A compact, on-site system that separates solids from liquid in continuous concrete slurry duty — reducing disposal volumes, recovering usable material, and improving environmental compliance for a New Zealand industrial client.
Industrial concrete operations generate continuous slurry — solids-laden water that doesn't lend itself to skip-bin disposal. The client needed a compact, on-site system to separate the solids from the liquid: reducing disposal volumes, recovering usable material, and improving environmental compliance, all within the footprint of the existing yard.
Constraints: continuous duty, abrasive load, limited space, existing material-handling routes that couldn't be interrupted.
Designed site-first: the system's shape and footprint were driven by the actual yard, gantry access and material-handling routes rather than the other way around. AS/NZS-aligned structural design and fabrication throughout. Modular layout for future capacity expansion.
Six stages from the first measurement to operator handover.
On-site measurement of actual slurry volumes, solids content and the daily operating cycle. No assumptions — real numbers drove the design.
Throughput sizing, footprint envelope, structural concept, integration with existing site routes and services.
Structural calculations, material selection for abrasion and duty, drainage and overflow design. AS/NZS-aligned throughout.
CNC profiles, welded fabrication, in-workshop trial assembly. QA at each stage.
Delivered and installed on the client's operating site with minimal disruption to existing throughput.
Flow testing, snag clearance, operator walk-through and handover with documentation.
Fits within the original yard footprint. No extension to site boundary required.
Dewatered solids ready for cost-effective disposal or downstream re-use.
Reclaimed water available for site re-use where the process permits.
Reduced waste volume off-site — direct, ongoing operating-cost saving.
Designed and fabricated to AS/NZS for years of continuous-duty operation.
Modular layout allows future capacity increase without redesign.
A few moments from the build and install.
“Designed around how the site actually runs — not how the brochure said it should.” Positive Earth Projects, operating principle
Industrial separation, on-site systems, fabrication-led engineering. Talk to the Projects team.
simon@positivearth.nz