2026-05-05T22:03:11Zhttps://uvadoc.uva.es/oai/request
oai:uvadoc.uva.es:10324/465392025-02-21T12:14:18Zcom_10324_35294com_10324_952com_10324_894col_10324_35295
UVaDOC author Sepúlveda Muñoz, Cristian Andrés author Ángeles Torres, Roxana author Godos Crespo, Ignacio de author Muñoz Torre, Raúl 2021-05-10T10:08:07Z 2021-05-10T10:08:07Z 2020 Journal of Water Process Engineering, 2020, vol. 38, p. 101608 2214-7144 http://uvadoc.uva.es/handle/10324/46539 10.1016/j.jwpe.2020.101608 101608 Journal of Water Process Engineering 38 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. eng Attribution-NonCommercial-NoDerivatives 4.0 Internacional Comparative evaluation of continuous piggery wastewater treatment in open and closed purple phototrophic bacteria-based photobioreactors info:eu-repo/semantics/article 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URL https://uvadoc.uva.es/bitstream/10324/46539/1/Comparative-evaluation-continuous-piggery-wastewater.pdf File MD5 25dcbdd92d0b6e4b9877dfa5b6530383 671032 application/pdf Comparative-evaluation-continuous-piggery-wastewater.pdf