| 摘要 |
Apparatus and process for improving the yield of harvested marketable shellfish obtained originally from contaminated water sources including a stainless steel enclosure 12, formed of an angle bar open frame defining a bottom 19, four sides (not designated) and an open top 20. A pair of hinged closure doors 22, 23 serve to selectively close top 20 of enclosure 12. A heavy gauge stainless steel mesh 21 is welded to the frame of enclosure 12 and doors 22, 23. In operation, contaminated shellfish 13 are harvested from known contaminated waters under the supervision of a government inspector. Enclosure 12 is filled with the contaminated shellfish to a depth of approximately six-inches, or approximately half-volume, and the inspector seals the container with seal 30 through eyelets 27, 28. Seal 30 is numbered and/or dated by the crimping tool at 30a and the enclosure transported to and deployed in known uncontaminated waters for a period of at least fifteen days. The enclosure location is marked by identification buoy 17 attached to enclosure 12 via rope 16. After the fifteen day self-purging by the shellfish they are considered clean and may be marketed. The enclosure 12 is then retrieved by grasping ring 18 with suitable on-board harvesting gear and seal 30 may then be broken (under the supervision of the government inspector) and the clean shellfish removed. The yield for this "second" harvest has proved to be approximately ninety-five percent of the first harvest with the approximately five percent loss being due to shell breakage during handling. This is in comparison to an approximately eighty percent maximum recovery where the shellfish are deployed directly onto the bottom of the uncontaminated water for their self-purging stay.
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