Patent ID: 8337585

Claim:
A method for removing volatile organic compounds from a fluid stream comprising: a. flowing clean biodiesel into a packing in a housing in a first direction until the packing is wetted; b. continuously flowing contaminated fluid with volatile organic compounds into the housing; c. using a contaminated vapor distribution manifold, creating a second flow of contaminated vapors in a second direction upwardly opposite the first direction; d. continuously allowing contaminated vapors to rise and pass in the second direction through the packing with biodiesel or biomass, forming a cleaned vapor, wherein the packing is disposed between a distribution grid and a packing support grid in the housing; e. continuously allowing cleaned vapor to exit an upper portion of the housing; f. continuously allowing the biodiesel or biomass to fall to a lower portion of the housing in the first direction and exit the housing as recycle contaminated fluid; and g. continuously pumping the recycle contaminated fluid comprising biodiesel or biomass to the recycle contaminated fluid inlet port and flowing the recycle contaminated fluid over the packing until a concentration of volatile organic compounds in the cleaned vapor stream exceeds 100 ppm.