Co-gasification of wet sewage sludge and forestry waste in situ steam agent

► Co-gasification of wet sewage sludge and forestry waste. ► Addition of forestry waste increased weight loss and the maximum weight loss rate. ► Situ steam from the moisture content of wet sewage sludge increased H2 yield. ► Gas yield reached 0.70 Nm3/kg with the LHV of 11.89 MJ/Nm3 .