Biological removal of organic constituents in quench waters from high-Btu coal-gasification pilot plants
Studies were initiated to assess the efficiency of bench-scale, activated-sludge treatment for removal of organic constituents from coal-gasification process effluents. Samples of pilot-plant, raw-gas quench waters were obtained from the HYGAS process of the Institute of Gas Technology and from the slagging, fixed-bed (SFB) process of the Grand Forks Energy Technology Center. The types of coal employed were Bituminous Illinois No. 6 for the HYGAS and Indian Head lignite for the SFB process. These pilot-plant quench waters, while not strictly representative of commercial condensates, were considered useful to evaluate the efficiency of biological oxidation for the removal of organics. Biological-reactor influent and effluent samples were extracted using a methylene chloride pH-fractionation method into acid, base, and neutral fractions, which were analyzed by capillary-column gas-chromatography/mass-spectrometry. Influent acid fractions of both HYGAS and SFB condensates showed that nearly 99% of extractable and chromatographable organic material comprised phenol and alkylated phenols. Activated-sludge treatment removed these compounds almost completely. Removal efficiency of base-fraction organics was generally good, except for certain alkylated pyridines. Removal of neutral-fraction organics was also good, except for certain alkylated benzenes, certain polycyclic aromatic hydrocarbons, and certain cycloalkanes and cycloalkenes, especially at low influent concentrations.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 5581798
- Report Number(s):
- ANL/PAG-2
- Country of Publication:
- United States
- Language:
- English
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Biological removal of organic constituents in quench water from a slagging, fixed-bed coal-gasification pilot plant
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Related Subjects
ACTIVATED SLUDGE PROCESS
PERFORMANCE TESTING
COAL GASIFICATION PLANTS
CHEMICAL EFFLUENTS
FUEL GAS
QUENCHING
HYGAS PROCESS
PILOT PLANTS
ORGANIC COMPOUNDS
REMOVAL
WASTE WATER
COAL GASIFICATION
EXTRACTION
GAS CHROMATOGRAPHY
MASS SPECTROSCOPY
CHROMATOGRAPHY
FLUIDS
FUELS
FUNCTIONAL MODELS
GAS FUELS
GASES
GASIFICATION
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
LIQUID WASTES
MANAGEMENT
OXYGEN COMPOUNDS
PROCESSING
SEPARATION PROCESSES
SNG PROCESSES
SPECTROSCOPY
TESTING
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER
010800* - Coal
Lignite
& Peat- Waste Management
010404 - Coal
Lignite
& Peat- Gasification