In the vast realm of energy optimisation, even small advancements can lead to significant benefits, both in terms of operational efficiency and environmental sustainability. Anssum’s recent project in South Africa, the “MEE Control Restructure,” exemplifies this principle, with its focus on refining the control mechanisms of Multiple Effect Evaporators (MEEs) to enhance their performance.

Project Overview

  • Category: Energy
  • Location: South Africa
  • Project: MEE Control Restructure
  • Status: Completed


Multiple Effect Evaporators (MEEs) are critical components in many industrial processes. Their operation, if not optimised, can lead to inefficiencies, increased energy consumption, and operational challenges.

The Challenge

  • Ensure the MEEs operate both efficiently and effectively.
  • Overcome the instability experienced during effect changeovers.
  • Eliminate the reliance on an outdated Model Predictive Control (MPC) system that was no longer fit for purpose.

Anssum's Ingenious Solution

To meet these challenges head-on, Anssum proposed a comprehensive restructure of the MEE’s control:

  • Tuning of the PID Controller: By fine-tuning the Proportional-Integral-Derivative (PID) controller integrated into the MEE system, Anssum was able to enhance stability, especially during effect changeovers. This adjustment not only improved the operational efficiency of the MEEs but also mitigated potential risks associated with abrupt changes.
  • Removing Dependency on Outdated MPC: Anssum identified the outdated MPC as a potential bottleneck for the MEEs’ performance. By phasing out this dependency, the MEEs could operate based on more modern and efficient control mechanisms, ensuring they were fit for contemporary operational demands.

Impressive Outcomes

  • Enhanced Stability: The refined PID controller settings resulted in significantly improved stability during effect changeovers.
  • Boosted Production: The cumulative impact of the MEE Control Restructure led to a notable 6.45% increase in production, showcasing the tangible benefits of the initiative.


The MEE Control Restructure project stands as a testament to Anssum’s dedication to innovation, operational excellence, and sustainability. By embracing modern control techniques and shedding outdated dependencies, Anssum has once again demonstrated its prowess in driving energy efficiency and production enhancement.

Anssum’s commitment to fostering energy efficiency while ensuring operational effectiveness remains unparalleled. Through projects like the MEE Control Restructure, Anssum continues to set industry benchmarks, paving the way for a brighter and more sustainable future.