors. The reactors SBRB and SBRMB showed similar performance in term of removal of inorganic nitrogen. Nitrogen mass balances estimated nitrogen assimilation, nitrification and denitrification. Higher simultaneous nitrification and denitrification (70% SND) occurred in SBRB as determined by mass balances. The higher nitrogen assimilation (17.9%) by the microalgal-bacterial biomass compensated the lower denitrifying activity in SBRMB (54% SND), resulting in a removal of inorganic nitrogen (61%) similar to that obtained in SBRB (66%). N2O was not detected in the headspace of any system.CONCLUSIONSGranular microalgae-bacterial consortia implemented in SBR constitute an efficient method for industrial wastewater treatment achieving complete removal of ammonia and phenol. The application of SBRMB would be more cost-effective than SBRB mainly due to the significant energy savings in SBRMB resulting in a sustainable system that contributes to the circular bioeconomy.
PB Wiley
SN 0268-2575
YR 2023
FD 2023
LK https://uvadoc.uva.es/handle/10324/60174
UL https://uvadoc.uva.es/handle/10324/60174
LA eng
NO Journal of Chemical Technology & Biotechnology, 2023.
NO Producción Científica
DS UVaDOC
RD 28-nov-2024