Periodic oxygen supplementation drives efficient metabolism for enhancing valuable bioresource production in photosynthetic bacteria wastewater treatment. (March 2022)

• Record Type: Journal Article
• Authors: Lu, Haifeng; He, Shichao; Zhang, Guangming; Gao, Fengzheng; Zhao, Ruihan
• Is Part Of: Bioresource technology. Volume 347(2022)
• Publication Date: 2022-03
• Subjects: Periodic oxygen supplementation -- Photosynthetic bacteria -- Bioresource production -- Pollutant's removal -- Metabolomics analysis; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2022.126678
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Alternative oxygen (A-O) strategy boosted PSB biomass concentration by 15.7–25.7%. Pigments concentration increased by 15.1–31.1% in A-O strategy. A-O strategy was preferred for CoQ10 production compared with N-O strategy. A-O strategy obtained the highest TCA and β-Alanine metabolism activity. A-O strategy reduced restrain to photophosphorylation compared with C-O strategy. Abstract: Periodic oxygen supplementation (A-O) strategy was proposed to improve pollutant removal and enhance bioresource production of photosynthetic bacteria (PSB). The A-O strategy obtained higher COD (91.4%) and NH4 + -N (78.6%) removal compared with the non-oxygen supplementation (N-O) strategy, which was similar to the continuous oxygen supplementation (C-O) strategy. A-O strategy achieved the highest biomass concentration of 1338.5 mg/L. Bacteriochlorophyll and carotenoids concentration in the A-O strategy were 24.9–31.1% and 15.1–23.7% higher than those in the other two strategies; coenzyme Q10 concentration and content were 52.5% and 21.3% higher than that in the N-O strategy. The metabolomic analysis showed that the A-O strategy enhanced the tricarboxylic acid cycle after fumaric acid formation and β-alanine metabolism, then caused higher biomass accumulation. The A-O strategy reduced the inhibition of photophosphorylation by oxidative-phosphorylation and maintained both characteristics. Hence, A-O might be an economic strategy for enhancing pollutant removal and bioresource production in PSB-based wastewater treatment.