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.
Underground gold-copper mine producing 350 m3/day of acid mine drainage with pH 2.8, total iron 850 mg/L, aluminium 120 mg/L, copper 45 mg/L, and suspended solids 2,500 mg/L. The water requires neutralisation and metals precipitation before discharge to a receiving stream with limits of pH 6-9, iron <2 mg/L, copper <0.5 mg/L.
Step-by-step process configuration from raw wastewater to compliant discharge.
Acid mine water collected in equalization lagoon with 72-hour retention for flow balancing and partial iron oxidation. Online pH monitoring triggers automated lime dosing.
Hydrated lime slurry (10% w/v) dosed via automated pH control loop targeting pH 7.5. Rapid mix tank with 2-minute retention ensures complete neutralisation and metals precipitation as hydroxides.
Lamella clarifier with 60-degree inclined plates achieves 12 m/h upflow velocity. Settling area of 180 m2 captures precipitated metal hydroxides. Effluent TSS <15 mg/L.
Precipitated sludge at 3% solids thickened to 8% then dewatered via plate filter press to 32% cake solids. Dry cake disposed as non-hazardous waste. Filtrate returned to equalization.
Multimedia sand filter captures residual suspended solids. Effluent pH adjusted to 7.0 with CO2 dosing for final compliance. Discharge meets all stream limits.
The specific equipment selected for this application, sized for the flow rate and contaminant load.
Automated lime slurry preparation with 5 m3 day tank, progressive cavity dosing pump, and pH feedback control.
View EquipmentCarbon steel with epoxy coating, 180 m2 settling area, 60-degree plate angle, bottom hopper sludge collection.
View Equipment800x800 mm plates, 40 chamber, automatic cloth wash, cake discharge to skip. Cycle time 3 hours.
View EquipmentDual-media sand/anthracite, 1.2 m diameter, 8 m/h filtration rate, automatic backwash on headloss.
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.
Online pH monitoring with automated acid/alkali dosing for precise pH control.
View EquipmentDiscover 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.