The compost extractors of the prior art are essentially batch processors. While attempts to automate the process have been proposed, the automation has been limited to the use of conveyors to deliver organic material to the extractor. The devices of the prior art cannot be used to produce liquid compost on a continuous basis. Moreover, the task of delivering organic material to the extractor, and removal of spent organic material, is a labor-intensive process which has not been automated in prior art devices. Also, the making of liquid compost is an inherently messy procedure, and creates a disposal problem.