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Development of a Microalgal (Chlorella)‑Bacterial (Paracoccus) Symbiotic System for Pyridine Biodegradation under Photosynthetic Oxygenation
https://orcid.org/0000-0002-9025-9176
https://orcid.org/0000-0002-0753-6612
Aerobic pyridine biodegradation, which has been proven to be efficient, was often limited by serious air pollution caused by high pyridine volatilization under traditional bubble aeration. In this study, a feasible oxygen supply strategy was developed through the coupling of an algae namely Chlorella sorokiniana FACHB-275 into aerobic biodegradation system inoculated with a pyridine-degrading bacterium namely Paracoccus sp. NJUST47. The results indicated that dissolved oxygen (DO) concentration in this algal–bacterial symbiotic system could reach as high as 7.3 ± 0.4 mg L–1 under light. Pyridine could be completely removed at initial concentration of 125 mg L–1 within 108 h in Chlorella–Paracoccus coupled system, while pyridine removal in Chlorella-only system was negligible and pyridine removal efficiency in Paracoccus-only system was as low as 38.2 ± 1.3%. Mutualistic symbiosis between Chlorella and Paracoccus, including utilization of NH4 + released from pyridine biodegradation by Chlorella and utilization of O2 produced through photo-oxygenation by Paracoccus, resulted in the accelerated growth of both Chlorella and Paracoccus. Furthermore, the favorable long-term operational stability of Chlorella–Paracoccus coupled system was verified in a dynamic membrane photobioreactor (DMPBR). Moreover, based on the identified intermediates, possible pyridine biodegradation mechanism involved in Chlorella–Paracoccus coupled system was proposed.
Aerobic pyridine biodegradation and nitrogen removal could be simultaneously achieved in the microalgal−bacterial symbiotic system without external aeration, avoiding pyridine volatilization.
Development of a Microalgal (Chlorella)‑Bacterial (Paracoccus) Symbiotic System for Pyridine Biodegradation under Photosynthetic Oxygenation
https://orcid.org/0000-0002-9025-9176
https://orcid.org/0000-0002-0753-6612
Aerobic pyridine biodegradation, which has been proven to be efficient, was often limited by serious air pollution caused by high pyridine volatilization under traditional bubble aeration. In this study, a feasible oxygen supply strategy was developed through the coupling of an algae namely Chlorella sorokiniana FACHB-275 into aerobic biodegradation system inoculated with a pyridine-degrading bacterium namely Paracoccus sp. NJUST47. The results indicated that dissolved oxygen (DO) concentration in this algal–bacterial symbiotic system could reach as high as 7.3 ± 0.4 mg L–1 under light. Pyridine could be completely removed at initial concentration of 125 mg L–1 within 108 h in Chlorella–Paracoccus coupled system, while pyridine removal in Chlorella-only system was negligible and pyridine removal efficiency in Paracoccus-only system was as low as 38.2 ± 1.3%. Mutualistic symbiosis between Chlorella and Paracoccus, including utilization of NH4 + released from pyridine biodegradation by Chlorella and utilization of O2 produced through photo-oxygenation by Paracoccus, resulted in the accelerated growth of both Chlorella and Paracoccus. Furthermore, the favorable long-term operational stability of Chlorella–Paracoccus coupled system was verified in a dynamic membrane photobioreactor (DMPBR). Moreover, based on the identified intermediates, possible pyridine biodegradation mechanism involved in Chlorella–Paracoccus coupled system was proposed.
Aerobic pyridine biodegradation and nitrogen removal could be simultaneously achieved in the microalgal−bacterial symbiotic system without external aeration, avoiding pyridine volatilization.
Development of a Microalgal (Chlorella)‑Bacterial (Paracoccus) Symbiotic System for Pyridine Biodegradation under Photosynthetic Oxygenation
https://orcid.org/0000-0002-9025-9176
https://orcid.org/0000-0002-0753-6612
Aerobic pyridine biodegradation, which has been proven to be efficient, was often limited by serious air pollution caused by high pyridine volatilization under traditional bubble aeration. In this study, a feasible oxygen supply strategy was developed through the coupling of an algae namely Chlorella sorokiniana FACHB-275 into aerobic biodegradation system inoculated with a pyridine-degrading bacterium namely Paracoccus sp. NJUST47. The results indicated that dissolved oxygen (DO) concentration in this algal–bacterial symbiotic system could reach as high as 7.3 ± 0.4 mg L–1 under light. Pyridine could be completely removed at initial concentration of 125 mg L–1 within 108 h in Chlorella–Paracoccus coupled system, while pyridine removal in Chlorella-only system was negligible and pyridine removal efficiency in Paracoccus-only system was as low as 38.2 ± 1.3%. Mutualistic symbiosis between Chlorella and Paracoccus, including utilization of NH4 + released from pyridine biodegradation by Chlorella and utilization of O2 produced through photo-oxygenation by Paracoccus, resulted in the accelerated growth of both Chlorella and Paracoccus. Furthermore, the favorable long-term operational stability of Chlorella–Paracoccus coupled system was verified in a dynamic membrane photobioreactor (DMPBR). Moreover, based on the identified intermediates, possible pyridine biodegradation mechanism involved in Chlorella–Paracoccus coupled system was proposed.
Aerobic pyridine biodegradation and nitrogen removal could be simultaneously achieved in the microalgal−bacterial symbiotic system without external aeration, avoiding pyridine volatilization.
Development of a Microalgal (Chlorella)‑Bacterial (Paracoccus) Symbiotic System for Pyridine Biodegradation under Photosynthetic Oxygenation
Zhang, Xiaoyu (Autor:in) / Hou, Xinying (Autor:in) / Jiang, Xinbai (Autor:in) / Chen, Dan (Autor:in) / Ge, Shijian (Autor:in) / Wang, Lianjun (Autor:in) / Shen, Jinyou (Autor:in)
ACS ES&T Water ; 1 ; 356-365
12.02.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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