(83a) Enabling a Load-Flexible Operation of an Electrified Downstream Process for Bio-Based Carboxylic Acids
AIChE Annual Meeting
Monday, November 14, 2022 - 8:00am to 8:25am
We developed an electrochemical pH-swing extraction process for the purification of carboxylic acids produced by fermentation [3-6]. This process was developed to avoid the emission of waste salts generated in the conventional downstream process by the addition of acids and bases for pH adjustment. This problem is solved by changing the pH value with protons and hydroxide ions generated by electrolysis. This pH-shift electrolysis also allows the process to operate in a load-flexible manner. To ensure that the upstream fermentation and the following downstream process can run continuously, the pH shift electrolysis is decoupled from the other unit operations. An intelligent load adjustment system (ILAS) was developed that autonomously plans the dynamic operation of the process and adapts the power consumption based on electricity market data. In load-flexible operation the ILAS adjusts the power consumption of the pH-shift electrolysis in such a way that an economic benefit is generated while the production target and quality specifications are maintained.
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