Abstract: There is disclosed a system, method and apparatus for generating renewable energy from common waste streams in a low-carbon manner. This system is modular and applicable to operations of a range of sizes. The system comprises a waste homogenization system; a feedstock preparation component involving dilution, nutrient adjustment, and mixing; a pretreatment tank; a hydrolysis tank; and an optional photosynthetic bioreactor. Through use of the system, organic waste is converted into biohydrogen (H2) and/or biomethane (CH4). The choice between producing each gas individually or in combination is controlled via selective treatment of the incoming waste.