Journal
BIORESOURCE TECHNOLOGY
Volume 283, Issue -, Pages 36-44Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.03.077
Keywords
Petroleum wastewater; Scenedesmus abundans; Hydrothermal liquefaction; Hydrocarbons; Bio-char
Funding
- SSN trust
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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 degrees C with 1 h holding time. Liquid hydrocarbons (bio-oil) yield was 43.4 wt% at 300 degrees 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.
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