Low-rank coal research under the UND/DOE cooperative agreement. Quarterly technical progress report, July-September 1983
Two long gasification tests were accomplished (66 and 72 hours of slagging operation) this quarter, and the balance of the wastewater needed for the second cooling tower (CT) test (approx. 11,000 gallons) was generated. Eleven thousand gallons of slagging fixed-bed gasifier (SFBG) wastewater were solvent extracted and ammonia stripped (AS) to nominal levels of 160 mg/1 phenol and 600 mg/1 NH/sub 3/. This wastewater is being further treated by activated sludge (AS) and granular activated carbon (GAC) processing to prepare a high quality makeup for the second CT test. Phenol mass balances indicated that > 90 pct of the phenol was stripped from the tower, indicating that previous assumptions of high levels of biodegradation were erroneous. Over 80 pct of the ammonia and about 25 pct of the methanol were also stripped. Data collected during steady state operation of the bench-scale rotating biological contractor indicate complete removal of phenolics and alcohols, and 94 pct removal of BOD. Nitrification also occurred in this unit, with over 30 pct removal of ammonia. Problems due to individual bacteria, present in the biotreated wastewater, passing through the multi-media filter and thus decreasing the carbon adsorption efficiency of the GAC system, have resulted in lower treatment rates than originally anticipated. As a result, to achieve the desired treatment, the contact time of the wastewater with the carbon in the granular activated carbon system has been increased. Since this has decreased the treatment rate, a larger carbon adsorption system has been designed and is presently being constructed.
- Research Organization:
- North Dakota Univ., Grand Forks (USA). Energy Research Center
- DOE Contract Number:
- FC21-83FE60181
- OSTI ID:
- 5496352
- Report Number(s):
- DOE/FE/60181-26; ON: DE84002700
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010000* -- Coal
Lignite
& Peat
010800 -- Coal
Lignite
& Peat-- Waste Management
014000 -- Coal
Lignite
& Peat-- Combustion
ACTIVATED CARBON
ACTIVATED SLUDGE PROCESS
ADSORBENTS
AIR POLLUTION CONTROL
ALCOHOLS
AROMATICS
ASHES
BIODEGRADATION
BROWN COAL
CARBON
CARBONACEOUS MATERIALS
CATALYSTS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL
COAL FINES
COAL GASIFICATION PLANTS
COAL LIQUEFACTION
COAL LIQUIDS
COAL PREPARATION
COAL RANK
COMBUSTION
CONTROL
COOLING TOWERS
DATA
DECOMPOSITION
DEVOLATILIZATION
DISPERSIONS
DISSOLUTION
DRYING
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
EXTRACTION
FABRIC FILTERS
FILTERS
FILTRATION
FLUIDIZED-BED COMBUSTION
FLUIDS
FOSSIL FUELS
FUEL SLURRIES
FUELS
GRAVIMETRIC ANALYSIS
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
HYDROXY COMPOUNDS
INDUSTRIAL PLANTS
INFORMATION
LEACHATES
LEACHING
LIGNITE
LIQUEFACTION
LIQUID WASTES
LIQUIDS
MANAGEMENT
MATERIAL BALANCE
MATERIALS
MECHANICAL STRUCTURES
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
PERFORMANCE
PHENOLS
POLLUTION CONTROL
PROCESSING
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
RESEARCH PROGRAMS
RESIDUES
SEPARATION PROCESSES
SLAGS
SLURRIES
SOLUTIONS
SOLVENT EXTRACTION
SULFUR COMPOUNDS
SULFUR OXIDES
SUPERCRITICAL GAS EXTRACTION
SUSPENSIONS
TEMPERATURE DEPENDENCE
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES
TOWERS
VISCOSITY
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER TREATMENT