Process-water recirculation
Clarify to wash again. The more water recirculates, the less fresh-water top-up and the less dependence on the well or the mains.
Closed loop
Sector solution · Aggregates and quarries
Wash water that is clear, with pH where it should be
In an aggregate plant water is an expensive consumable: it clouds at once, carries fines and the pH rises. We design units from 1 to 50 m³/h to cut suspended solids, correct pH and send the water back to the wash plant instead of throwing it away.
ISO 9001 — certified company
1–50 m³/h — custom sized
Consumables included with the first installation
Typical plant problems
- High turbidityFines that will not settle on their own
- High pHContact with carbonates and cement
- Silted-up pondsFrequent, costly clean-outs
- Fresh-water useContinuous top-up
- Discharge at riskOutside the conditions of your permit
Benefits
Less water, less pond, fewer surprises
The aim is not a handsome unit in a corner: it is that the water returns to the wash plant in condition and the site stops depending on rain and the tanker.
Suspended solids out
Coagulation and flocculation dosed to the real flow so the fines gather and settle, instead of staying in suspension for days.
Effective clarificationpH controlled continuously
Online measurement and automatic pH correction, which in wash water with carbonates or cement residue tends to rise without warning.
Automatic correctionPonds that last longer
Concentrating the fines before the pond cuts how often you empty and clean with machinery, which is usually the hidden cost of the plant.
Less maintenanceManageable sludge
Optional dewatering (filter press or thickener) to go from pumpable sludge to a cake you can haul and stockpile.
Sludge managementData for your own monitoring
Continuous pH and turbidity measurement with a log: an ordered history helps you evidence how the plant is running.
Traceable log
How it works
The treatment line, step by step
Each plant has its material, its flow and its space. These are the stages we combine by case; not all are always needed.
Prior test on your water
A sample of the wash water and a jar test: which coagulant and which flocculant work with your fines, at what dose and at what pH.
pH control
An online probe and corrector dosing to bring the water into the range where flocculation works and the plant can run.
Coagulation and flocculation
Reagent make-up and dosing in proportion to flow, with a mix chamber and gentle flocculation to form a settleable floc.
Settling and recirculation
Clarifier or thickener, return of clarified water to the wash plant, and sludge out to a pond or to dewatering as convenient.
Commissioning and support
Dose adjustment on site, operator training and a consumables plan, with first-installation consumables included.
What a typical installation includes
- Online pH probe and controller with setpoint and alarms
- pH-corrector dosing pump with tank and bund
- Flocculant make-up and dosing unit (powder or emulsion)
- Rapid-mix and flocculation chamber
- Clarifier or thickener, with adjustable sludge draw-off
- Return pumping of clarified water to the wash circuit
- Opcional: deshidratado de sludges y medida de turbidez en continuo
Technical caution. Discharge limit values and reuse conditions are set by the specific permit of each site and the competent river-basin authority. We design the unit for the target your permit or your process sets, not for a generic brochure figure: that is why we always start with a test on your own water.
Specifications
Working range
- Flow rate 1–50 m³/h
- Online pH control
- Suspended solids
- Coagulation + flocculation
- Powder or emulsion flocculant
- Clarifier / thickener
- Return to the wash plant
- Sludge dewatering (optional)
- Continuous turbidity (optional)
- Consumables in the first installation
Who it serves
Where this solution fits
Wherever water gets dirty fast with mineral material and has to go back into the process.
Granite and limestone quarries
Cutting and wash water with fines that stay very stable in suspension, and pH that spikes on limestone.
Aggregate wash plants
Circuits with a trommel, screen and cyclones where the pond cannot keep up and fresh-water top-up spikes.
Concrete and precast
Mixer and plant wash water, with high pH from cement and fine solids.
C&D recycling
Construction and demolition recycling plants with material washing and heavily loaded water.
Civil works and tunnels
Drilling and dewatering water with high turbidity and altered pH, on temporary sites.
Upgrades and improvements
Plants that already have a pond or clarifier and need dosing and control added to actually perform.
Frequently asked questions
Before you ask for a quote
What do you need for a proposal?
Wash flow, type of material (granite, limestone, mixed), current circuit layout, ponds available and a water sample. With the sample we run the jar test and propose reagent and dose.
Can we keep using the pond we already have?
Almost always yes. The usual pattern is to use the pond as storage or as a sludge buffer and add pH control and dosing in front, which is where the performance jump sits.
How much flocculant does it use?
It depends on the material and the fines load; that is why we do not give a figure without a test. After the jar test we deliver an estimated consumption per m³ so you can cost the operation.
Does the unit run automatically?
Yes: dosing is proportional to flow and pH is corrected to a setpoint, with alarms for reagent level and for a reading out of range. The operator supervises; they do not dose by hand.
Study at no obligation
Send us your plant data
We reply with a concrete proposal: stages needed, reagent recommended after the test, and the scope of the install. No puff and no catalogue figures.
- Typical reply in 24–48 working hours
- Jar test on your own water before sizing
- Estimated reagent use per m³ treated
- First-installation consumables included
Prefer to talk it through? 981 88 38 39 · 669 278 974
Write on WhatsApp · comercial.asb.sl@aguassb.com
You may also need
Solutions that often go together
Reuse
When the aim is to close the loop: reclaim the treated water to use it again in washing, haul-road watering or cleaning.
See reuseWastewater and advanced oxidation
For sites with organic load as well as mineral: industrial wastewater treatment with POAC.
See wastewater and POACIs your pond running the plant?
Send us a sample and the circuit data: we run the test and propose the treatment line your plant needs.