TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The cultivation system includes a floating bioreactor. The system is configured to be floated. The recovery system is further configured to: recover nutrients from the waste; provide the nutrients to the cultivation system; and direct gaseous waste from the treatment system to the carbon dioxide generation system. The system further comprises: a dewatering system configured to dewater the biomass produced by the cultivation system; a carbon dioxide generation system configured to concentrate carbon dioxide out of an input gas stream received from the recovery system and to provide the concentrated carbon dioxide to the cultivation system; a cogeneration system configured to provide heat and electricity to the treatment system, and receive at least some of the biogas from the digester; a hydrogen production system configured to receive at least some of the biogas from the digester, to produce molecular hydrogen from the methane fraction of the biogas, to produce molecular hydrogen by electrolysis of water, and to provide molecular hydrogen to the refining system; and a synthesis system configured to receive at least some of the carbon dioxide from the carbon dioxide generation system and at least some of the molecular hydrogen from the hydrogen production system and to synthesize an olefin from the carbon dioxide and molecular hydrogen. The recovery system includes a digester configured to receive the waste from the treatment system and to produce biogas from the waste. The hydrogen production system includes a steam methane reformer and a steam gasifier. The treatment system is configured to receive the molecular hydrogen. The refining system is configured to receive the organic phase from the treatment system and to produce a fuel from it. The system is configured to provide waste gases from the refining system to the hydrogen production system. The treatment system includes a first hydrothermal reactor configured to receive the biomass and to produce a first mixture including an organic phase and an aqueous phase; and a first separation system configured to separate the organic phase from the aqueous phase and to provide the aqueous phase to the recovery system. The first mixture includes a solid phase. The treatment system further includes a second hydrothermal reactor configured to receive the solid phase and to produce a second mixture including an organic phase and an aqueous phase, and a second separation system configured to separate the second mixture into the organic phase and the aqueous phase.