NOVELTY - An intermodal container comprises a subchassis including a subframe (100); a subfloor (150) sealed to a bottom of the subchassis; and a perforated floor (140) adjacent to a top of the subchassis. The subframe includes ventilation holes (120) and drainage holes (110) passing through an exterior of the subframe; and beams extending laterally in the subframe. The beams have holes through which ventilation and drainage passes. The perforated floor is adjacent to the enclosed volume. The container defines an enclosed volume suitable for both shipping and bioconversion.    USE - As an intermodal container useful for shipping and bioconversion; useful as a bioconversion container (claimed) for bioconversion processes (e.g. aerobic and anaerobic composting, bio-filtration and bio-remediation); and particularly useful as an International Standard Organization (ISO) Ocean Freight Container.    ADVANTAGE - The intermodal container is suitable for the dual purposes of bio-containment and intermodal shipping. The intermodal container exhibits water-tight construction to form a liquid tight container, in which provision is made for introduction of water, oxygen or other liquids/gases to be treated in the container, for exit of liquids or gases generated/converted in the container, and for monitoring the biological processes occurring in the container. The container provides improved air ducts and flow paths, while reducing the effects of shrinkage and channeling through strategically-placed openings and floor; provides improvements in air distribution, by eliminating or reducing the percentage of opening through the floor in areas that are immediately adjacent to the container side walls. The flooring incorporates a self-cleaning hole design which increases in diameter with increasing distance from the container contents, where the increase in diameter is achieved through smooth and continuous increments or discontinuous increments. The holes do not clog when the container is filled with matter, or when the container is vibrated and jolted during handling and transport. In the intermodal container for bioconversion, the contents undergo bioconversion during transit to an intended destination. Hence, the shipping time can be used for bioconversion, reducing the total time required for shipping and bioconversion of the content. There is no additional loading or handling required for the container content, except the loading of the container on the vehicle/ship. When the bioconversion time is greater than the shipping time, working with the intermodal container, provides great time saving. The container is simply washed, and then used for other cargo. By converting the conventional prior-art intermodal container into the container suitable for bioconversion and shipping, while preserving compliance with international standards for shipping containers, the inventional container can be used for one way transport of bioconversion materials, and also for return shipment of other cargo. In addition, the conversion is achieved in less capital than that required for converting the container into a single function bioconversion container.    DETAILED DESCRIPTION - An intermodal container comprises a subchassis including a subframe (100); a subfloor (150) sealed to a bottom of the subchassis; and a perforated floor (140) adjacent to a top of the subchassis. The subframe includes ventilation holes (120) and drainage holes (110) passing through an exterior of the subframe; and beams extending laterally in the subframe. The beams have holes through which ventilation and drainage passes. The perforated floor is adjacent to the enclosed volume. The container defines an enclosed volume suitable for both shipping and bioconversion. The enclosed volume contains an organic matter. The container further comprises replaceable smooth side walls within the enclosure. The replaceable smooth side walls are preferably rotatable about each axis, for even wear during dumping. The perforated floor preferably comprises plastic flooring; or wood flooring in combination with plastic flooring, where the wood flooring is solid and imperforate, and the plastic flooring is perforate. INDEPENDENT CLAIMS are included for the following:    (1) a method of converting a conventional intermodal container to the intermodal container suitable for shipping and bioconversion, involving forming ventilation and drainage holes in the subchassis; perforating the floor adjacent to a top surface of subchassis and adjacent to the enclosed volume of container; and coupling a subfloor adjacent to a bottom surface of the subchassis distal to the first surface; and    (2) an array of intermodal containers comprising an element for coupling the intermodal containers, and ventilation in array of intermodal containers; where each container separately forms a liquid tight container, and the array is oriented with an opening into each container such that the liquid tight container beneath the opening is suitable for containing bio-matter.    DESCRIPTION OF DRAWING(S) - The figure shows a floor panel in combination with a sub-floor beam framework, of an intermodal container.    subframe (100)    drainage holes (110)    ventilation holes (120)    channels (130)    channel legs (134)    perforated floor (140)    subfloor (150)    wall (160)    forklift access points in containers. (170)