Wastewater treatment train for fixed bed coal gasification. Semi-annual progress report, May 1-October 31, 1980
The objective of this research is to develop a series of procedures that enable wastewater from a stirred fixed bed gasification process to be treated in an environmentally acceptable manner. Experiments are conducted on a laboratory scale using samples of gasifier wastewater. The linkage of processes used include sulfide stripping, pH adjustment followed by free and fixed ammonia removal, pH adjustment for chemical precipitation of organics, and biological treatment in an activated sludge type configuration. The pre-treatment technique employed provides almost 50% organic removal from the wastewater prior to biological processing; with the organics being accumulated into the sludge phase. The interaction of generated sludges with RCRA regulations is the subject of additional research. A series of continuous biological reactors is operational with hydraulic detention times of 1.0 days, and sludge ages in excess of 20 days. A removal in excess of 80% of COD is accomplished by the biological reactors when the wastewater is pre-treated by the manner developed.
- Research Organization:
- Pittsburgh Univ., PA (USA). Dept. of Civil Engineering
- DOE Contract Number:
- AC21-80MC14372
- OSTI ID:
- 6875881
- Report Number(s):
- DOE/MC/14372-6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL GASIFICATION PLANTS
WASTE WATER
WATER TREATMENT
ACTIVATED SLUDGE PROCESS
AMMONIA
COAL GASIFICATION
EXPERIMENTAL DATA
PACKED BED
PHENOLS
POLLUTION CONTROL
AROMATICS
DATA
GASIFICATION
HYDRIDES
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INDUSTRIAL PLANTS
INFORMATION
LIQUID WASTES
MANAGEMENT
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PROCESSING
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER
010404* - Coal
Lignite
& Peat- Gasification