Biological treatment of Grand Forks Energy Technology Center slagging fixed-bed coal gasification process wastewater. Eleventh quarterly report
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). Center for Energy and Environmental Studies
- DOE Contract Number:
- EX-76-S-01-2496
- OSTI ID:
- 5368799
- Report Number(s):
- FE-2496-42
- Country of Publication:
- United States
- Language:
- English
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010800* -- Coal
Lignite
& Peat-- Waste Management
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Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
550700 -- Microbiology
59 BASIC BIOLOGICAL SCIENCES
AMMONIA
BACTERIA
BIOCHEMICAL OXYGEN DEMAND
BIODEGRADATION
CHALCOGENIDES
CHEMICAL OXYGEN DEMAND
CHEMICAL REACTIONS
COAL GASIFICATION
DATA
DATA FORMS
DECOMPOSITION
DIAGRAMS
DILUTION
EXPERIMENTAL DATA
FLOWSHEETS
GASIFICATION
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
LIQUID WASTES
MANAGEMENT
MICROORGANISMS
NITRATES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUMERICAL DATA
OXYGEN COMPOUNDS
PH VALUE
PHOSPHATES
PHOSPHORUS COMPOUNDS
PROCESSING
SLUDGES
SULFATES
SULFIDES
SULFUR COMPOUNDS
TABLES
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER TREATMENT