Łukasiewicz Research Network-Lodz Institute of Technology, Maria Skłodowska-Curie 19/27, 90-570 Lodz, Poland.
Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, 60-695 Poznan, Poland.
Int J Environ Res Public Health. 2023 Mar 31;20(7):5347. doi: 10.3390/ijerph20075347.
Creosote, a mixture of polycyclic aromatic hydrocarbons (PAHs), was and is a wood impregnate of widespread use. Over the years the accumulation of creosote PAHs in soils and freshwaters has increased, causing a threat to ecosystems. The combined ozonation-biodegradation process is proposed to improve the slow and inefficient biodegradation of creosote hydrocarbons. The impact of different ozonation methods on the biodegradation of model wastewater was evaluated. The biodegradation rate, the changes in chemical oxygen demand, and the total organic carbon concentration were measured in order to provide insight into the process. Moreover, the bacteria consortium activity was monitored during the biodegradation step of the process. The collected data confirmed the research hypothesis, which was that the hybrid method can improve biodegradation. The pre-ozonation followed by inoculation with a bacteria consortium resulted in a significant increase in the biodegradation rate. It allows for the shortening of the time required for the consortium to reach maximum degradation effectiveness and cell activity. Hence, the study gives an important and useful perspective for the decontamination of creosote-polluted ecosystems.
杂酚油是一种多环芳烃（PAHs）的混合物，曾广泛用作木材浸渍剂。多年来，土壤和淡水中杂酚油 PAHs 的积累不断增加，对生态系统构成了威胁。提出了臭氧化-生物降解联合工艺来改善杂酚油烃类缓慢而低效的生物降解。评估了不同臭氧化方法对模型废水生物降解的影响。为了深入了解该过程，测量了生物降解速率、化学需氧量的变化和总有机碳浓度。此外，在该过程的生物降解步骤中监测了细菌共生体的活性。收集的数据证实了研究假设，即混合方法可以提高生物降解。预臭氧化后接种细菌共生体导致生物降解速率显著提高。这使得共生体达到最大降解效率和细胞活性所需的时间缩短。因此，该研究为杂酚油污染生态系统的净化提供了重要而有用的视角。
