Complete slurry separation and treatment systems for tunnel boring machines. Enable efficient spoil handling, bentonite recovery, and water recycling for continuous tunnelling operations with worldwide compliance.
Specialised water treatment for metro & tunnelling. TBM slurry, dewatering and construction discharge compliance.
Groundwater treatment for tunnel dewatering operations. Remove suspended solids, adjust pH and manage contaminated water.
Recycle tunnelling wastewater for TBM slurry makeup, dust suppression and concrete batching.
Sediment and suspended solids removal for tunnel construction wastewater.
An overview of TBM slurry treatment — the separation and bentonite-recovery systems that keep a slurry tunnel boring machine advancing. Start here for the big picture, then follow the links into the detailed separation and recovery guides. It introduces the separation cascade — screens, hydrocyclones, desilters and centrifuges — and the bentonite-recovery loop that keeps the machine supplied with conditioned slurry. From here the detailed guides cover the rheology, plant sizing and discharge requirements that turn this overview into a buildable design.
Tunnel Boring Machines (TBMs) generate massive volumes of slurry containing excavated spoil mixed with bentonite or water-based fluids. Effective slurry treatment is essential for continuous tunnelling operations, enabling spoil removal, bentonite recovery for reuse, and compliant water discharge. Reynolds & Bauhm systems handle the high solids loading and variable flow rates typical of TBM operations.
TBMs can generate 500-2,000 m³/h of slurry depending on tunnel diameter and ground conditions. Treatment systems must handle these high volumes continuously.
Slurry typically contains 10-30% solids by weight including soil, rock fragments, sand, and bentonite suspension. Particle sizes range from clay to coarse gravel.
Recovering bentonite for reuse can reduce chemical consumption by 60-80%, significantly lowering operating overheads and environmental impact.
Discharge water must meet local environmental standards for suspended solids, pH, and potentially oil and grease. Reynolds & Bauhm systems ensure compliance with international standards.
Earth Pressure Balance TBMs generate slurry with high clay content requiring specialised separation equipment for fine particle removal.
Hydroshield and slurry TBMs use pressurised bentonite slurry requiring high-capacity separation plants with multi-stage treatment.
Hard rock TBMs produce coarse spoil with sharp fragments requiring robust screening and abrasion-resistant equipment.
Metro and utility tunnels in urban areas require compact treatment systems with low noise and minimal footprint.
Mechanical dewatering of separated solids to reduce spoil volume and transportation costs for off-site disposal.
Closed-loop water systems that treat and recycle process water, minimising freshwater consumption and discharge volumes.
Rotary drum screens remove large debris, rock fragments, and oversized particles from TBM slurry.
Sand traps separate sand and gravel particles to protect downstream equipment from abrasion.
LAMELLA separators or hydrocyclones remove fine solids and clarify the slurry for bentonite recovery.
Centrifuges or specialised separation equipment recover bentonite for reuse in the TBM circuit.
Screw presses dewater separated solids for transport and disposal, reducing volume by 50-70%.
Heavy-duty screening for removing coarse spoil and debris from TBM slurry. Continuous operation with automatic cleaning.
High CapacityRemove abrasive sand and grit to protect pumps and downstream equipment from premature wear in harsh slurry conditions.
Equipment ProtectionCompact clarification for fine solids removal with 70% smaller footprint than conventional clarifiers. Ideal for confined sites.
70% Smaller FootprintLow-energy mechanical dewatering of separated spoil achieving 18-25% dry solids for reduced transport rates.
Volume ReductionPre-engineered, mobile treatment systems in standard containers for rapid deployment and easy relocation.
Rapid DeploymentProcess water and bentonite storage with corrosion-resistant materials and optional agitation systems.
Process IntegrationComplete overview of water treatment solutions for tunnelling and underground construction.
Explore Tunnelling SolutionsComplete separation plants for hydroshield and slurry TBM operations.
Explore Metro SlurryTreatment of groundwater ingress during tunnelling operations.
Explore Metro GroundwaterSediment and contaminant control for surface water runoff.
Explore Metro DewateringDirectory of international wastewater treatment regulations and equipment compliance standards Organised by country and region.
View PageMeet strict environmental discharge requirements for tunnel construction wastewater.
View PageRemove contaminants from tunnel groundwater including heavy metals, hydrocarbons and sulphates for safe discharge.
View PageContact our experts for customised solutions for your tunnelling project.
Our expertise spans multiple industries with sector-specific water treatment solutions.