The paper and pulp industry generates large volumes of wastewater containing lignin, cellulose, organic matter, suspended solids, and chemicals. Proper treatment is essential to meet environmental regulations and protect water resources. We provide high‑performance chemicals to help you achieve clean discharge.

Key Contaminants in Paper Mill Wastewater

Paper and pulp wastewater typically contains:

• Lignin & cellulose – color and organic load
• Suspended solids – fibers, fillers, and fines
• Organic compounds – COD/BOD from pulping and bleaching
• Toxic substances – residual chemicals (e.g., chlorine compounds)

• Foaming agents – from papermaking processes

Effective treatment removes these contaminants to meet local discharge limits.

Our Chemical Solutions for Paper Mill Wastewater Treatment

We supply a complete range of treatment chemicals, broadly grouped by function.

Coagulation (Particle Destabilization)

• Chemicals: Aluminum Sulfate (Alum), PAC (Polyaluminium Chloride), Ferric Chloride, Polyamine

• Function: Neutralize charges of fine particles and colloids, allowing them to clump together for easier removal.

Flocculation (Floc Formation)

• Chemicals: PAM (Polyacrylamide) – anionic, cationic, and nonionic grades; PolyDADMAC

• Function: Bridge and bind coagulated particles into larger, faster‑settling flocs. Improves solid‑liquid separation in clarifiers or flotation units.

pH Adjustment

• Chemicals: Caustic Soda (Sodium Hydroxide), Lime (Calcium Hydroxide), Sulfuric Acid

• Function: Optimize pH for coagulation, flocculation, and biological treatment. Maintain stable operating conditions.

Disinfection

• Chemicals: Isothiazolinone (CMIT/MIT), Sodium Hypochlorite, Chlorine Dioxide, Hydrogen Peroxide

• Function: Kill harmful microorganisms in treated effluent, especially when discharging into sensitive water bodies.

Antifoaming

• Chemicals: Antifoaming agents (silicon based or non‑silicon)

• Function: Control excessive foam caused by surfactants and papermaking additives, preventing operational problems in treatment units.

Chelation & Metals Removal

• Chemicals: EDTA, DTPA, HEDP, ATMP

• Function: Complex heavy metals (e.g., copper, lead) present in wastewater, preventing toxicity and meeting metal discharge limits.

Advanced Oxidation (for Recalcitrant COD)

• Chemicals: Hydrogen Peroxide, Fenton’s Reagent (Fe²⁺ + H₂O₂), Ozone

• Function: Break down non‑biodegradable organic compounds (e.g., lignin derivatives, chlorinated organics) that resist conventional biological treatment.

Nutrient Supplementation

• Chemicals: Ammonium nitrate, Diammonium phosphate, Urea

• Function: Provide nitrogen and phosphorus to biological treatment systems when the wastewater is deficient, ensuring healthy microbial growth.

Chemicals Commonly Used in Pulp & Paper Wastewater Treatment

1. Category	Examples
   Coagulants	Aluminum Sulfate, PAC, Ferric Chloride, Polyamine
   Flocculants	Anionic PAM, Cationic PAM, Nonionic PAM, PolyDADMAC
   pH Adjusters	Caustic Soda, Lime, Sulfuric Acid
   Disinfectants	Isothiazolinone, Sodium Hypochlorite, Hydrogen Peroxide
   Antifoaming Agents	Silicone emulsions, polyether based
   Chelating Agents	EDTA, DTPA, HEDP, ATMP
   Oxidizers (AOP)	Hydrogen Peroxide, Fenton’s reagent, Ozone
   Nutrients	Ammonium nitrate, DAP

Why Choose HOO CHEMTEC for Your Paper Mill Wastewater Treatment?

• Direct manufacturer of many key products (PAC, PAM, Isothiazolinone, etc.) – stable supply, factory pricing
• SGS‑certified & ISO 9001:2015 – every batch tested; Certificate of Analysis (CoA) provided
• Global export experience – ship to over 50 countries, professional packaging and logistics
• Formulation support – we help choose the right polymer type and dosage based on your wastewater characteristics (jar test guidance)
• Free samples & technical support – test before you buy; our team is ready to assist