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<p>Antibiotic pollution in wastewater poses a significant threat to ecosystems and human health, necessitating effective and sustainable treatment methods. This study investigates the use of phytohormones to enhance the performance of microalgae-bacteria-fungi systems for antibiotic removal. Four phytohormones: gibberellic acid (GA), strigolactone analog GR24 (GR24), GR24 + GA, and agricultural plant phytohormones (GIB) and four symbiotic configurations (Group 1: <i>Chlorella ellipsoidea</i>; Group 2: <i>C. ellipsoidea</i> + activated sludge + <i>Clonostachys rosea</i>; Group 3: <i>C. ellipsoidea</i> + <i>Bacillus licheniformis</i> + <i>C. rosea</i>; Group 4: <i>C. ellipsoidea</i> + endophytic bacterium S395-2 + <i>C. rosea</i>) were tested to determine optimal conditions. The combination of Group 4 with GR24 + GA demonstrated superior growth characteristics, enhanced photosynthetic efficiency, and outstanding antibiotic removal rates for tetracycline, oxytetracycline, ciprofloxacin, norfloxacin, sulfamethazine, and sulfamethoxazole, achieving rates of 99.24 ± 0.39%, 97.86 ± 2.11%, 77.59 ± 7.32%, 73.62 ± 6.78%, 82.76 ± 7.34%, and 79.08 ± 7.47%, respectively. This study provides a promising new approach to wastewater treatment, advancing algal-based technologies for efficient antibiotic removal and environmental protection.</p>

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Enhancing antibiotics removal and photosynthetic performance in microalgae-bacteria-fungi systems via phytohormone application

  • 期刊论文

  • 发表日期：

    2025年8月28日

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  • Tongtong Wang,
  • Haiyang Xu,
  • Junfeng Li,
  • Shiqing Sun

摘要

Antibiotic pollution in wastewater poses a significant threat to ecosystems and human health, necessitating effective and sustainable treatment methods. This study investigates the use of phytohormones to enhance the performance of microalgae-bacteria-fungi systems for antibiotic removal. Four phytohormones: gibberellic acid (GA), strigolactone analog GR24 (GR24), GR24 + GA, and agricultural plant phytohormones (GIB) and four symbiotic configurations (Group 1: Chlorella ellipsoidea; Group 2: C. ellipsoidea + activated sludge + Clonostachys rosea; Group 3: C. ellipsoidea + Bacillus licheniformis + C. rosea; Group 4: C. ellipsoidea + endophytic bacterium S395-2 + C. rosea) were tested to determine optimal conditions. The combination of Group 4 with GR24 + GA demonstrated superior growth characteristics, enhanced photosynthetic efficiency, and outstanding antibiotic removal rates for tetracycline, oxytetracycline, ciprofloxacin, norfloxacin, sulfamethazine, and sulfamethoxazole, achieving rates of 99.24 ± 0.39%, 97.86 ± 2.11%, 77.59 ± 7.32%, 73.62 ± 6.78%, 82.76 ± 7.34%, and 79.08 ± 7.47%, respectively. This study provides a promising new approach to wastewater treatment, advancing algal-based technologies for efficient antibiotic removal and environmental protection.