Abstract
<jats:p>The design of clean-in-place (CIP) systems plays a critical role in a company’s ability to develop, validate and maintain optimized cleaning cycles. These systems are needed to reliably remove process residues, prevent product cross-contamination, control bioburden, maintain the equipment surface being cleaned and ensure it is GMP fit-for-use. We wanted to explain the fundamental first principles of CIP and share industry best practices for designing, building, maintaining and troubleshooting CIP systems. These have been documented in our new paper. It demonstrates how robust design and specification phases will ultimately deliver a compliant and reliable system and help avoid costly troubleshooting and waste later in the lifecycle associated with poor design. It does this through detailed and comprehensive discussions of: · The fundamentals and first principles of cleaning and CIP, including temperature, action, concentration and time (TACT) principles · CIP cycle design, including cleaning cycle steps, sustainability and application grids · Equipment design best practices, including CIP skid design and CIP distribution (CIP supply/CIP return) design and the design of equipment to be CIP’d · CIP automation configuration best practices, including general automation practices, circuit design, and CIP cycle timer and sequence optimization. The paper provides a comprehensive guide to designing, operating and maintaining CIP skids for process equipment. The key takeaways from the paper are: · Fundamental principles: effective CIP relies on understanding the nature of process residues and applying the TACT framework to optimize cleaning cycles · Cycle design: the paper details each step of a typical CIP cycle (initial rinse, caustic wash, intermediate rinse, acid wash, final rinse, air blow/drainage), explaining how to tailor parameters for different soils and equipment · Equipment design: CIP skids should be designed for flexibility, scalability and compliance with sanitary standards (e.g. ASME BPE). The paper compares various skid configurations and their suitability for different applications · Automation and instrumentation: best practices for automation, instrumentation and recipe management are discussed to ensure reliable, efficient and traceable cleaning operations • Sustainability: the paper highlights strategies to reduce water, energy and chemical use, such as reusing final rinse water and optimizing cycle timers, supporting both environmental and operational goals. There is no one-size-fits-all solution and CIP skid design should be tailored to facility needs, risk tolerance and sustainability objectives. By following these suggested best practices, organizations can achieve validated, efficient and sustainable CIP operations that support product quality, regulatory compliance and operational excellence.</jats:p>