English
Home > Application > Chemical Industry
As a Chinese water treatment chemical manufacturer with 28 years of experience, we know that chemical wastewater is often diverse in composition, toxic in nature, and subject to strict discharge standards. Over decades of collaboration with chemical factories worldwide, we’ve learned that:
1. Different industrial sectors produce wastewater with distinct pollutants and challenges.
2. Correct product selection and process design are key to effective wastewater treatment.
Below, we classify chemical wastewater based on industry and typical pollutants.
| Category | Typical Industries | Main Pollutants | Characteristics |
|---|---|---|---|
| Petrochemical Wastewater | Refineries, chemical complexes | Oils, organic compounds, high COD | Emulsified, deeply colored, hard to biodegrade |
| Pharmaceutical Wastewater | API plants, pharma factories | Antibiotics, intermediates, ammonia | Toxic, poor biodegradability |
| Dye and Pigment Wastewater | Dye synthesis & manufacturing | High colority, COD, sulfur compounds | Persistent color, stable molecules |
| Pulp & Paper Chemical Wastewater | Pulp mills | Lignin, fibers, suspended solids | High concentration, low biodegradability |
| Inorganic Chemical Wastewater | Fertilizer plants, metallurgy | Heavy metals, ammonia, phosphates | Corrosive, contains multiple ions |
| Stage | Recommended Product | Function |
|---|---|---|
| 1. Coagulation | Polyaluminum Chloride (PAC), Ferric Sulfate (FS), Polyferric Sulfate (PFS) | Removes TSS, lowers COD |
| 2. Flocculation | Polyacrylamide (PAM) | Enhances sedimentation |
| 3. Adsorption | Activated Carbon (Powder/Granular) | Removes color, odor & residual organics |
| 4. COD/BOD Boost | Sodium Acetate, Glucose | Improves biodegradability & microbial growth |
| 5. Ammonia/Fluoride Removal | PDADMAC, Aluminum Sulfate, ACH | Removes nitrogen, fluorides |
⚪Polyacrylamide (PAM): Dissolve at 0.1% concentration, stir for 30–60 minutes. Use after PAC or PFS.
⚪ Polyaluminum Chloride (PAC): Prepare a 10% solution. Add before PAM for optimal floc formation.
⚪Polyferric Sulfate (PFS): 200–800 ppm dosage; ideal for high-COD, high-color wastewater.
⚪Activated Carbon: Use in multi-layer filtration or adsorption columns for maximum efficiency.
Watch our PAC & PAM synergy test video on YouTube: How PAC + PAM Clarify Chemical Wastewater in Seconds
| Product | Packaging | Storage Requirements |
|---|---|---|
| Polyacrylamide (PAM) | 25kg woven bags/kraft bags | Store in dry, cool, ventilated places |
| Polyaluminum Chloride (PAC) | 25kg woven bags | Keep sealed, avoid moisture |
| Polyferric Sulfate (PFS) | 25kg woven bags or 1-ton bags | Protect from humidity |
| Activated Carbon | 25-50kg bags | Keep in cool, dry areas |
| Sodium Acetate / Glucose / ACH | Customized | Avoid heat and humidity |
Q1: Should I use PAC or PFS for chemical wastewater?
A1：PAC works better when oil and acid are present. PFS is more effective for high-COD, high-color industrial wastewater.
Q2: How do I choose the right PAM type for flocculation?
A2：Determine whether the suspended particles in the wastewater are positively or negatively charged, and choose cationic or anionic PAM accordingly. Jar tests are recommended.
Q3: Why add sodium acetate or glucose before biological treatment?
A3：These carbon sources enhance microbial activity and improve COD/BOD degradation.
Q4: What is PDADMAC used for?
A4：It is ideal for suspensions with negatively charged particles, such as in dyeing or metallurgical effluents, especially for fluoride or colloid removal.
⚪Why PAC Is an Irreplaceable Coagulant in Industrial Wastewater?
Please contact us for free quotation by form below. We promise the quickest response within 24 hours: