Carbon change-out services
When granular carbon is spent, we organize the change-out with partner field technicians. One contact for the new carbon, the change-out work and the spent media.
What we change out
- GAC filter adsorbers and GAC caps on dual-media filters at drinking water plants
- Post-filter GAC contactors
- Odour control vessels at wastewater plants and pumping stations
We supply the replacement carbon ourselves, so the new media, the work and the documents come from one place.
How a change-out works
Every site is different. A typical change-out follows these steps.
Site review and planning
We collect vessel drawings, bed volumes and carbon type, check access for trucks and equipment, and agree isolation, lockout and confined space procedures with your operators. The work is scheduled around your production.
Spent carbon sampling
Before removal, the spent carbon is sampled so it can be classified for transport and disposal or reactivation.
Removal
Spent carbon is removed by vacuum or slurry transfer into bulk bags, bins or tankers, depending on the site.
Vessel inspection
While the vessel is empty we check underdrains, nozzles, support media and internal coating, and report what we find with photographs.
Installation of new carbon
New carbon is loaded to the specified depth, soaked to displace air and backwashed to remove fines. At drinking water plants the filter or contactor is then disinfected and sampled according to the plant's procedures before it returns to service.
Spent media and documents
Spent carbon goes to an approved disposal or reactivation facility with the required paperwork. You receive a change-out report with weights, volumes, the Certificate of Analysis of the new carbon and the waste documents.
Request a change-out quotation
Please include the number and size of vessels, carbon type and volume, the date of the last change-out, and site access details.