Liu Jing, Olsson Gustaf, Mattiasson Bo
Department of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, Lund SE-226 46, Sweden.
Biotechnol Bioeng. 2004 Jul 5;87(1):43-53. doi: 10.1002/bit.20088.
A new control strategy has been introduced for operating anaerobic digestion processes efficiently at high load. The control system includes a cascade controller embedded into a rule-based supervisory system based on extremum-seeking control. Three process parameters, considered to be the most realistic variables for monitoring of the bioprocess, were selected (pH, biogas production rate, and the difference between the actual biogas flow and its setpoint). The control system examines these variables and varies the organic load by manipulating the influent flow. Good control performance was achieved during the start-up, during steady-state running operations, and during rejection of disturbances. The main advantages of this control approach can be attributed to its ability to adjust control parameters automatically, both for high-load operation and for rejection of disturbances. Furthermore, the influent flow can be tuned automatically according to variations in organic matter in the feed without the characteristics of the influent being considered.
一种新的控制策略已被引入，用于在高负荷下高效运行厌氧消化过程。该控制系统包括一个嵌入基于极值搜索控制的规则基监督系统中的串级控制器。选择了三个被认为是监测生物过程最实际的变量的过程参数（pH值、沼气产生率以及实际沼气流量与其设定值之间的差值）。控制系统检查这些变量，并通过操纵进水流量来改变有机负荷。在启动期间、稳态运行期间以及干扰排除期间都实现了良好的控制性能。这种控制方法的主要优点可归因于其能够自动调整控制参数，无论是在高负荷运行还是在干扰排除方面。此外，进水流量可以根据进料中有机物的变化自动调整，而无需考虑进水的特性。
