Development and Improvement of Bioreactor for Fermentative Hydrogen Production

Development and Improvement of Bioreactor for Fermentative Hydrogen Production

The paper reviewed hydrogen production biotechnology on reactor development and design aspects. Biological hydrogen-producing reactor as acid-producing phase of two-phase anaerobic organism treatment system plays an important role in the following aspects: Reactor was developed as the follow ideas: 1) CSTR-type anaerobic fermentation reactor is selected to reduce the substrate concentration in reactor and increase target product operational yield and selectivity in the reactor;2)Integration structure with mixing reaction area and deposit-separating area is selected, i.e. gas-liquid-solid phase separation unit; 3)Mixture liquid in reaction area is stirred by the stirrer to reach a turbulent state in order to reduce interfacial layer thickness and temperature gradient in a floc unit particle and increase mass transfer rate;4) H2 in the particle and liquid phase is accelerated to release to prevent accumulated H2 from bringing feedback inhibition to organism metabolism, and H2/CO2conversion to acetic acid; 5) A sector turbine agitator with hoisting capacity and mixing power is selected to facilitate sludge to flow back through a effluence seam; 6 ) Interior wall in the reaction area is equipped with vertical baffles to avoid causing swirling flow of mixture liquid owing to agitation.