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Title: 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 » 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.« less

Authors:
 [1]
  1. 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 referenced in this record:

The impacts of deacetylation prior to dilute acid pretreatment on the bioethanol process
journal, January 2012


Energy-efficient recovery of black liquor through gasification and syngas chemical looping
journal, June 2018


Acetone–Butanol–Ethanol Production from Fermentation of Hot-Water-Extracted Hemicellulose Hydrolysate of Pulping Woods
journal, January 2018


Controlling Porosity in Lignin-Derived Nanoporous Carbon for Supercapacitor Applications
journal, October 2014


Noble-metal catalyzed hydrodeoxygenation of biomass-derived lignin to aromatic hydrocarbons
journal, January 2014


Performance of a newly developed integrant of Zymomonas mobilis for ethanol production on corn stover hydrolysate
journal, February 2004


Dilute-Sulfuric Acid Pretreatment of Corn Stover in Pilot-Scale Reactor: Investigation of Yields, Kinetics, and Enzymatic Digestibilities of Solids
journal, January 2003


Development and characterization of a high-solids deacetylation process
journal, May 2016


Biomass-derived lignin to jet fuel range hydrocarbons via aqueous phase hydrodeoxygenation
journal, January 2015


    Works referencing / citing this record:

    Microbial electrochemical treatment of biorefinery black liquor and resource recovery
    journal, January 2019