Abstract: Animal waste conversion into animal feed in a process and system including an electrochemical cell in which cell electrolytic conditions are controlled to promote growth of waste aerobic bacteria, without forming oxygen bubbles, and to produce hydrogen bubbles which are collected in the cell and then, in a fuel cell, converted into D.C. electricity that is utilized to supply the major portion of the electricity employed in the conversion cell. The system and process utilizes relatively concentrated waste liquor feeds to the conversion cell, e.g., from about 15% to about 10% total solids, and is adapted for continuous operations, e.g., as a supplemental feed-producing compliment to livestock-raising operations.