Effects of reaction conditions on products and elements distribution via hydrothermal liquefaction of duckweed for wastewater treatment

2020 ◽  
Vol 317 ◽  
pp. 124033
Author(s):  
Guanyi Chen ◽  
Yingying Yu ◽  
Wanqing Li ◽  
Beibei Yan ◽  
Kaige Zhao ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Hydrothermal Liquefaction ◽  
Reaction Conditions

scholarly journals Sustainable production of bio-crude oil via hydrothermal liquefaction of symbiotically grown biomass of microalgae-bacteria coupled with effective wastewater treatment

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Gargi Goswami ◽  
Bidhu Bhusan Makut ◽  
Debasish Das
Keyword(s):  
Wastewater Treatment ◽  
Crude Oil ◽  
Paper Industry ◽  
Oil Quality ◽  
Biomass Concentration ◽  
Diesel Oil ◽  
Hydrothermal Liquefaction ◽  
Total Biomass ◽  
Wastewater Remediation ◽  
Batch Mode

Abstract The study demonstrates a sustainable process for production of bio-crude oil via hydrothermal liquefaction of microbial biomass generated through co-cultivation of microalgae and bacteria coupled with wastewater remediation. Biomass concentration and wastewater treatment efficiency of a tertiary consortium (two microalgae and two bacteria) was evaluated on four different wastewater samples. Total biomass concentration, total nitrogen and COD removal efficiency was found to be 3.17 g L−1, 99.95% and 95.16% respectively when consortium was grown using paper industry wastewater in a photobioreactor under batch mode. Biomass concentration was enhanced to 4.1 g L−1 through intermittent feeding of nitrogen source and phosphate. GC-MS and FTIR analysis of bio-crude oil indicates abundance of the hydrocarbon fraction and in turn, better oil quality. Maximum distillate fraction of 30.62% lies within the boiling point range of 200–300 °C depicting suitability of the bio-crude oil for conversion into diesel oil, jet fuel and fuel for stoves.

Hydrothermal Liquefaction of Wheat Straws for Bio-Oil and Related Analyses

2011 ◽  
Vol 347-353 ◽  
pp. 2419-2422 ◽  
Author(s):  
Hui Wang ◽  
Xiao Juan Liu ◽  
Yan Xing Liu ◽  
Peng Chen ◽  
Jian Sun
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Fourier Transform ◽  
Hydrothermal Liquefaction ◽  
Gas Chromatography Mass Spectrometry ◽  
Reaction Conditions ◽  
Heating Value ◽  
Bio Oil ◽  
The Fourier Transform ◽  
Optimal Reaction

The liquefaction of wheat straws in sub-critical water to obtain bio-oil was investigated in this paper. We observed that the reaction temperature (300-374 °C) and reaction time (1-15 min) played important roles in the yield of bio-oil and found the optimal reaction conditions (340 °C, 5 min). The bio-oil was analyzed by elemental analysis, the Fourier transform infrared spectroscopy (FTIR) and gas chromatography-mass spectrometry (GC-MS). Results indicated that the heating value of bio-oil product was 32-38 MJ/kg, higher than that of the bio-oil obtained from microalgae, and the product was composed of ketones, phenol and its derivatives, aromatics and small amount of aldehydes and ethers.

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