Abstract：
:Wastewater treatment by duckweed is a naturally sustainable technology. However, its development is limited due to the lack of a follow-up treatment of duckweed. The duckweed was proposed for the treatment of rural domestic wastewater and agricultural wastewater, and it was further processed to produce bio-oil via hydrothermal liquefaction at various temperatures (250 °C-370 °C) and residence times (15-60 min). The highest bio-oil yield of 35.6 wt% was obtained at 370 °C, 45 min. The higher heating value of bio-oil was 40.85 MJ/kg, and the H/C ratio (1.72-1.98) was similar to that of petroleum (1.84). The gas chromatography-mass spectrometry analysis results revealed that the bio-oil mainly consisted of N-heterocycles, cyclic ketones, esters, amides, long-chain hydrocarbons, phenols, and aromatic intermediates. Valuable compounds (3-pyridinol, 2-pyrrolidinone, and its analogues) of high concentration were identified in the water-soluble organic matter. Compared with other materials, this study produced higher-quality bio-oil and water-soluble organic matter.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Chen G,Yu Y,Li W,Yan B,Zhao K,Dong X,Cheng Z,Lin F,Li L,Zhao H,Fang Ydoi
10.1016/j.biortech.2020.124033subject
Has Abstractpub_date
2020-12-01 00:00:00pages
124033eissn
0960-8524issn
1873-2976pii
S0960-8524(20)31305-5journal_volume
317pub_type
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