08/12/2025
We recently toured the innovative Histopathology lab at 1,000 Discovery Drive, and we’re thrilled to share some of their standout sustainable features! 🎉
1 - Enhanced Formalin Process 🧪
Formalin (10% buffered formaldehyde) is a potent chemical utilised for preserving biological specimens, and can cause irritation to the eyes, nose, and throat, and it is classified as a probable or known human carcinogen if used unsafely. In the past at CUH, formalin was disposed of through the sinks, diluted with large amounts of water. This method not only posed challenges in handling (due to heavy containers) but also generated excessive waste.
In their new build, the histopathology department has implemented an innovative system: formalin is now delivered unpackaged in two 600-litre containers via lorry, and is stored in a secure, monitorable tank on Level 1 using a pump system. A smaller tank, fed by the original larger tank, is situated on Level 5. This setup utilizes gravity to distribute formalin through stainless steel pipes to the lab benches located on Level 4.
The waste formalin is directed through a specific piped network to another large tank on Level 1. This tank is then emptied by the same lorry that delivers the fresh formalin, and the waste is neutralized and disposed of properly. This process is not only the first of its kind in the NHS but also in the UK, significantly reducing waste and water contamination, while enhancing staff productivity and safety.
Stay tuned this week as we highlight more of their green changes! 🌍