PFS

Polyferric Sulfate (PFS) – High-Efficiency Coagulant for Industrial Wastewater Treatment

Advanced Iron-Based Flocculant for Phosphorus & Heavy Metal Removal

Product Overview

Polyferric Sulfate (PFS) is an inorganic polymer coagulant synthesized through catalytic oxidation of ferrous sulfate. With multi-nuclear

 complexes it delivers stronger charge neutralization and adsorption bridging than conventional ferric salts. Ideal for treating 

phosphate-rich, high-COD, or heavy metal-laden wastewater, PFS reduces sludge volume by 30% while operating effectively in pH 3–11.

Key Functions &Mechanism of Polyferric Sulfate

Function	Mechanism	Target Pollutants
Rapid Phosphorus Removal	Forms insoluble  FePO4 via ligand exchange	Orthophosphate, organic P
Heavy Metal Trapping	Co-precipitation with Fe(OH)3 flocs	Cr⁶⁺, Cd²⁺, As³⁺, Pb²⁺
COD Reduction	Oxidizes organics via +Fe3+/Fe2+ redox	Dyes, oils, surfactants
Sludge Dewatering	Compresses sludge by charge neutralization	Reduces cake moisture by 15%

Primary Applications of Polyferric Sulfate

✅  Municipal WWTPs 

Achieves <0.5 mg/L TP (total phosphorus) to meet EU Urban Wastewater Directive

✅ Electroplating & Metal Finishing 

Removes Cr⁶⁺ >99.9% at pH 6–9

✅ Textile & Dyeing Wastewater  

Decolorizes reactive dyes (80–95% removal) without secondary pollution.

✅ Landfill Leachate  

Reduces COD by 40–60% and ammonia by 30% in high-salinity conditions.

✅ Paper & Pulp Mills 

Replaces aluminum salts to avoid fiber damage (maintains paper strength).

Competitive Advantages vs. Traditional Coagulants

Parameter	PFS	Ferric Chloride	Alum
Phosphorus Removal	>98% (0.1–0.3 mg/L residual)	85–90%	80–85%
pH Range	3–11	4.5–8	6–7.5
Sludge Volume	30–40% less	High	Very High
Corrosivity	Low (pH >2.5)	Severe	Moderate
Operational Cost	$0.15–0.25/ton wastewater	$0.25–0.35	$0.20–0.30

Technical Specifications of Polyferric Sulfate

Poduct Name	Poly Ferric Sulfate
Test Method	GB14591-2016
Specifications	Standard
Appearance	Yellow powder
Fe content (%)	19 -22
Main Ingredient	≥99%
Basicity(%)	8.0-16.0
PH Value	2.0-3.0
Fe2+(%)	≤0.15%
Water Insoluble	≤0.3%
Shelf life	24 months

Instruction of Polyferric Sulfate:

1. Before use, add PAC to tap water at a concentration of 5%-10% and stir it to be fully dissolved .

2. The dosage can be determined by lab test based on the properties of the raw water and the amount of alum flowers formed.

3. Generally, it is used on the same day of preparation. It is normal to have a slight sediment.

Package and Storage of Polyferric Sulfate:

PFS should be stored in cool and dry place, avoid from rain and sunlight, at the temperature no higher than 40 ℃.