Hydrogen recovery from organic wastes: Reactor development and improvement

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: a. 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; b. Integration structure with mixing reaction area and deposit-separating area is selected, i.e. gas-liquid-solid phase separation unit; c. 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; d. H₂ in the particle and Liquid phase is accelerated to release to prevent accumulated H₂ from bringing feedback inhibition to organism metabolism, and H₂/CO₂ conversion to acetic acid; e. A sector turbine agitator with hoisting capacity and mixing power is selected to facilitate sludge to flow back through a effluence seam; f. Interior wall in the reaction area is equipped with vertical baffles to avoid causing swirling flow of mixture liquid owing to agitation.