NOVELTY - Delivering (M1) a viable biomass population to a target site comprises: (a) providing a biomass population suspended in a medium and contained in a biomass dispersing system; (b) flowing the biomass population through a biomass dispersing device where a finely dispersed viable biomass population is produced; and (c) applying the finely dispersed viable biomass population to a target site.    USE - The method is useful for delivering a viable biomass population to a target site (including oil well site, bioremediation well site or environmental site) which is useful for enhancing oil recovery from an oil well site, and remediating environmental site (all claimed).    ADVANTAGE - The method: prevents cell damage and loss of cell viability while dispersing biomass aggregates; and provides finely dispersed biomass suspension, and thus prevents plugging the well site during biomass injection into the well, and does not disrupt the microbial enhanced oil recovery or bioremediation applications.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a biomass dispersing system for producing finely dispersed viable biomass comprising: the biomass population suspended in a medium and contained in a tank; the biomass dispersing device; and an injecting means, where the biomass dispersing device communicates with the injecting means through a tubing means;    (2) preparing the viable dispersion of the biomass population comprising: flowing biomass population as a feed flow across wedge wire device using tangential flow to produce a permeate flow containing viable dispersion of biomass population;    (3) enhancing oil recovery from an oil well site comprising steps (a) and (b) as above per se and injecting the finely dispersed viable biomass population into an oil well site, where the finely dispersed viable biomass population is effective in releasing oil from the oil well site; and    (4) remediating an environmental site comprising steps (a) and (b) as above per se and applying the finely dispersed viable biomass population to an environmental site, where the finely dispersed viable biomass population is effective in remediating the environmental site.    DESCRIPTION OF DRAWING(S) - The figure illustrates a vertical section of a typical oilfield injection well.    Well (1)    Non-permeable rock strata (2)    Permeable rocks or matrix (3)    Permeable strata (4)    Perforations (6)