Hydrothermal liquefaction of mixed-culture algal biomass from wastewater treatment system into bio-crude oil
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- 作者：Wan-Ting Chen ; Yuanhui Zhang ; Jixiang Zhang ; Guo Yu ; Lance C. Schideman ; Peng Zhang ; Mitchell Minarick
- 关键词：Ash ; ash fraction in the dry mass of AW (no units) ; AWVM ; mass of volatile matter of mixed-culture algal biomass from wastewater treatment system (g) ; F ; mass of feedstock (g) ; G ; mass of gas products (g) ; MWI ; mass of moisture in the water-insoluble products (g) ; R ; raw oil (g) ; SR ; mass of toluene-insoluble fraction in the water-insoluble products (g) ; VM ; volatile matter (g) ; WI ; mass of water-insoluble products (g)
- 刊名：Bioresource Technology
- 出版年：January, 2014
- 年：2014
- 卷：152
- 期：Complete
- 页码：130-139
- 全文大小：1580 K
文摘
In this study, a mixed-culture algal biomass harvested from a functioning wastewater treatment system (AW) was hydrothermally converted into bio-crude oils. The highest bio-crude oil yield (49% of volatile matter) and the highest energy recovery were obtained at 300 掳C with 1 h retention time. The highest heating value of the bio-crude oil was 33.3 MJ/kg, produced at 320 掳C and 1 h retention time. Thermogravimetric analysis showed approximately 60% of the bio-crude oils were distilled in the range of 200-550 掳C; and the solid residue might be suitable for use in asphalt. GC-MS results indicated that the bio-crude oil contained hydrocarbons and fatty acids, while the aqueous product was rich in organic acids and cyclic amines. The nitrogen recovery (NR) in the bio-crude oil ranged from 8.41% to 16.8%, which was lower than the typical range of 25%-53% from previous studies.