Summary report on physical and chemical treatment of UCG condensate and affected groundwaters
Several unit operations were evaluated for ability to treat Hanna IVB UCG condensate and UCG-affected groundwaters. These treatment processes included coagulation-precipitation, reverse osmosis (RO), ultrafiltration (UF), microporous filtration (MPF), and carbon-adsorption with coal and char. The objectives of the experiments were to remove colloidal and suspended solids, dissolved inorganics, and soluble organics from UCG wastewaters. In coagulation-precipitation experiments, a 60 mg/L dose of polymer Purifloc C-31 resulted in removal of 99.0% of the 2 to 90 ..mu..m-diameter particles and 92.9% of the acetone-soluble tar from Hanna IVB condensate. Similarly, addition of 50 gm/L of polymer DEAE-Dextran resulted in removal of 98.3% of the 2-90 ..mu..m-diameter particles and 95.2% of the acetone-soluble tar. Reverse osmosis treatment of Hanna groundwater reduced sulfate and total dissolved solids by 99.4% and 98.9%, respectively. Acetone-soluble tar was reduced by 77.0% during a UF experiment performed with a 50% conversion rate. Removals of soluble organics by UF were negligible, however. Treatment of simulated wastewater by MPF with powdered-activated-carbon addition effected much greater removals of dissolved organic carbon and phenols. Metals were also successfully removed by this configuration. Total organic carbon (TOC) and phenols in simulated wastewater were effectively adsorbed onto coal and char. The TOC removals by adsorbents were 71.4 to 92.6% with simulated wastewater and 11.2 to 37.5% with Hanna IVB condensate. The adsorption of TOC from simulated wastewater onto coal was well described by both the Langmuir and Freundlich isotherm models. The Freundlich isotherm best described the adsorption of TOC from simulated wastewater onto char. The adsorption of contaminants from Hanna IVB UCG condensate was poorly described by both isotherm models. 18 refs., 16 figs., 12 tabs.
- Research Organization:
- Western Research Inst., Laramie, WY (USA)
- DOE Contract Number:
- FC21-83FE60177
- OSTI ID:
- 5252530
- Report Number(s):
- DOE/FE/60177-2204; ON: DE87000625
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHARS
SORPTIVE PROPERTIES
COAL
COAL TAR
REMOVAL
GROUND WATER
CONTAMINATION
IN-SITU GASIFICATION
WASTE WATER
ORGANIC COMPOUNDS
PHENOLS
CHEMICAL COMPOSITION
WATER TREATMENT
ACTIVATED CARBON
ADSORPTION
COAL GASIFICATION
CONDENSATES
EXPERIMENTAL DATA
FLOCCULATION
METALS
OSMOSIS
PRECIPITATION
SIMULATION
ULTRAFILTRATION
ADSORBENTS
AROMATICS
CARBON
CARBONACEOUS MATERIALS
DATA
DIFFUSION
ELEMENTS
ENERGY SOURCES
FILTRATION
FOSSIL FUELS
FUELS
GASIFICATION
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
IN-SITU PROCESSING
INFORMATION
LIQUID WASTES
MATERIALS
NONMETALS
NUMERICAL DATA
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PROCESSING
PYROLYSIS PRODUCTS
SEPARATION PROCESSES
SORPTION
SURFACE PROPERTIES
TAR
THERMOCHEMICAL PROCESSES
WASTES
WATER
010800* - Coal
Lignite
& Peat- Waste Management
010404 - Coal
Lignite
& Peat- Gasification