【摘要】 压力脉动用于固态发酵主要是对一个密闭低压容器内的气相压力施以周期脉动,固体培养基为静态,通过气相的压力波动,使发酵料层内的气相传质由分子扩散变为强制对流扩散。气体产生的力为法向力,利用法向力动量传递手段强化传质。压力脉动发酵系统由空气调节系统和发酵系统两部分组成。压力脉动具有强化功能,可解决固态发酵传热、传质差和难于大规模纯种培养等问题。现已实现纯种培养与大规模产业化生产,在抗生素、酶制剂、有机酸、食品添加剂、生物农药和生物肥料方面得到广泛应用,但也存在操作条件的确定、优化及失水等问题。更多还原

【Abstract】 In solid fermentation, solid substrate is in static state and air pressure is in periodical pulsation. Air pressure pulsation in the fermenter could change gas mass transfer in fermented materials layer from molecular diffusion to compulsory convection-diffusion through pressure oscillation of gas phase. The normal force produced by air pressure pulsation could enhance mass transfer. Air pressure pulsation system is composed of air adjustment system and fermentation system. The use of air pressure pulsation system could settle the problems in practice including heat trans- fer in solid fermentation, large-scale pure species culture, and bad mass transfer etc. because the system has strengthening functions. The use of the system has realized pure species culture and large-scale industrialized production and was widely used in the fields of antibiotics, enzymes, organic acids, food additives, biofertilizers etc. However, there are some difficulties in the system as follows: operation conditions, technical optimization and water lose etc.更多还原