Waste is a problem that should be solved urgently otherwise, it will have impacts on the economy, environment, and peoples’ health. Therefore, using waste to produce energy is one option to reduce this environmental problem. From my thesis in Thailand, I interested waste from the market. The Market produces about 65 tons of waste per day as cabbage 40 tons per day. At present, began to be interested in renewable energy to replace the energy from coal and oil. Which of biomass or waste to convert to energy, it is one of the renewable energy. However, several studies have shown that waste can successfully be used to produce energy by using Hydrothermal liquefaction.