NOVELTY - System for generating resources from organic feedstock(s), comprises a grinder/mixer configured to receive an organic feedstock and an isolated rumen; and a mechanically controlled fermenter comprising the isolated rumen, where the mechanically controlled fermenter is configured to ferment the organic feedstock in continuous managed ecosystem fermentation (MEF) to generate a resource.    USE - The system is useful for generating resources from organic feedstock(s) (claimed).    ADVANTAGE - The characteristics of MEF offer some technical advantages as an industrial process. For example, MEF occurs at moderate temperatures and near atmospheric pressures, so construction costs can be lower than processes with much higher temperatures and pressures, such as pyrolysis. Rumen produces toxic materials, as evidenced by long natural lifespans of ruminants, indicating there should be little risk of new toxins entering the environment from rumen based MEF processes. MEF is an anaerobic process operating near neutral pH values, so the liability risk from a spill is limited. Oxygen in the air will quickly halt the process and the fluid is only mildly corrosive at pH of 5-6.5. All of the microbes are naturally occurring, some are soil bacteria, and unlikely to harm plants or groundwater. MEF is robust; ruminant animals can live 20 years without a microbial failure. This robustness of MEF provides lower maintenance expenses in caring for the microbes. MEF is adaptable to different feedstocks. The minimum transition time from grass to grain for cattle is some days. Microbes from cattle rumen also adapt to a wide variety of feedstocks in the lab. This adaptability eliminates the need for strain archiving as used in pharmaceuticals. MEF can be modified by adding additional microbes to the ecosystem. Research with Australian sheep has demonstrated that the ability to digest specific tannins can be acquired by animals receiving additional rumen microbes. MEF does not require a sterilized feedstock. This property avoids a process that could be very difficult and expensive for high volume feedstocks.