Abstract: An apparatus and a process for injecting fluids while prevents backflow are provided. The apparatus comprises a) a hollow core pipe with an open end and a closed end, and containing exit ports in the peripheral wall that are closed when there is no, or low fluid pressure; b) a stationary valve seat, fitted in the pipe; c) an axial sliding plug, disposed to be received in the valve seat where there is no or low fluid pressure thereby closing the exit ports wherein an increase in fluid pressure causes the plug to slide toward the closed end and the opening of the exit ports; and d) a spring held in place between the slidable plug and the closed end, the spring continuously urging the plug in a direction away from the closed end.

Abstract: A process and apparatus for the in-situ bioremediation of aquifers contaminated with chemicals by delivering a chemical degrading bacterial culture using a bacterial slurry delivery apparatus, which is designed to prevent backflow of soil and clogging of the apparatus, and a networked oxygen delivery system.