TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Apparatus: The barrier means comprises multiple perforations which are blocked in the first configuration and open in the second configuration, especially the barrier comprises multiple elements (especially slidable mounted sleeves), each comprising perforations, being out of register in the first configuration but in register in the second configuration. One of the slidably mounted sleeves forms a wall of the first and second receptacles and another of the slidably mounted sleeves forms a wall of the other of the first and second receptacle means (especially, there are two slidably mounted sleeves). At least one of the slidably mounted sleeves comprises:(a) a pin-receiving means (especially an orifice formed in the slidably mounted sleeve) to allow it to be pinned in an orientation where the slidably mounted sleeves are in register;(b) a guiding flange extending from either one or both sides of the sleeve; and/or(c) a seating flange extending from the bottom of the sleeve.The first receptacle and the second receptacle:(i) comprises slots in at least one of their walls to receive the guiding flange(s) (especially a slot in their floor to receive the seating flange);(ii) are releasably secured together (especially with a bin joining clamp); and/or(iii) comprises a peg formed on its exterior and an elasticized strap is used to secure them together.The bin joining clamp comprises an elongated member pivotally mounted to one of the first/second receptacle means and has a recess adapted to engage a pin mounted on the other of the first/second receptacle means. The apparatus further comprises ventilation means to allow for oxygen to penetrate the organic waste, comprising multiple vent openings in the first and second receptacle means. The vent openings are holes formed in the walls and/or lid of the first and second receptacle means and are especially covered by a mesh material to prevent egress of the organic waste.Preferred Method: The method further comprises:(i) allowing the earthworms to digest (II);(ii) providing a third aliquot (III) of organic waste (especially, positioned where (I) was positioned originally);(iii) allowing the earthworms to migrate into (III); and(iv) removing (II), digested organic waste.Preferred Kit: The kit further comprises securing means for holding the first and second sleeves in orientation with the perforations in alignment, especially a pin adapted to be received in an orifice in each of the first and second sleeves. EXAMPLE - None given.