Treatment of biomass gasification wastewaters using liquid-liquid extraction

Technical Report · Tue Sep 01 04:00:00 EDT 1981

DOI:https://doi.org/10.2172/6228543· OSTI ID:6228543

Bell, N E

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.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6228543
• Report Number(s): PNL-4016; ON: DE82000711
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
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32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
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54 ENVIRONMENTAL SCIENCES
ACETIC ACID
ACETONE
AGRICULTURAL WASTES
ALCOHOLS
BIOMASS
BIOMASS CONVERSION PLANTS
BUTANOLS
CARBOXYLIC ACIDS
CHEMICAL ANALYSIS
CHEMICAL OXYGEN DEMAND
CHROMATOGRAPHY
DATA
ENERGY SOURCES
ETHANOL
EXPERIMENTAL DATA
EXTRACTION
GAS CHROMATOGRAPHY
GASIFICATION
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
KETONES
LIQUID WASTES
MANAGEMENT
MANURES
METHANOL
MONOCARBOXYLIC ACIDS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC WASTES
OXYGEN COMPOUNDS
PH VALUE
PROCESSING
PROPIONIC ACID
QUANTITY RATIO
REMOVAL
RENEWABLE ENERGY SOURCES
SEPARATION PROCESSES
SOLVENT EXTRACTION
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER