摘要

    在这项研究中，研究了超声（US），臭氧和US联合臭氧（US / Ozone）预处理对乳制品废水中肠道指示菌和抗生素抗性基因（ARGs）的命运以及厌氧消化（AD）的影响。 。预处理条件包括：美国功率200 W，臭氧浓度4.2 mg O3 / L，预处理时间0–30分钟。结果表明，US /臭氧预处理可有效灭活肠溶指示菌。 US /臭氧预处理30分钟后，大肠菌群和肠球菌总数分别减少了99％和92％。预处理不能降低ARGs的绝对浓度，但可以降低ARGs的相对丰度。在随后的反渗透过程中，使用20分钟的臭氧或20分钟的US / Oz预处理，甲烷的产量增加了10％以上。预处理-AD一起明显抑制了相对丰度的ARGs富集。这项研究提供了一种预处理方法，可以提高甲烷的产量并防止ARGs的富集。

    In this study, the effect of ultrasound (US), ozone and US combined with ozone (US/ozone) pretreatments on the fate of enteric indicator bacteria and antibiotic resistance genes (ARGs), and anaerobic digestion (AD) of dairy wastewater was investigated. The pretreatment conditions included US power 200 W, ozone concentration 4.2 mg O3/L, and pretreatment time 0–30 min. The results showed that US/ozone pretreatment was effective in the inactivation of enteric indicator bacteria. Total coliforms and enterococci were reduced by 99% and 92% after 30 min US/ozone pretreatment. Pretreatments could not decrease ARGs in absolute concentration, but could decrease ARGs in relative abundance. In the subsequent AD process, methane production increased more than 10% with 20 min ozone or 20 min US/ozone pretreatments. Pretreatment-AD together obviously inhibited the enrichment of ARGs in relative abundance. This study provided a pretreatment way to enhance methane production and to prevent the enrichment of ARGs.

    https://www.sciencedirect.com/science/article/abs/pii/S0960852420316308