Recycling of Dilute Deacetylation Black Liquor to Enable Efficient Recovery and Reuse of Spent Chemicals and Biomass Pretreatment Waste
Abstract
Previous publications showed deacetylation/dilute alkaline pretreatment followed by mechanical refining (DMR) is an effective process for overcoming biomass recalcitrance. To successfully commercialize alkaline-based pretreatments, we pioneered a new process modification and strategy to recycle and reuse the weak black liquor (WBL) to reduce water, chemical, and energy usage while increasing the solids, sodium, acetate, sugars, and lignin contents in the weak black liquor. Our results suggest that the accumulation of both chemicals and organic matter did not reduce acetyl and lignin removal in alkaline pretreatment, resulting in comparable sugar yields in enzymatic hydrolysis. Sodium and potassium were found to be the two most important inorganic substances in the recycled weak black liquor. Moreover, the accumulated sodium and phenolic compounds did not inhibit the downstream fermentation and ethanol fermentation processes. Finally, techno-economic analysis (TEA) showed the recycling of weak black liquor could decrease the minimum ethanol selling price (MESP) by approximately 5 to 15 cents per gallon of ethanol when compared to a conventional non-recycling process. solids, sodium, acetate, sugars, and lignin contents in the weak black liquor. Our results suggest that the accumulation of both chemicals and organic matter did not reduce acetyl and lignin removal in alkaline pretreatment, resultingmore »
- Authors:
-
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Publication Date:
- Research Org.:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Bioenergy Technologies Office
- OSTI Identifier:
- 1559430
- Report Number(s):
- NREL/PR-5100-74639
Journal ID: ISSN 2296-598X
- DOE Contract Number:
- AC36-08GO28308
- Resource Type:
- Conference
- Resource Relation:
- Journal Volume: 6; Conference: Presented at the Conversion-Ready Feedstocks: Research Webinar 2, 20 June 2019, Washington, D.C.
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 09 BIOMASS FUELS; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; mechanical refining; DMR; biomass recalcitrance; solids; sodium; acetate; sugars; lignin; black liquor
Citation Formats
Chen, Xiaowen. Recycling of Dilute Deacetylation Black Liquor to Enable Efficient Recovery and Reuse of Spent Chemicals and Biomass Pretreatment Waste. United States: N. p., 2019.
Web. doi:10.3389/fenrg.2018.00051.
Chen, Xiaowen. Recycling of Dilute Deacetylation Black Liquor to Enable Efficient Recovery and Reuse of Spent Chemicals and Biomass Pretreatment Waste. United States. https://doi.org/10.3389/fenrg.2018.00051
Chen, Xiaowen. Thu .
"Recycling of Dilute Deacetylation Black Liquor to Enable Efficient Recovery and Reuse of Spent Chemicals and Biomass Pretreatment Waste". United States. https://doi.org/10.3389/fenrg.2018.00051. https://www.osti.gov/servlets/purl/1559430.
@article{osti_1559430,
title = {Recycling of Dilute Deacetylation Black Liquor to Enable Efficient Recovery and Reuse of Spent Chemicals and Biomass Pretreatment Waste},
author = {Chen, Xiaowen},
abstractNote = {Previous publications showed deacetylation/dilute alkaline pretreatment followed by mechanical refining (DMR) is an effective process for overcoming biomass recalcitrance. To successfully commercialize alkaline-based pretreatments, we pioneered a new process modification and strategy to recycle and reuse the weak black liquor (WBL) to reduce water, chemical, and energy usage while increasing the solids, sodium, acetate, sugars, and lignin contents in the weak black liquor. Our results suggest that the accumulation of both chemicals and organic matter did not reduce acetyl and lignin removal in alkaline pretreatment, resulting in comparable sugar yields in enzymatic hydrolysis. Sodium and potassium were found to be the two most important inorganic substances in the recycled weak black liquor. Moreover, the accumulated sodium and phenolic compounds did not inhibit the downstream fermentation and ethanol fermentation processes. Finally, techno-economic analysis (TEA) showed the recycling of weak black liquor could decrease the minimum ethanol selling price (MESP) by approximately 5 to 15 cents per gallon of ethanol when compared to a conventional non-recycling process. solids, sodium, acetate, sugars, and lignin contents in the weak black liquor. Our results suggest that the accumulation of both chemicals and organic matter did not reduce acetyl and lignin removal in alkaline pretreatment, resulting in comparable sugar yields in enzymatic hydrolysis. Sodium and potassium were found to be the two most important inorganic substances in the recycled weak black liquor. Moreover, the accumulated sodium and phenolic compounds did not inhibit the downstream fermentation and ethanol fermentation processes. Finally, techno-economic analysis (TEA) showed the recycling of weak black liquor could decrease the minimum ethanol selling price (MESP) by approximately 5 to 15 cents per gallon of ethanol when compared to a conventional non-recycling process.},
doi = {10.3389/fenrg.2018.00051},
url = {https://www.osti.gov/biblio/1559430},
journal = {},
issn = {2296-598X},
number = ,
volume = 6,
place = {United States},
year = {2019},
month = {8}
}
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Works referencing / citing this record:
Microbial electrochemical treatment of biorefinery black liquor and resource recovery
journal, January 2019
- Chen, Xi; Katahira, Rui; Ge, Zheng
- Green Chemistry, Vol. 21, Issue 6