Scholarlink

<p>In this study, the coincident biodegradation of toluene and methanol, as model hydrophobic and hydrophilic volatile organic compounds (VOCs), was examined and compared in the absence and presence of silicone oil as the non-aqueous phase (NAP) in the biotrickling filter (BTF). The inlet concentrations of two compounds in fixed gas residence time of 1&#xa0;min ranged from 0 to 3.8&#xa0;g&#xa0;m<sup>−3</sup> and from 0.3 to 0.6&#xa0;g&#xa0;m<sup>−3</sup> for methanol and toluene, respectively. The results displayed the remarkable decline of toluene removal efficiency (RE<sub>T</sub>) from 80 to 25% as a result of high inlet concentration of methanol (~ 3&#xa0;g&#xa0;m<sup>−3</sup>) in the one-liquid phase BTF (OLP-BTF), while the oil addition had a remarkable effect on improving of RE<sub>T</sub> to 92% in the two liquid phase BTF (TLP-BTF) at the same inlet concentration of methanol. The microbial composition analysis revealed that near the inlet of the TLP-BTF, the higher solubility of toluene and consequently higher bioavailability, decreased the diversity of the microbial consortium compared to the OLP-BTF. The higher abundance of toluene degraders like <i>Burkholderia</i>, <i>Castellaniella</i> and <i>Gordonia</i> genera in the TLP-BTF, indicated higher biodegradation of toluene as a result of higher affinity to the aqueous phase. In contrast, the lower abundance of <i>Hyphomicrobium</i> genus as methanol-degrading bacteria in the TLP-BTF showed that the toluene-degrading bacteria had better competitive growth in such conditions.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Comparative Assessment of Co-Treatment of Toluene and Methanol Vapors in One- and Two-Liquid Phase Biotrickling Filters with Biofilm Characterization

  • 期刊论文

  • 发表日期：

    2025年8月7日

查看全文
  • Mohammad Kalantar,
  • Seyed Morteza Zamir,
  • Milad Ferdowsi

摘要

In this study, the coincident biodegradation of toluene and methanol, as model hydrophobic and hydrophilic volatile organic compounds (VOCs), was examined and compared in the absence and presence of silicone oil as the non-aqueous phase (NAP) in the biotrickling filter (BTF). The inlet concentrations of two compounds in fixed gas residence time of 1 min ranged from 0 to 3.8 g m−3 and from 0.3 to 0.6 g m−3 for methanol and toluene, respectively. The results displayed the remarkable decline of toluene removal efficiency (RET) from 80 to 25% as a result of high inlet concentration of methanol (~ 3 g m−3) in the one-liquid phase BTF (OLP-BTF), while the oil addition had a remarkable effect on improving of RET to 92% in the two liquid phase BTF (TLP-BTF) at the same inlet concentration of methanol. The microbial composition analysis revealed that near the inlet of the TLP-BTF, the higher solubility of toluene and consequently higher bioavailability, decreased the diversity of the microbial consortium compared to the OLP-BTF. The higher abundance of toluene degraders like Burkholderia, Castellaniella and Gordonia genera in the TLP-BTF, indicated higher biodegradation of toluene as a result of higher affinity to the aqueous phase. In contrast, the lower abundance of Hyphomicrobium genus as methanol-degrading bacteria in the TLP-BTF showed that the toluene-degrading bacteria had better competitive growth in such conditions.