RT info:eu-repo/semantics/article
T1 Assessing nitrous oxide emissions from algal-bacterial photobioreactors devoted to biogas upgrading and digestate treatment
A1 Jo, Yura
A1 Hoyos Durán, Edwin Gilbert
A1 Blanco, Saúl
A1 Kim, Sang-Hyoun
A1 Muñoz Torre, Raúl
K1 Algal open pond
K1 Biogas upgrading
K1 HRAP
K1 pH influence
K1 Nitrous oxide
K1 Wastewater treatment
AB Nitrous oxide (N2O) emissions in High Rate Algal Ponds (HRAP) can negatively affect the sustainability of algal-bacterial processes. N2O emissions from a pilot HRAP devoted to biogas upgrading and digestate treatment were herein monitored for 73 days. The influence of the pH (7.5, 8.5, and 9.5), nitrogen sources (100 mg L−1 of N–NO2-, N–NO3-, and N–NH4+) and illumination on N2O emissions from the algal-bacterial biomass of the HRAP was also assessed in batch tests. Significantly higher N2O gas concentrations of 311.8 ± 101.1 ppmv were recorded in the dark compared to the illuminated period (236.9 ± 82.6 ppmv) in the HRAP. The batch tests revealed that the highest N2O emission rates (49.4 mmol g−1 TSS·h−1) occurred at pH 8.5 in the presence of 100 mg N–NO2-/L under dark conditions. This study revealed significant N2O emissions in HRAPs during darkness.
PB Elsevier
SN 0045-6535
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/73104
UL https://uvadoc.uva.es/handle/10324/73104
LA eng
NO Chemosphere, 2024, vol. 361, 142528
NO Producción Científica
DS UVaDOC
RD 03-abr-2025