RT info:eu-repo/semantics/article
T1 Assessment of the influence of the hydraulic retention time on the tertiary and quaternary treatment of a high rate algal pond
A1 Regueira Marcos, Lois
A1 López Serna, Rebeca
A1 García Depraect, Octavio
A1 Rodero Raya, María del Rosario
A1 Alcoceba, Ana
A1 Muñoz Torre, Raúl
K1 CECs
K1 Escherichia coli
K1 High-rate algal pond
K1 HRT
K1 Microalgae
K1 Nutrient removal
AB The influence of the hydraulic retention time (HRT) on the performance of a high-rate algal pond (HRAP) withbiomass settling and recycling for tertiary and quaternary treatment of domestic wastewater was herein eval-uated. A decrease in the HRT from 4 days (P1) to 2 days (P2) did not entail substantial differences in the removalefficiencies of nitrogen (54.3 ± 11.6 and 54.0 ± 7.3 %), phosphorous (42.6 ± 21.6 and 39.3 ± 35.8 %), organiccarbon (33.5 ± 12.2 and 38.4 ± 26.4 %) and inorganic carbon (55.6 ± 10.8 and 50.5 ± 26.8 %). Escherichia coli(0.7 ± 1.4 and 3.8 ± 5.2 CFU-mL 1, respectively) and suspended solid (10 mg TSS-L 1 average) concentrationsin the effluent remained below European discharge limits. However, the effluent total nitrogen (TN) concen-tration exceeded those limits, despite the high NH4+ removal capacity (> 95 %) of the HRAP. Regarding CECs, 9compounds were removed below their quantification limit in P1, and 5 compounds in P2. The HRT exhibited alow impact on the total removal of CECs, with removal efficiencies of 57.6 ± 4.0 % and 63.7 ± 3.1 % during P1and P2, respectively. The CEC concentrations retained in biomass increased at decreasing the HRT, with 723 and1026 μg L 1 at P1 and P2, respectively. Most of these compounds belonged to the group of fluoroquinolones oranti-inflammatory drugs. Overall, HRAPs represent a cost-effective technology platform for tertiary and qua-ternary treatment of domestic wastewaters
PB Elsevier
SN 2211-9264
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/78522
UL https://uvadoc.uva.es/handle/10324/78522
LA eng
NO Algal Research, 2025, vol. 91, p. 104239
NO Producción Científica
DS UVaDOC
RD 10-oct-2025