Applicant hierarchical fuzzy controller for concentration control of simulated moving bed

Abstract

Simulated moving bed (SMB) is a kind of continuous process which can increase the efficiency of adsorbents in the adsorbent bed. It contains several sectors of flow rate, the switching time of valves and many other possible influencing variables, moreover, these parameters are highly sensitive, so it is very difficult to achieve precise prediction and control. Model predictive control and PID controller are often used in industrial system. Model predictive control needs a lot of accurate industry experience data, and PID controller depends on the selection of control parameters. Therefore, SMB needs an intelligent controller to bypass those complex mechanisms and parameter adjustment processes. This paper we propose the hierarchical fuzzy controller fuzzy controller which is applied to the SMB system to observe the final concentration. Compared with the PID and MPC controller, it is found that the hierarchical fuzzy controller can control good without knowing the system parameters too accurately.

Synthesis of Trehalose by the Erythritol-Producing Yeast Yarrowia lipolytica Co-Displaying Maltooligosyltrehalose Synthase and Maltooligosyltrehalose Trehalohydrolase

“…All byproducts were then converted into glucose by amyloglucosidase (Figure S6B). In industry, glucose and trehalose are further separated by chromatography before crystallization, which is costly and complicated to operate . Biological purification is a low-cost and easy-to-operate method for the purification of sugar-containing liquid .…”

“…In industry, glucose and trehalose are further separated by chromatography before crystallization, which is costly and complicated to operate. 38 Biological purification is a low-cost and easy-to-operate method for the purification of sugar-containing liquid. 39 Meanwhile, YlxsT08 could not use trehalose, so we produced cells for the next round of trehalose production by adding a nitrogen source to the mixture of glucose and trehalose in situ.…”