TY - JOUR
T1 - Anaerobic bioprocessing of wastewater-derived duckweed
T2 - Maximizing product yields in a biorefinery value cascade
AU - Calicioglu, O.
AU - Richard, T. L.
AU - Brennan, Rachel A.
N1 - Funding Information:
This project was supported by Agriculture and Food Research Initiative Competitive Grant No. 2012-68005-19703 from the USDA National Institute of Food and Agriculture . The identification of duckweed species by Benjamin J. Roman; sample preparation assistance for VFA and TC analysis by Nicole L. Urban and Kayla R. Wirth; instrument operation guidance for pretreatment by Travis Tasker; and guidance for membrane separation by Boya Xiong are gratefully acknowledged.
Funding Information:
This project was supported by Agriculture and Food Research Initiative Competitive Grant No. 2012-68005-19703 from the USDA National Institute of Food and Agriculture. The identification of duckweed species by Benjamin J. Roman; sample preparation assistance for VFA and TC analysis by Nicole L. Urban and Kayla R. Wirth; instrument operation guidance for pretreatment by Travis Tasker; and guidance for membrane separation by Boya Xiong are gratefully acknowledged.
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/10
Y1 - 2019/10
N2 - This study integrated the sugar and carboxylate platforms to enhance duckweed processing in biorefineries. Two or three bioprocesses (ethanol fermentation, acidogenic digestion, and methanogenic digestion) were sequentially integrated to maximize the carbon-to-carbon conversion of wastewater-derived duckweed into bioproducts, through a series of laboratory-scale experiments. Reactors were fed either raw (dried), liquid-hot-water-pretreated, or enzymatically-saccharified duckweed. Subsequently, the target bioproduct was separated from the reactor liquor and the residues further processed. The total bioproduct carbon yield of 0.69 ± 0.07 g per gram of duckweed-C was obtained by sequential acidogenic and methanogenic digestion. Three sequential bioprocesses revealed nearly as high yields (0.66 ± 0.08 g of bioproduct-C per duckweed-C), but caused more gaseous carbon (dioxide) loss. For this three-stage value cascade, yields of each process in conventional units were: 0.186 ± 0.001 g ethanol/g duckweed; 611 ± 64 mg volatile fatty acids as acetic acid/g VS; and 434 ± 0.2 ml methane/g VS.
AB - This study integrated the sugar and carboxylate platforms to enhance duckweed processing in biorefineries. Two or three bioprocesses (ethanol fermentation, acidogenic digestion, and methanogenic digestion) were sequentially integrated to maximize the carbon-to-carbon conversion of wastewater-derived duckweed into bioproducts, through a series of laboratory-scale experiments. Reactors were fed either raw (dried), liquid-hot-water-pretreated, or enzymatically-saccharified duckweed. Subsequently, the target bioproduct was separated from the reactor liquor and the residues further processed. The total bioproduct carbon yield of 0.69 ± 0.07 g per gram of duckweed-C was obtained by sequential acidogenic and methanogenic digestion. Three sequential bioprocesses revealed nearly as high yields (0.66 ± 0.08 g of bioproduct-C per duckweed-C), but caused more gaseous carbon (dioxide) loss. For this three-stage value cascade, yields of each process in conventional units were: 0.186 ± 0.001 g ethanol/g duckweed; 611 ± 64 mg volatile fatty acids as acetic acid/g VS; and 434 ± 0.2 ml methane/g VS.
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U2 - 10.1016/j.biortech.2019.121716
DO - 10.1016/j.biortech.2019.121716
M3 - Article
C2 - 31323721
AN - SCOPUS:85068463240
SN - 0960-8524
VL - 289
JO - Bioresource technology
JF - Bioresource technology
M1 - 121716
ER -
