Industrial wastewater treatment is becoming more complex as discharge limits tighten, production loads fluctuate, and sludge disposal costs rise. Onschem supplies industrial wastewater treatment chemicals to help manufacturers improve solids removal, reduce COD/TSS in primary treatment, enhance flotation or sedimentation efficiency, and optimize sludge dewatering.
Our main products include Polyacrylamide (PAM) flocculants, Polyaluminium Chloride (PAC), Polyferric Sulfate (PFS) and Polyaluminium Ferric Chloride (PAFC)—supported by application guidance for stable operation and lower total cost per m³.
Pain Points with Coagulants & Flocculants (PAC / PFS / PAFC / PAM)
Unstable coagulation due to pH swings and high organic load
Many industrial wastewaters have fluctuating pH and elevated COD, which can reduce coagulation efficiency and lead to inconsistent effluent.
What needs to change: better coagulant selection and dosing control based on wastewater type (inorganic solids vs. high organics vs. oily emulsions).
Poor solid-liquid separation (clarifier or DAF)
Fine particles, emulsified oil, and low-density flocs can cause slow settling, high turbidity, or DAF carryover.
What needs to change: combine the right coagulant (PAC/PAFC/PFS) with properly selected PAM to build stronger, faster-separating flocs.
Excess polymer consumption and overdosing risk
PAM performance is highly sensitive to type and dosage. Overdosing can create slimy flocs, increase effluent turbidity, or cause filter/DAF issues.
What needs to change: match PAM ionicity and molecular weight to the separation method (sedimentation vs. DAF vs. belt press/centrifuge) and control make-down and feed points.
Sludge dewatering is the biggest operating cost
Industrial sludge often dewaters poorly due to organics, oil, or fine solids.
What needs to change: optimize conditioning chemistry to improve cake solids, reduce sludge volume, and lower hauling/disposal fees.
Chemical quality inconsistency causes operational instability
Variations in active content, solubility, or performance lead to frequent dosage changes and higher risk of non-compliance.
What needs to change: stable specifications, COA/batch traceability, and repeatable treatment programs.
Recommended Chemicals
✔ Anionic PAM – for solid–liquid separation
✔ Cationic PAM – ideal for sludge dewatering
✔ PAC / PAFC – strong coagulation & COD reduction
✔ Activated Carbon – organic removal & decolorization
Typical Industries Served
Textile & dyeing factories
Chemical engineering wastewater
Food & beverage factories
Refinery & oilfield wastewater
Pharmaceutical wastewater
Electroplating and metals industry
Key Advantages
High removal rate of color, SS, COD, BOD
Effective for high-salinity & high-hardness effluents
Strong adaptability to pH & temperature fluctuations
Lower chemical consumption due to optimized molecular design
Service Provided
We offer jar tests, on-site guidance, dosage design, and industry-specific formula recommendations.
FAQ?
Which is better for industrial wastewater: PAC, PFS, or PAFC?
It depends on wastewater composition (solids, organics, oil, color), pH range, and the separation unit (clarifier or DAF). PAC is a common general-purpose coagulant, PFS offers strong coagulation for many high-solids cases, and PAFC can be effective in more complex or high-color/high-organic wastewater.
How do I choose a PAM flocculant for DAF or clarifiers?
Key factors include ionic type, molecular weight, mixing intensity, and the goal (settling vs. flotation vs. dewatering). Incorrect selection or overdosing can increase turbidity or destabilize DAF performance.
Can chemical optimization reduce total wastewater treatment cost?
Yes. Improving separation efficiency reduces rework, downtime, sludge volume, polymer usage, and non-compliance risk—often lowering total cost per treated m³.
Why does my sludge dewater poorly even with more polymer?
Poor dewatering is often caused by incorrect polymer type, insufficient coagulation, oil/grease interference, or suboptimal dosing point and mixing. Optimizing coagulant + PAM conditioning usually improves cake solids more effectively than increasing polymer dosage.
Do you provide product specifications and COA for industrial customers?
Onschem supports customers with standard quality documentation such as specifications and COA to ensure consistent performance and easier operational control.