PROCESSES FOR PRODUCING H2S USING SULPHUR-REDUCING BACTERIA

摘要

There is provided a process for producing H2S comprising: a) continuously providing an electron donor at a variable rate to a biosolution comprising sulphur reducing bacteria; b) reacting elemental sulphur with HS to from soluble polysulphide; c) providing said polysulphide to a bioreactor having the biosolution, thereby producing H2S gas in the bioreactor; and d) continuously removing H2S gas from the bioreactor, wherein an average rate of providing polysulphide to sulphur reducing bacteria is equal to an average rate of polysulphide consumption by the sulphur reducing bacteria.