Micro-aerobic straw pretreatment and hydrogen and marsh gas combined fermentation system and method

Abstract

The invention discloses a micro-aerobic straw pretreatment and hydrogen and marsh gas combined fermentation system. The micro-aerobic straw pretreatment and hydrogen and marsh gas combined fermentation system comprises a photosynthetic hydrogen production reactor and a marsh gas fermentation tank which are respectively connected with a pretreatment reacting tank, wherein during the pretreatment of crop straws, a percolate produced in the pretreatment reacting tank serves as a raw material and is conveyed to the photosynthetic hydrogen production reactor for hydrogen production, and a solid-state material produced in the pretreatment reacting tank enters a tank body of the marsh gas fermentation tank for fermentation. According to the micro-aerobic straw pretreatment and hydrogen and marsh gas combined fermentation system, the crop straws are subjected to pretreatment by using the pretreatment reacting tank, and the percolate, containing micromolecules formed through straw degradation, is fed into the photosynthetic hydrogen production reactor and serves as a hydrogen production raw material, so that the disadvantage that the straws are difficultly utilized by photosynthetic bacteria is overcome, and meanwhile, the condition that the illumination inside the photosynthetic hydrogen production reactor is non-uniform caused by direct feeding is avoided; meanwhile, the pretreated straws are conveyed into the marsh gas fermentation tank, so that heat and an easy-to-use raw material are provided for marsh gas fermentation. The system and the method have the advantage that straw pretreatment, photosynthetic hydrogen production and marsh gas fermentation are organically combined together.

Description

technical field [0001] The invention relates to a hydrogen biogas fermentation system, in particular to a straw micro-aerobic pretreatment hydrogen biogas combined fermentation system and method. Background technique [0002] Hydrogen energy is a recognized clean energy and the main alternative energy in the future society. Compared with fossil fuel-based chemical hydrogen production, biological hydrogen production has the advantages of less environmental pollution, mild reaction conditions, and abundant raw material sources. As a biological hydrogen production method, photosynthetic hydrogen production uses photosynthetic bacteria to use light as the driving force, and converts organic matter into hydrogen through the photosynthetic bacteria's own biochemical metabolism. In the process of photosynthetic hydrogen production, photosynthetic bacteria can process raw materials such as starch, molasses wastewater, livestock and poultry manure wastewater, and straw. Among these...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a straw microaerobic pretreatment hydrogen biogas combined fermentation system and method, which can carry out aerobic, microaerobic and biogas biological pretreatment on crop straws, and use the generated leachate as photosynthetic hydrogen production The raw material of the reactor is used for hydrogen production, which overcomes the disadvantage that the straw is not easy to be used by photosynthetic bacteria, avoids the uneven illumination in the photosynthetic hydrogen production reactor caused by direct feeding, and at the same time transports the pretreated straw to the biogas fermentation tank to generate biogas Fermentation provides heat and readily available raw materials

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