This study investigates the purification performance of bio-trickling filters (BTFs) using different media to treat ethanol, acetaldehyde, and ethyl acetate in kitchen waste malodorous gases. The media compared included a custom composite medium, pine bark, hollow polyhedral spheres, and ceramic particles. Over 25 days, the composite medium outperformed the traditional media, achieving removal rates of 90.13 % for ethanol, 63.89 % for acetaldehyde, and 82.56 % for ethyl acetate during the biofilm initiation phase, with the others below 60 %. Even under low empty bed residence time and high inlet concentrations, the maximum elimination capacity for ethanol, acetaldehyde, and ethyl acetate was 8.34–14.70 g/m3·h, 9.55–15.06 g/m3·h, and 6.18–10.45 g/m3·h. Kinetic analysis showed the Michaelis-Menten model fit well, indicating enhanced removal potential. High-throughput of 16S rDNA sequencing identified dominant microorganisms like Enterobacteriaceae (13.89 %), Stenotrophomonas (29.23 %), and Acinetobacter (4.09 %) in the composite medium, which thrived even at high pollutant concentrations. Principal component analysis (PCA) demonstrated differences in the microbial composition of the custom composite medium compared to traditional media under varying inlet concentrations and loads. This study provides technical support for the treatment of complex malodorous gas mixtures.

中文翻译：

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使用各种填料的生物滴流过滤反应器高效降解乙醇、乙醛和乙酸乙酯


本研究调查了使用不同介质处理厨余垃圾恶臭气体中乙醇、乙醛和乙酸乙酯的生物滴滤器 （BTF） 的净化性能。比较的介质包括定制的复合介质、松树皮、空心多面体球体和陶瓷颗粒。在 25 天内，复合培养基的性能优于传统培养基，在生物膜起始阶段实现了 90.13% 的乙醇去除率、63.89% 的乙醛去除率和 82.56% 的乙酸乙酯去除率，其他培养基的去除率低于 60%。即使在低空床停留时间和高入口浓度下，乙醇、乙醛和乙酸乙酯的最大消除能力也为 8.34–14.70 g/m3·h、9.55–15.06 g/m3·h 和 6.18–10.45 g/m3·h。动力学分析显示 Michaelis-Menten 模型拟合良好，表明去除潜力增强。16S rDNA 测序的高通量鉴定了复合培养基中肠杆菌科 （13.89 %）、窄食单胞菌 （29.23 %） 和不动杆菌 （4.09 %）等优势微生物，即使在高污染物浓度下也能茁壮成长。主成分分析 （PCA） 表明，在不同入口浓度和负载下，定制复合培养基的微生物组成与传统培养基存在差异。本研究为复杂恶臭气体混合物的处理提供了技术支持。