RT info:eu-repo/semantics/article
T1 Comparative evaluation of continuous piggery wastewater treatment in open and closed purple phototrophic bacteria-based photobioreactors
A1 Sepúlveda Muñoz, Cristian Andrés
A1 Ángeles Torres, Roxana
A1 Godos Crespo, Ignacio de
A1 Muñoz Torre, Raúl
K1 Bacterias púrpuras sin azufre
K1 Purple non-sulphur bacteria
K1 Bacterias fotosintéticas
K1 Photosynthetic bacteria
K1 Swine manure
K1 23 Química
K1 24 Ciencias de la Vida
AB Purple phototrophic bacteria (PPB) represent an innovative approach for wastewater treatment with a high metabolic plasticity, able to grow under aerobic and anaerobic conditions. This study comparatively assessed the long-term performance (450 days of operation) of an open and closed PPB-based photobioreactor treating of piggery wastewater (PWW). The influence of wastewater dilution, illuminated area to volume ratio, biomass settling and recirculation, and infrared light intensity on wastewater treatment was evaluated at 7 days of hydraulic retention time. An increase in PWW dilution from 4 to 8 folds did not entail higher TOC removal efficiencies (REs) in the open photobioreactor (87% versus 89%), but a significant increase in the closed photobioreactor (from 73% to 80%). The increase in the illuminated area to volume ratio increased TN-REs up to 99% and 49% in the open and closed photobioreactor, respectively, with a concomitant increase in the temperature of both systems. However, temperature control did not mediate a significant enhancement in PWW treatment. Biomass settling and recirculation resulted in higher TN-REs (80%) and TOC-REs (90%) in the closed photobioreactor. The increase in infrared radiation from 100 to 300 W m-2 fostered PPB growth. High water evaporation losses (deteriorating effluent quality) were recorded in the open photobioreactor, where carbon dioxide and ammonia stripping were identified as the main pathways supporting carbon and nitrogen removal.
PB Elsevier
SN 2214-7144
YR 2020
FD 2020
LK http://uvadoc.uva.es/handle/10324/46539
UL http://uvadoc.uva.es/handle/10324/46539
LA eng
NO Journal of Water Process Engineering, 2020, vol. 38, p. 101608
NO Producción Científica
DS UVaDOC
RD 22-nov-2024