Treated tunnel water is a resource, not just an effluent. Recycling it for wheel-wash, dust suppression, grout make-up and TBM supply cuts mains demand and the volume needing discharge.
Urban tunnelling sites face two pressures at once: scarce discharge capacity and high water demand for wheel-wash, dust suppression, grout mixing and TBM operation. Recycling treated water answers both. By polishing treated water to the quality each reuse needs and storing it for demand, we cut mains consumption and reduce — sometimes eliminate — the volume that has to be discharged under consent.
Fit-for-Purpose Reuse
Different reuses need different quality: wheel-wash and dust suppression tolerate modest solids, while grout and TBM make-up need cleaner water. We match the polishing to each duty, provide buffer storage to bridge supply and demand, and arrange the system so treated water is preferentially reused before any is discharged. The discharge plant then only handles the genuine surplus.
Treated water is reused first; only the surplus is discharged.
Polishing matched to wheel-wash, dust, grout or TBM quality needs.
Storage bridges the gap between treated supply and reuse demand.
Recycled water cuts costly mains consumption on site.
Making Recycling Reliable
Reuse only works if the water suits the duty and is always available when the site needs it.
Each reuse has its own quality threshold to design for.
Storage must match treated supply to peaky site demand.
Urban discharge limits make reuse a necessity, not an option.
From Treated Water to Reuse
Buffer tanks hold treated water for reuse demand.
Mains makes up only the genuine shortfall.
Only the true surplus is discharged under consent.
Plant We Build Into This Stage
Recycle treated water for slurry make-up, dust suppression and batching.
View EquipmentMultimedia and pressure filters polish settled water to tight TSS limits.
View EquipmentHigh-rate inclined-plate settlers cut suspended solids in a compact footprint.
View EquipmentPre-assembled, road-transportable treatment trains that relocate as work advances.
View EquipmentMobile, skid-mounted dewatering treatment for rapid deployment.
View EquipmentSediment and suspended-solids removal for tunnel construction water.
View EquipmentWhy Choose Reynolds & Bauhm
Explore Tunnelling Dewatering
Talk to our engineers about a system sized for your tunnel, flow and discharge consent.
Our expertise spans multiple industries with sector-specific water treatment solutions.