BB BioDisc Repair – Douglas, South Lanarkshire
BB BioDisc repair Douglas carried out after a new customer contacted us when their loss of rotation alarm triggered. The plant had suffered years without servicing, leading to multiple mechanical failures. A major drive-train rebuild was required to restore reliable operation.



✅ Issues found on inspection
This older BB BioDisc showed multiple faults linked to lack of maintenance:
- Drive shaft: Corroded and worn, causing excessive movement across the rotor pack.
- Radial arms & clamps: Four arms and twelve clamps failed or cracked, leaving the rotor unstable.
- Pulleys & belt: Worn pulleys and a worn belt prevented correct drive and tracking.
- Bearings: Extremely worn bearings at drive-end and non-drive-end, adding drag and heat.
The combination prevented rotation and triggered the loss of rotation alarm, risking total plant failure.
🔧 Repairs carried out
We removed the old rotors with our lifting frame for safe access, then rebuilt the drive train:
- Replaced the drive shaft with a corrosion-resistant part.
- Installed 4x new radial arms and 12x clamps to secure the rotor pack.
- Fitted new pulleys with a locking element and a new drive belt; set alignment and tension to spec.
- Replaced drive-end and non-drive-end bearings to restore smooth operation.
Final checks included rotor alignment, belt tracking, current draw and alarm proving. The BioDisc now runs quietly and efficiently.
🛑 What happens without servicing
Without routine servicing, shafts corrode, bearings wear out, and pulleys/belts degrade — leading to breakdowns and non-compliance. SEPA expects systems to be maintained to prevent pollution and discharge issues. See guidance at SEPA and manufacturer info from Kingspan/Klargester.
📅 Service agreements available
We offer affordable annual service agreements covering inspections, mechanical adjustments and reporting. Servicing identifies wear early and prevents expensive rebuilds like this.
Coverage across Douglas, Lanark, Larkhall, Lesmahagow and wider South Lanarkshire.
Need sewage treatment plant servicing or sewage pump repairs? Learn more at Kingspan/Klargester and SEPA.
📞 Book a BB BioDisc Repair in Douglas