Treatment System Design for Process Wastewaters from Non-Tar Producing Coal Gasification Technology. Final Report March 1983 - June 1985

摘要

The report documents a study of the treatment of wastewaters from non-tar producing coal gasification processes and indicates that the aqueous wastes are treatable with conventional technology. Wastewater management scenarios for treated effluent discharge and wastewater reuse as cooling tower makeup were examined. A technology evaluation which incorporated wastewater characterization and treatability data for the treatment of wastewaters from non-tar producing coal gasifiers established a single wastewater treatment system to meet both the discharge and reuse water management scenarios. The example treatment system includes steam stripping, equalization, cyanide/thiocyanate conversion for treatment of stripper overheat condensates, biooxidation, and final effluent filtration. This study was performed to expand the existing wastewater data base to include characterization, treatability, and basis-of-design information. The results of laboratory and desk-top evaluations of alternative wastewater treatment technologies produced conceptual designs for wastewater treating facilities to meet discharge and water reuse needs at non-tar producing coal gasification plants.