Every stream leaving a tunnelling site is governed by a discharge consent. A coherent monitoring and polishing strategy keeps the project compliant while recovering as much water as possible for reuse.
Specialised water treatment for TBM slurry, groundwater and construction runoff on underground projects.
Dissolved air flotation for oil, grease and fine-solids removal from equipment washdown water.
Screw and belt presses producing stackable cake from excavated spoil and treatment sludge.
This guide ties the streams together — final polishing, online monitoring and closed-loop reuse — so every discharge stays within consent while cutting mains-water demand. It sits here because compliance is judged at the outfall, where all the upstream treatment is finally proven. Each treated stream is polished to the numeric limits in the consent — typically turbidity, pH, suspended solids, oil and ammoniacal nitrogen — before it leaves site. Continuous instrumentation with data-logging gives both the contractor and the regulator a defensible, time-stamped record, while a closed-loop reuse option keeps as much water as possible on site and out of the discharge entirely.
Consents typically cap suspended solids, pH, turbidity, metals and hydrocarbons simultaneously, so a single stage rarely suffices.
Regulators expect monitoring records demonstrating sustained compliance, not occasional spot samples.
Mains water for slurry make-up and washdown is costly; recovering treated water reduces both demand and discharge volume.
Filtration and, where required, carbon adsorption trim residual solids, metals and hydrocarbons to consent.
Inline pH, turbidity and flow instrumentation with proportional sampling provides continuous compliance evidence.
Treated water is routed back to slurry make-up, wheel-wash and dust suppression, cutting mains demand and discharge.
Self-cleaning and carbon filters delivering final consent-grade quality.
Inline instrumentation and autosamplers with data logging for regulatory reporting.
Clean-water storage and distribution for closed-loop site water reuse.
Reynolds & Bauhm designs and deploys treatment and recovery packages matched to your geology, programme and discharge consent.
Our expertise spans multiple industries with sector-specific water treatment solutions.