This report is one of a series prepared by Pacific Northwest Laboratory for the U.S. Department of Energy on treatment of biomass gasification wastewaters. Other reports have dealt with biological treatment, carbon adsorption, chemical precipitation, reverse osmosis, solvent extraction, and wet air oxidation. All the reports include results of experimental work on a laboratory scale. Wastewater used in these studies came from the experimental Synthesis Gas From Manure (SGFM) biomass gasifier at Texas Tech University.