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Title: 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.
Authors:
; ;
Publication Date:
OSTI Identifier:
6875881
Report Number(s):
DOE/MC/14372-6
DOE Contract Number:
AC21-80MC14372
Resource Type:
Technical Report
Research Org:
Pittsburgh Univ., PA (USA). Dept. of Civil Engineering
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 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