Market forecasts for bioproducts are upbeat. One even predicts that industrial biotechnology will be a $160 billion global business by 2010. Industrial biotechnology first took off in the early 1980s; what gives today's activity a buzz of excitement is the repeat of something else from that era: high energy prices.
Install a flow meter in the recycle, cascade the flow set point with a pressure control loop. With proper tuning, the valve characteristics are lost in the flow control loop, which should be tuned fast with PI.
DuPont Polyester Technologies (DPT) realizes the benefit of CFX computational fluid dynamics (CFD) modeling software, which provides a multi-size bubble model and manages the complexities involved with modeling a rotating agitator.