NOVELTY - Biological water gas shift reaction system (10) comprises plasma gasifier to gasify carbonaceous feed to form gaseous product comprising synthesis gas, and comprises inlet for feed, outlet for gaseous product and outlet for non-gaseous product, and is operable at operating temperature and pressure; and deep shaft reactor (30) to ferment microorganism suspension capable of net water-gas splitting. The reactor comprises inlet(s) for fermentation feed gas and outlet for fermentation product comprising hydrogen gas; and has vertical depth, shaft width and normal operating fill line.    USE - As a biological water gas shift reaction system (claimed) for producing carbon monoxide which is converted to hydrogen which is used to create electricity.    ADVANTAGE - The carbon monoxide water shift system provides new technique of reducing green house gas. As the CO2 produced by the biomass is neutral (i.e. not considered a greenhouse gas emission), the present system provides novel carbon capture technology. The system is designed such that the pressure of operation, the concentration of biomass within each of reactors, and/or the carbon monoxide content of the feed gas to each reactors are modified (i.e. the depth varied) to provide optimum conditions for bacterial fermentation. Design of system with deep shaft reactors in series with various inlet concentrations of carbon dioxide in the fermentation feed gas and/or various depths allow manipulation of the optimum operating conditions (toxicity points) of the bacteria. Such serial design within carbon monoxide water shift reaction system provides flexibility in operation when the gasifier feed materials utilized in gasifier feed inlet line varies, changing the fermentation feed gas obtained from it.    DETAILED DESCRIPTION - A biological water gas shift reaction system (10) comprises a plasma gasifier operable to gasify carbonaceous feed material to produce gaseous product comprising synthesis gas, and comprises a gasifier inlet for carbonaceous feed material, gasifier outlet for gaseous product comprising synthesis gas and gasifier outlet for non-gaseous gasification product, where the gasifier is operable at an operating temperature and operating pressure; and a deep shaft reactor (30) fluidly connected to the gasifier and configured for fermentation of a suspension of microorganisms capable of net water-gas splitting. The reactor comprises at least one reactor inlet for a fluid comprising fermentation feed gas and a reactor outlet for fermentation product comprising hydrogen gas. The reactor has a vertical depth, a shaft width, and a normal operating fill line. The gasifier outlet for gaseous product is fluidly connected with the at least one reactor inlet for a fluid comprising fermentation feed gas such that at least a portion of the carbon monoxide in the fermentation feed gas may be obtained from the gasifier. The system further comprises unit for injecting the fluid comprising fermentation feed gas to at least one location within fast flow zone of the reactor, and is configured such that, during operation, gas lift provides an upward linear velocity within the fast flow zone that is greater than a downward linear velocity within the slow flow zone; retention chamber (80) to produce a fluid saturated with fermentation feed gas; extraction apparatus (90) to produce a mixture of a fluid and fermentation feed gas comprising carbon monoxide and to raise the pressure of the mixture prior to introduction of the mixture into the retention chamber via the retention chamber inlet; at least one hydrogen recovery or utilization unit (110) comprising a hydrogen recovery or utilization unit inlet in fluid communication with the outlet for fermentation product comprising hydrogen gas, and configured to increase the purity of the hydrogen in the fermentation product gas or convert at least a portion of the hydrogen in the fermentation product gas to a useful product; illumination assembly configured to photoactivate microorganisms in the suspension; at least one temperature-reduction apparatus; and particulate removal device configured to reduce the concentration of particulates in the gaseous product comprising synthesis gas. The unit for injecting the fluid comprises at least one high pressure pump and at least one rotary head nozzle.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a carbon monoxide water shift reaction system.    Carbon monoxide water shift reaction system (10)    Deep shaft reactor (30)    Retention chamber (80)    Biomass extraction unit (90)    Plasma gasification subsystem (100)    Hydrogen recovery subsystem (110)