This is an illustrative scenario showing how Reynolds & Bauhm equipment can be configured for this application. Every site has unique requirements — contact us for a solution tailored to your specific wastewater characteristics.
Metro extension project with two TBMs producing 180 m3/h of slurry containing bentonite, rock cuttings, and groundwater. Slurry density 1.15-1.25 kg/L with particle sizes from clay to 20mm gravel. Excavated material must be dewatered to <30% moisture for truck transport while recovered bentonite is recirculated to the TBM.
Step-by-step process configuration from raw wastewater to compliant discharge.
Vibrating screen with 5mm aperture removes coarse rock and gravel fraction. Oversize material at 15-25% moisture conveyed directly to trucks. Reduces downstream solids load by 40%.
Two-stage hydrocyclone battery separates sand fraction (63-2000 micron) from bentonite slurry. Underflow sand at 65% solids discharged. Overflow fines returned to processing.
High-rate lamella thickener raises slurry concentration from 8% to 18% solids. Flocculant polymer dosed at 350 g/tonne dry solids. Overflow water at <100 mg/L TSS returned to TBM circuit.
Decanter centrifuge processes thickened underflow to 28% cake solids. Counter-current bowl design handles variable feed concentrations. Cake conveyed to stockpile for transport.
Clarified water and recovered bentonite pumped back to TBM slurry circuit at 35-45 g/L concentration. Online density monitoring maintains optimal slurry viscosity for face support.
The specific equipment selected for this application, sized for the flow rate and contaminant load.
Double-deck vibrating screen, 5mm top deck, 1mm bottom deck, 200 m3/h capacity, rubber-lined deck.
View Equipment10-inch desanding cyclones, PU-lined, 2-stage, 50 m3/h each, automatic underflow control.
View EquipmentHigh-rate thickener, 120 m2 settling area, flocculant dosing, automatic rake lift.
View EquipmentHorizontal decanter, 420mm bowl, 3,200 RPM, 15 m3/h slurry capacity, 28% cake solids.
View EquipmentRepresentative performance data based on typical operating conditions for this equipment configuration.
Explore the full range of equipment used in this and similar applications.
Discover how these treatment processes connect to form complete wastewater treatment solutions.
Reynolds & Bauhm follows a structured engineering methodology for every project. We begin with detailed wastewater characterisation, process selection based on contaminant profiles, pilot testing where required, and full-scale design with performance guarantees. Our multidisciplinary team of chemical, mechanical, and electrical engineers ensures seamless integration of process, mechanical, and control disciplines.
Comprehensive influent analysis including COD, BOD, TSS, heavy metals, pH, temperature, and flow profiling.
Process flow development with P&IDs, mass balances, and hydraulic modelling validated by CFD where appropriate.
On-site pilot trials validate performance guarantees under actual operating conditions before capital commitment.
FAT, SAT, performance trials, operator training, and handover documentation ensuring operational readiness.
| Pre-Treatment | Screening, grit removal, and flow equalisation |
| Primary Treatment | DAF or lamella clarification for solids and oil removal |
| Secondary Treatment | Biological oxidation (activated sludge, MBBR, or SBR) |
| Tertiary Treatment | Filtration, UV disinfection, or chemical polishing |
| Sludge Management | Thickening and dewatering via belt press or centrifuge |
| Control System | PLC with HMI touchscreen and optional SCADA integration |
| Chemical Dosing | Automated coagulant, flocculant, and pH correction |
| Materials | SS316L, duplex, or rubber-lined carbon steel |
85 – 98% chemical oxygen demand reduction depending on process configuration and influent variability.
90 – 99% suspended solids reduction through combined physical and biological treatment stages.
Tertiary treatment enables up to 80% water recycling for non-potable process applications.
Our engineers will adapt this equipment configuration to your specific wastewater analysis, flow rate, and discharge requirements.
Our expertise spans multiple industries with sector-specific water treatment solutions.