Biological treatment of Grand Forks Energy Technology Center slagging fixed-bed coal gasification process wastewater. Eleventh quarterly report, March 1979

Technical Report · Mon Jan 01 04:00:00 EST 1979

OSTI ID:5203691

Luthy, R G; Sekel, D J; Tallon, J T

A wastewater biological treatability study was performed with effluent from the Grand Forks Energy Technology Center slagging fixed-bed coal gasification process. Bench scale air activated sludge reactors were used to determine minimum dilution requirements, maximum acceptable loadings, biological treatment kinetic coefficients, and other performance characteristics. It was found that ammonia stripped wastewater could be processed reliably at 33% strength at substrate removal rates less than approximately 0.6 mg COD removed/mg MLVSS-day. The wastewater when diluted to 33% strength contained highest reported concentration of organic contaminants in coal conversion effluents processed successfully by air activated sludge. The bacterial yield coefficient for treatment of 33% strength stripped wastewater was 0.29 COD basis, the endogenous respiration rate coefficient was 0.038 day/sup -1/, COD basis. Raw wastewater with no ammonia removed could be processed at 40% strength. Nitrification was feasible with both stripped and unstripped wastewater. COD removal rates which impaired nitrification were dependent on ammonia loading, as nitrification could be sustained at higher values of substrate rate with unstripped wastewater than was observed with stripped wastewater.

• Research Organization: Carnegie-Mellon Univ., Pittsburgh, PA (USA). Dept. of Civil Engineering
• DOE Contract Number: EX-76-S-01-2496
• OSTI ID: 5203691
• Report Number(s): FE-2496-42
• 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 SLUDGE PROCESS
AMMONIA
BENCH-SCALE EXPERIMENTS
COAL GASIFICATION
COAL GASIFICATION PLANTS
DATA
DATA FORMS
DILUTION
EXPERIMENTAL DATA
FUNCTIONAL MODELS
GASIFICATION
GRAPHS
HYDRIDES
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
INFORMATION
LIQUID WASTES
MANAGEMENT
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUMERICAL DATA
OXYGEN COMPOUNDS
PILOT PLANTS
PROCESSING
REMOVAL
TABLES
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER TREATMENT