Summary report on physical and chemical treatment of UCG condensate and affected groundwaters

Technical Report · Sat Mar 01 04:00:00 EST 1986

OSTI ID:5252530

Nolan, B T

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
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404 -- Coal
Lignite
& Peat-- Gasification
010800* -- Coal
Lignite
& Peat-- Waste Management
ACTIVATED CARBON
ADSORBENTS
ADSORPTION
AROMATICS
CARBON
CARBONACEOUS MATERIALS
CHARS
CHEMICAL COMPOSITION
COAL
COAL GASIFICATION
COAL TAR
CONDENSATES
CONTAMINATION
DATA
DIFFUSION
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FILTRATION
FLOCCULATION
FOSSIL FUELS
FUELS
GASIFICATION
GROUND WATER
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
IN-SITU GASIFICATION
IN-SITU PROCESSING
INFORMATION
LIQUID WASTES
MATERIALS
METALS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OSMOSIS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHENOLS
PRECIPITATION
PROCESSING
PYROLYSIS PRODUCTS
REMOVAL
SEPARATION PROCESSES
SIMULATION
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
TAR
THERMOCHEMICAL PROCESSES
ULTRAFILTRATION
WASTE WATER
WASTES
WATER
WATER TREATMENT