WASTE TO ENERGY PROCESS COMPRISING BIOLOGICAL WATER SHIFT REACTION USING CARBON MONOXIDE PRODUCED VIA GASIFICATION TO PRODUCE HYDROGEN

摘要

A waste to energy method comprising: gasifying a feed material comprising waste, to produce gasifier gaseous product comprising synthesis gas and a gasifier non-gaseous product; biologically converting carbon monoxide in a fermentation feed gas to produce a fermentation product gas comprising hydrogen, wherein at least a portion of the carbon monoxide is obtained from the gasifier gaseous product; and utilizing at least a portion of the fermentation product gas comprising hydrogen as fuel. Biologically converting may comprise introducing a fermentation feed gas into a deep shaft reactor, wherein the deep shaft reactor contains a suspension comprising a liquid nutrient medium lacking a carbon source and photoactivated microorganisms capable of carrying out the water-gas shift reaction; has a vertical depth and a shaft width; comprises a downcomer and a riser separated by a divider; and comprises a headspace above a normal operating suspension fill line.