Finger S M, Hatch R T, Regan T M
Biotechnol Bioeng. 1976 Sep;18(9):1193-1218. doi: 10.1002/bit.260180904.
A conceptual model of aerobic microbial growth in semisolid matrices were developed as a first step in the prediction of the rate of breakdown in semisolid cellulosic material. The conceptual model was described by a series of equations simplified by the assumption of steady-state microbial activity, and heat and mass transfer limitation. Temperature and oxygen distribution in compost piles were measured experimentally at the Butler County Mushroom Farm, Butler County, Pennsylvania, to test the validity of these assumptions. The compost piles consisted of ground corn husks, straw, and race horse manure. The data fit with the model was excellent with deviation between model predictions (as solved by an anglog computer) and actual temperature measurements never exceeding 3 degrees C. The effects of compost pile geometry, external temperature, compost density, external oxygen concentration, and insulation at the bottom of the pile were then predicted using a digital computer to solve the model. The predicitions show that the maximum breakdown rate occurs for an optimum height (which depends upon the system), insulating the base increases the breakdown rate, increasing the external temperature increases the initial breakdown rate but decreases the pseudo-steady-state breakdown rate and the uniformity and any increase in the external oxygen concentration increases the breakdown rate but decreases the uniformity.
作为预测半固体纤维素材料分解速率的第一步，建立了半固体基质中需氧微生物生长的概念模型。该概念模型由一系列通过稳态微生物活性、传热和传质限制假设简化的方程描述。在宾夕法尼亚州巴特勒县的巴特勒县蘑菇农场，对堆肥堆中的温度和氧气分布进行了实验测量，以检验这些假设的有效性。堆肥堆由磨碎的玉米壳、稻草和赛马粪便组成。模型预测值（由模拟计算机求解）与实际温度测量值之间的偏差从未超过3摄氏度，模型与数据拟合得非常好。然后使用数字计算机求解该模型，预测了堆肥堆几何形状、外部温度、堆肥密度、外部氧气浓度和堆底部隔热的影响。预测结果表明，在最佳高度（取决于系统）时分解速率最大，底部隔热会提高分解速率，外部温度升高会提高初始分解速率，但会降低准稳态分解速率和均匀性，外部氧气浓度的任何增加都会提高分解速率，但会降低均匀性。
