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 discharge consent.
A tunnel drive generates ~25 m³/h of dewatering water carrying 1,000–3,000 mg/L suspended solids, oil and grease from plant, and a high pH from cement and shotcrete contact. The discharge consent caps TSS, oil and pH tightly. The treatment plant has to ship in a 40ft container, mobilise fast, and move with the drive — making consent from day one.
Step-by-step configuration from raw dewatering water to compliant discharge.
A drum/static screen removes grit and coarse debris that would blind the downstream plant.
Rapid mix and flocculation with coagulant (PAC/FeCl&sub3;) and polymer build settleable floc from the fine solids.
Inclined-plate clarifier settles the floc in a compact footprint; clarified water passes to filtration.
Auto-backwash media filter polishes the clarified water to the outlet TSS target.
Acid dosing brings cement-driven pH back into the 6–9 consent window; settled sludge is dewatered (screw press) for disposal.
The critical equipment that defines performance — not the full bill of materials.
SS 316L frame, PP plates; ~10 m² effective area in a compact footprint.
View EquipmentAcid/coagulant/flocculant dosing and a screw press to dewater the sludge.
View EquipmentRepresentative performance on 1,000–3,000 mg/L tunnel dewatering water.
How this scenario connects to the wider tunnelling capability.
Send us the water analysis, the flow and the discharge consent — we will pick the system class, size it and ship a factory-tested container.
Explore closely-related examples and guides
Send your influent analysis and our engineers assess your process and recommend a tailored treatment solution — free, confidential and no obligation.
Select the regulatory standard for your country — it sets which parameters we need for a compliance-aware process assessment.
Required parameters for the chosen standard are flagged on the sample form. You can still submit a partial set and we will advise what else to test.
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