School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou, PR China.
School of Ecology, Sun Yat-sen University, Guangzhou, PR China.
Bioresour Technol. 2024 Feb;394:130239. doi: 10.1016/j.biortech.2023.130239. Epub 2023 Dec 23.
This study investigated the potential of micro-nano bubble (MNB) ozonation pretreatment to eliminate oxytetracycline (OTC) from wastewater and improve subsequent anaerobic digestion (AD) performance. The findings revealed that MNB ozonation achieved efficient OTC oxidation (>99 % in 60 min), and significantly enhanced methane production by 51 % compared to conventional ozonation (under 30 min of pretreatment). Additionally, MNB ozonation resulted in a decrease in the soluble chemical oxygen demand and reduced volatile fatty acid accumulation compared to conventional ozonation. Furthermore, the study sheds light on the profound impact of OTC and its oxidation by-products on the sludge microbiome. Exposure to OTC and its oxidation by-products resulted in alterations in extracellular polymeric substances composition and led to significant shifts in microbial community structure. This study highlights the promise of MNB ozonation as an effective approach for pharmaceutical pollutant removal and the optimization of AD performance in wastewater treatment, with implications for improved environmental sustainability.
本研究探讨了微纳米气泡（MNB）臭氧预处理消除废水中土霉素（OTC）并提高后续厌氧消化（AD）性能的潜力。研究结果表明，MNB 臭氧氧化可实现高效的 OTC 氧化（60 分钟内>99%），与传统臭氧氧化（预处理时间<30 分钟）相比，甲烷产量显著提高了 51%。此外，与传统臭氧氧化相比，MNB 臭氧氧化可降低可溶性化学需氧量并减少挥发性脂肪酸的积累。此外，该研究揭示了 OTC 及其氧化副产物对污泥微生物组的深远影响。暴露于 OTC 及其氧化副产物会导致细胞外聚合物物质组成发生变化，并导致微生物群落结构发生显著变化。本研究强调了 MNB 臭氧氧化作为一种有效去除药物污染物和优化废水处理中 AD 性能的方法的潜力，对提高环境可持续性具有重要意义。
