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Title: Treatment of biomass gasification wastewaters using liquid-liquid extraction

Abstract

Pacific Northwest Laboratory (PNL) investigated liquid-liquid extraction as a treatment method for biomass gasification wastewaters (BGW). Distribution coefficients for chemical oxygen demand (COD) removal were determined for the following solvents: methylisobutyl ketone (MIBK), n-butyl acetate, n-butanol, MIBK/n-butyl acetate (50:50 vol), MIBK/n-butanol (50:50 vol), tri-butyl phosphate, tri-n-octyl phosphine oxide (TOPO)/MIBK (10:90 wt), TOPO/kerosene (10:90 wt), kerosene, and toluene. The best distribution coefficient of 1.3 was given by n-butanol. Chemical analysis of the wastewater by gas chromatography (GC) showed acetic acid and propionic acid concentrations of about 4000 mg/1. Methanol, ethanol, and acetone were identified in trace amounts. These five compounds accounted for 45% of the measured COD of 29,000 mg/1. Because of the presence of carboxylic acids, pH was expected to affect extraction of the wastewater. At low pH the acids should be in the acidic form, which increased extraction by MIBK. Extraction by n-butanol was increased at high pH, where the acids should be in the ionic form.

Authors:
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
OSTI Identifier:
6228543
Report Number(s):
PNL-4016
ON: DE82000711
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 09 BIOMASS FUELS; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; BIOMASS; GASIFICATION; BIOMASS CONVERSION PLANTS; WASTE PROCESSING; MANURES; WASTE WATER; CHEMICAL ANALYSIS; ACETIC ACID; ACETONE; BUTANOLS; CARBOXYLIC ACIDS; CHEMICAL OXYGEN DEMAND; ETHANOL; EXPERIMENTAL DATA; GAS CHROMATOGRAPHY; METHANOL; PH VALUE; PROPIONIC ACID; QUANTITY RATIO; REMOVAL; SOLVENT EXTRACTION; AGRICULTURAL WASTES; ALCOHOLS; CHROMATOGRAPHY; DATA; ENERGY SOURCES; EXTRACTION; HYDROGEN COMPOUNDS; HYDROXY COMPOUNDS; INFORMATION; KETONES; LIQUID WASTES; MANAGEMENT; MONOCARBOXYLIC ACIDS; NUMERICAL DATA; ORGANIC ACIDS; ORGANIC COMPOUNDS; ORGANIC WASTES; OXYGEN COMPOUNDS; PROCESSING; RENEWABLE ENERGY SOURCES; SEPARATION PROCESSES; THERMOCHEMICAL PROCESSES; WASTE MANAGEMENT; WASTES; WATER; 520200* - Environment, Aquatic- Chemicals Monitoring & Transport- (-1989); 140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989); 320305 - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Industrial Waste Management

Citation Formats

Bell, N E. Treatment of biomass gasification wastewaters using liquid-liquid extraction. United States: N. p., 1981. Web. doi:10.2172/6228543.
Bell, N E. Treatment of biomass gasification wastewaters using liquid-liquid extraction. United States. https://doi.org/10.2172/6228543
Bell, N E. 1981. "Treatment of biomass gasification wastewaters using liquid-liquid extraction". United States. https://doi.org/10.2172/6228543. https://www.osti.gov/servlets/purl/6228543.
@article{osti_6228543,
title = {Treatment of biomass gasification wastewaters using liquid-liquid extraction},
author = {Bell, N E},
abstractNote = {Pacific Northwest Laboratory (PNL) investigated liquid-liquid extraction as a treatment method for biomass gasification wastewaters (BGW). Distribution coefficients for chemical oxygen demand (COD) removal were determined for the following solvents: methylisobutyl ketone (MIBK), n-butyl acetate, n-butanol, MIBK/n-butyl acetate (50:50 vol), MIBK/n-butanol (50:50 vol), tri-butyl phosphate, tri-n-octyl phosphine oxide (TOPO)/MIBK (10:90 wt), TOPO/kerosene (10:90 wt), kerosene, and toluene. The best distribution coefficient of 1.3 was given by n-butanol. Chemical analysis of the wastewater by gas chromatography (GC) showed acetic acid and propionic acid concentrations of about 4000 mg/1. Methanol, ethanol, and acetone were identified in trace amounts. These five compounds accounted for 45% of the measured COD of 29,000 mg/1. Because of the presence of carboxylic acids, pH was expected to affect extraction of the wastewater. At low pH the acids should be in the acidic form, which increased extraction by MIBK. Extraction by n-butanol was increased at high pH, where the acids should be in the ionic form.},
doi = {10.2172/6228543},
url = {https://www.osti.gov/biblio/6228543}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 01 00:00:00 EDT 1981},
month = {Tue Sep 01 00:00:00 EDT 1981}
}