Hydrothermal liquefaction of Scenedesmus abundans biomass spent for sorption of petroleum residues from wastewater and studies on recycling of post hydrothermal liquefaction wastewater.

Autor: Sundar Rajan P; Department of Chemical Engineering, SSN College of Engineering, Kalavakkam - 603110, Tamil Nadu, India., Gopinath KP; Department of Chemical Engineering, SSN College of Engineering, Kalavakkam - 603110, Tamil Nadu, India. Electronic address: gopinathkp@ssn.edu.in., Arun J; Department of Chemical Engineering, SSN College of Engineering, Kalavakkam - 603110, Tamil Nadu, India., Grace Pavithra K; Department of Chemical Engineering, SSN College of Engineering, Kalavakkam - 603110, Tamil Nadu, India.
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2019 Jul; Vol. 283, pp. 36-44. Date of Electronic Publication: 2019 Mar 16.
DOI: 10.1016/j.biortech.2019.03.077
Abstrakt: 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.
(Copyright © 2019 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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