NOVELTY - The system comprises: a pretreatment system (12) free of an aerobic biological treatment in communication with a wastewater influent (100); a primary membrane element (30) in communication with the pretreatment system to receive a pretreatment effluent (14) to produce a product stream effluent; a secondary membrane element (50) in communication with the primary membrane element to receive and filter the product stream effluent and to produce a concentrate stream; and a microbial fuel cell in communication with the secondary membrane element to receive the concentrate stream.    USE - The system is useful for treating a wastewater stream (claimed) to produce product effluent as irrigation water for crops, schools, parks and golf courses or for industrial process water or cooling tower make-up water, where the wastewater includes domestic and industrial wastewater and the system is a membrane anaerobic stabilization system.    ADVANTAGE - The system is capable of energy efficiently treating the wastewater stream at reduced operating and maintenance costs.    DETAILED DESCRIPTION - The system comprises: a pretreatment system (12) free of an aerobic biological treatment in communication with a wastewater influent (100); a primary membrane element (30) in communication with the pretreatment system to receive a pretreatment effluent (14) to produce a product stream effluent; a secondary membrane element (50) in communication with the primary membrane element to receive and filter the product stream effluent and to produce a concentrate stream; and a microbial fuel cell in communication with the secondary membrane element to receive the concentrate stream to convert a dissolved organic material of the concentrate stream to an electronic power, carbon dioxide, and an effluent liquid. A screen element is disposed intermediate the pretreatment system and the primary membrane element to remove bulk solids from the pretreatment effluent. The primary membrane element includes a microfiltration system and an ultrafiltration system. The secondary membrane element includes a reverse osmosis system and a nanofiltration system. The concentrate stream and the effluent liquid are processed in a nutrient removal and recovery process as a source for recovery of the nutrients nitrogen and phosphorus.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a microbial fuel cell in combination with an anaerobic stabilization system.    Pretreatment system (12)    Pretreatment effluent (14)    Primary membrane element (30)    Secondary membrane element (50)    Wastewater influent. (100)