Biological removal of organic constituents in high-Btu coal gasification wastewaters
Studies have been initiated to assess the efficiency of activated sludge treatment for removal of organic contaminants from coal gasification process effluents. Samples of pilot plant raw gas quench wastewater were obtained from the Institute of Gas Technology's HYGAS process and from the Grand Forks Energy Technology Center (GFETC) slagging fixed-bed process. These wastewaters were subjected to long term biological treatability studies, followed by detailed characterization of organic constituents. The samples were extracted using a methylene chloride pH-fractionation method to neutral, acidic, and basic fractions for analysis by capillary column gas chromotography/mass spectrometry. Influent acid extract samples of both HYGAS and GFETC wastewaters showed that nearly 99% of the total extractable and chromatographable organic material was comprised of phenol and alkylated phenols. Activated sludge treatment removed these compounds almost completely. Influent base extracts of HYGAS and GFETC samples showed alkylated pyridines, anilines, and quinolines; the GFETC sample also showed, as major components, aminopyrroles, imidazoles and/or pyrazoles, and diazines. Removal efficiency of these compounds was generally good, with the exception of certain alkylated pyridines. The influent neutral fractions of both the HYGAS and GFETC samples were comprised of cycloalkanes, cycloalkenes, naphthalene, indole, acetophenone, and benzonitrile. Alkylated benzenes, abundant in the HYGAS sample, were generally absent in the GFETC sample. Removal efficiencies for certain alkylated benzenes, polycyclic aromatic hydrocarbons, and cycloalkanes and cycloalkenes were poor, especially at low influent concentrations.
- Research Organization:
- Argonne National Lab., IL (USA); Carnegie-Mellon Univ., Pittsburgh, PA (USA). Dept. of Civil Engineering
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 6494615
- Report Number(s):
- CONF-8006171-1; ON: DE81023574
- Resource Relation:
- Conference: International conference on water pollution research, Toronto, Canada, 23 Jun 1980
- Country of Publication:
- United States
- Language:
- English
Similar Records
Biological removal of organic constituents in quench waters from high-Btu coal-gasification pilot plants
Removal of organic constituents in a coal gasification process wastewater by activated sludge treatment
Related Subjects
54 ENVIRONMENTAL SCIENCES
ACTIVATED SLUDGE PROCESS
COAL GASIFICATION
WASTE WATER
ORGANIC COMPOUNDS
REMOVAL
ANILINE
AROMATICS
BIOCONVERSION
CYCLOALKANES
CYCLOALKENES
EFFICIENCY
EXPERIMENTAL DATA
HIGH BTU GAS
HYGAS PROCESS
IMIDAZOLES
NAPHTHALENE
PHENOLS
POLYCYCLIC AROMATIC HYDROCARBONS
PYRAZOLES
PYRIDINES
QUINOLINES
SYNTHESIS
WATER TREATMENT
ALKANES
ALKENES
AMINES
AZINES
AZOLES
CONDENSED AROMATICS
DATA
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
LIQUID WASTES
MANAGEMENT
NUMERICAL DATA
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PROCESSING
SNG PROCESSES
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER
010800* - Coal
Lignite
& Peat- Waste Management
520200 - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)
010404 - Coal
Lignite
& Peat- Gasification