Understanding the chemistry and engineering behind effective particle aggregation for superior water and wastewater treatment.
Electrocoagulation systems using sacrificial metal anodes to generate coagulants in-situ for emulsion breaking, metal removal.
Illustrative scenario: Seasonal brewery producing 500 m3/day with COD 7,500 mg/L, BOD 4,800 mg/L, colour 600 Pt-Co, and suspended.
Flocculation tanks with controlled gentle mixing. Promote agglomeration of destabilised particles into settleable flocs.
Illustrative scenario: Large mixed brewery-dairy wastewater plant processing 800 m3/day with combined COD 9,000 mg/L.
Coagulation and flocculation are essential physicochemical processes that transform microscopic, stable particles into larger, settleable flocs that can be efficiently removed from water.
Natural particles in water carry like charges that keep them suspended. Understanding this stability is key to effective treatment.
Coagulants introduce opposite charges that neutralise particle surfaces, destabilizing colloids and enabling aggregation.
Long-chain polymers physically bridge between particles, creating larger flocs that settle rapidly.
Hydroxide precipitates formed by metal coagulants physically trap and sweep particles from solution.
Rapid mixing of coagulant with water to destabilise colloidal particles through charge neutralisation.
Gentle mixing promotes particle collisions, allowing microflocs to aggregate into larger, visible flocs.
Large flocs settle by gravity or are removed by flotation, leaving clarified water.
Traditional coagulant effective over a wide pH range (5.5-7.5). Economical choice for municipal and industrial applications.
Best for: General purpose, drinking water
Highly effective coagulant that works at lower pH and temperatures. Produces dense, fast-settling flocs.
Best for: Cold water, phosphorus removal
Pre-polymerized aluminium coagulant with lower alkalinity consumption and reduced sludge production.
Best for: Low alkalinity water, reduced sludge
Alternative iron-based coagulant with good performance across pH range 4-11.
Best for: Industrial wastewater, colour removal
Negatively charged polymers ideal for inorganic solids and mineral slurries. High molecular weight for effective bridging.
Best for: Mining, sand washing, mineral processing
Positively charged polymers effective for organic solids and biological sludge conditioning.
Best for: Municipal sludge, food wastewater
Achieves 90-99% removal of suspended solids, turbidity, and associated pollutants.
Removes 90-99% of bacteria and viruses attached to particles.
Complete process in 30-45 minutes compared to hours for advanced biological treatment.
Physicochemical systems require significantly less space than biological alternatives.
Precision coagulant and polymer dosing equipment for accurate chemical delivery.
View Dosing SystemsHigh-intensity mixers for rapid dispersion of coagulants throughout the water stream.
Designed for gentle, controlled mixing to promote floc growth without shear damage.
Dissolved air flotation for removing light flocs and oils that don't settle easily.
View DAF SystemsHigh-rate sedimentation for efficient floc removal in a compact footprint.
View ClarifiersAutomated polymer preparation systems for optimal flocculant activation.
View Polymer StationsIn-depth physics, chemistry and equipment guides for coagulation and flocculation
Zeta potential, the double layer and the DLVO balance of attraction and repulsion that keep colloids stable.
View GuideThe four coagulation mechanisms and the dose, pH and mixing that select between them.
View GuideVelocity gradient G, the Camp number Gt, Smoluchowski kinetics and tapered flocculation design.
View GuideDose and pH matrices, mixing simulation and translating bench results to plant set-points.
View GuideAlum, ferric, PACl and polymers compared by optimum pH, dose, sludge and acid demand.
View GuideFlash mixers, flocculators, lamella and conventional clarifiers, DAF and polymer make-up systems.
View GuideComplete engineering guide to DAF system design including hydraulic loading, air-to-solids ratio, saturator sizing, coagulation.
View PageContainerised electrocoagulation systems for heavy metals, emulsified oils, colloidal solids, paint wastewater.
View Containerised OptionFlash mix and flocculation tanks for rapid coagulant dispersion and gentle floc growth.
Our engineers can help you select the right chemicals and design the perfect system.
Our expertise spans multiple industries with sector-specific water treatment solutions.
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.
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