RT info:eu-repo/semantics/article
T1 Scale-down of high-rate algae ponds systems for urban wastewater reuse
A1 Gonzalo Ibrahim, Félix Gaspar
A1 Alonso Gómez, Víctor
A1 Muñoz Torre, Raúl
A1 Godos Crespo, Ignacio de
K1 Aguas residuales Depuración
K1 Disinfection
K1 Down-scale
K1 Microalgae-based treatment
K1 Desinfección
K1 Reducir la escala
K1 Tratamiento a base de microalgas
K1 3308.10 Tecnología de Aguas Residuales
AB In spite of the important environmental and operative advantages of microalgae-based wastewater treatment systems, they present a low level of implementation. Experimental validations in lab scale should reproduce conditions as close as possible to outdoor conditions. In this sense, two experimental reactors were operated under irradiation and temperature levels corresponding to summer and winter conditions found in temperate climates. The configuration of these reactors resulted in mass transfer rates (gas exchange) in the range of the values reported for industrial scale outdoor facilities. While superficial biomass productivity was in the range of previously reported experiences (between 5.7 and 22 g m−2 d−1, in winter and summer conditions, respectively), pollution removal efficiencies reached the values required for wastewater discharge: >78 % of CODt, >96 % of NH4+ and >79 % of PO43−. Unlike previous experiences, hydraulic retention time (HRT) was maintained constant (3 days) in both seasonal conditions, reaching sufficient pollution removal and biomass productivity. The pathogen concentration reached in the final effluent was compatible with the reclaimed water standards in spite of the absence of ultraviolet light in the illumination system, evidencing the relevance of the environmental conditions created by microalgae metabolism in the disinfection process. The characterization of the microbial population revealed the presence of bacteria responsible of organic matter removal, ammonia oxidation and microalgae commonly found in wastewater systems.
PB Elsevier
SN 2214-7144
YR 2023
FD 2023
LK https://uvadoc.uva.es/handle/10324/62604
UL https://uvadoc.uva.es/handle/10324/62604
LA eng
NO Journal of Water Process Engineering, 2023, vol. 56, 104342
NO Producción Científica
DS UVaDOC
RD 13-may-2024