A high level of gasification can be achieved by CHG technology using the aqueous phase byproduct from hydrothermal liquefaction as the feedstock. In tests we have shown that almost all the organic material was converted to a medium-Btu gas. The gas could be used directly for process heating or further processed to generate pipeline quality natural gas substitute. Because of the low COD of the product water after gasification its reuse seems like a reasonable option. The recycle of the aqueous phase back to feedstock preparation for the liquefaction step would also be reasonable and has potential to reduce the cost of added alkali. The solids separation serves to pretreat the aqueous for use in the gasification by removing insoluble minerals. The tests gave no evidence of catalyst deactivation in this application in that the COD of the effluent remained constant and the gas product composition was essentially unchanged. However, the relatively short tests only provide an initial indication and longer term catalyst lifetime tests would be required.