TY - JOUR
T1 - Advanced treatment of hydrothermal liquefaction wastewater with nanofiltration to recover carboxylic acids
AU - Zhang, Xuesong
AU - Scott, John
AU - Sharma, Brajendra K.
AU - Rajagopalan, Nandakishore
N1 - Funding Information:
This study was supported partially by the postdoctoral fellowship of Illinois Sustainable Technology Center, University of Illinois at Urbana-Champaign, and ISTC ICR HWRF – ARIES Reserve (Award Number: 1-200250-807000-807011-A39; Award Number: 1-200250-807000-807002-A38). We thank Ms. Jennifer Deluhery for carrying out some of the preliminary work related to this study.
Publisher Copyright:
© 2018 The Royal Society of Chemistry.
PY - 2018/4
Y1 - 2018/4
N2 - This study aimed to evaluate the innovative application of nanofiltration technology for the concentration and recovery of carboxylic acids from HTL wastewater. Four synthetic HTL wastewater solutions were processed by nanofiltration under both acidic (initial pH of ∼2.6) and alkaline (pH 8-10) environments. At alkaline pH, the permeate flux was much lower. A high DOC rejection of 82.5% was observed at pH 8 compared to a low DOC rejection of 17.3% at the initial pH of ∼2.6. Isobutyric acid was rejected to a higher degree relative to other carboxylic acids, exhibiting up to 95% rejection at pH 8. Phenol, butanone, and pyridine exhibited low rejection under the alkaline environment indicating that they can be separated from carboxylic acids. Nanofiltration technology presents a potential pathway to both concentrate and subsequently recover carboxylic acids from HTL wastewater.
AB - This study aimed to evaluate the innovative application of nanofiltration technology for the concentration and recovery of carboxylic acids from HTL wastewater. Four synthetic HTL wastewater solutions were processed by nanofiltration under both acidic (initial pH of ∼2.6) and alkaline (pH 8-10) environments. At alkaline pH, the permeate flux was much lower. A high DOC rejection of 82.5% was observed at pH 8 compared to a low DOC rejection of 17.3% at the initial pH of ∼2.6. Isobutyric acid was rejected to a higher degree relative to other carboxylic acids, exhibiting up to 95% rejection at pH 8. Phenol, butanone, and pyridine exhibited low rejection under the alkaline environment indicating that they can be separated from carboxylic acids. Nanofiltration technology presents a potential pathway to both concentrate and subsequently recover carboxylic acids from HTL wastewater.
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U2 - 10.1039/c8ew00007g
DO - 10.1039/c8ew00007g
M3 - Article
AN - SCOPUS:85044769713
SN - 2053-1400
VL - 4
SP - 520
EP - 528
JO - Environmental Science: Water Research and Technology
JF - Environmental Science: Water Research and Technology
IS - 4
ER -