Department of Chemical Engineering, SSN College of Engineering, Kalavakkam - 603110, Tamil Nadu, India.
Department of Chemical Engineering, SSN College of Engineering, Kalavakkam - 603110, Tamil Nadu, India.
Bioresour Technol. 2019 Jul;283:36-44. doi: 10.1016/j.biortech.2019.03.077. Epub 2019 Mar 16.
In this study Scenedesmus abundans was used as a biosorbent material for removing hydrocarbons from simulated petroleum wastewater. Batch experiments resulted in the removal of 92.16% of hydrocarbons from simulated wastewater within 60 min. The spent biosorbent was converted to bio-oil through hydrothermal liquefaction process (HTL) at temperature range from 220 to 320 °C with 1 h holding time. Liquid hydrocarbons (bio-oil) yield was 43.4 wt% at 300 °C with 15 g of spent sorbent loading and possessed HHV of 39.10 MJ/Kg. Additionally the HTL wastewater (aqueous phase) was recycled as reaction medium and studied for its effects on bio-oil yield which increased till second cycle (47.91 wt%). HTL bio-char was employed as adsorbent to remove heavy metals from wastewater. It showed greater removal efficiency of 86.5% to Ni(II) ions. From the results it was concluded that the petroleum residues can be effectively recycled back into liquid hydrocarbons with simple waste management pathway.
在这项研究中，丰富栅藻被用作生物吸附材料，用于去除模拟石油废水中的碳氢化合物。在 60 分钟内，批量实验实现了模拟废水中 92.16%的碳氢化合物去除率。用过的生物吸附剂通过水热液化工艺（HTL）转化为生物油，温度范围为 220 至 320°C，保持时间为 1 小时。在 300°C 时，用 15 克用过的吸附剂负载量，液体碳氢化合物（生物油）的产率为 43.4wt%，HHV 为 39.10 MJ/Kg。此外，将 HTL 废水（水相）作为反应介质回收，并研究其对生物油产率的影响，生物油产率增加到第二个循环（47.91wt%）。HTL 生物炭被用作吸附剂，从废水中去除重金属。它对 Ni(II)离子表现出 86.5%的更高去除效率。从结果可以得出结论，石油残渣可以通过简单的废物管理途径有效地回收回液体碳氢化合物。
